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                               Abstract
      Analysis of water quality data collected from twenty-one water
quality surveillance stations located in the South Platte River Basin
of Colorado indicate significant deterioration of surface water quality
in the metropolitan Denver Area.  Data collected from 1968 through 1972
show an increase in bacteriological contaminants in the recent years.
Total cpliform bacteria concentrations increase three orders of magnitude
to 5xl05 organisms per 100 ml through the metropolitan area and this
degradation continues downstream to Nebraska.   In a similar fashion, fecal
coliform bacteria concentrations increase about two orders of magnitude
to 5000 organisms per 100 ml.  Concentrations  of dissolved oxygen, as
measured, show a complex variation with time but the low concentrations
(<5mg/l) are limited to the immediate metropolitan area and occur approxi-
mately twenty percent of the time (in 1972).  BODc concentrations have
increased significantly in the latter part of 1972 and early 1973 in the
stream reach immediately downstream from the Denver Metropolitan area,
and are thought to relate primarily to increased organic waste discharges
from the Denver Metro Sewage Treatment Plant.   Any pH problems appear
related to alkaline runoff since low pH's have not been observed.  Water
temperatures are generally within biological bounds, but data are lacking
for tributaries and discharge mixing zones.  Nutrient data suggest that
concentrations are high enough to be of concern insofar as algal growth
potential is concerned.

      Comparison of the surface water quality  data with objectives of
improving the surface water quality shows a need to decrease coliform
concentrations and increase dissolved oxygen concentrations in the South
Platte River.  The analysis also points out certain weaknesses in the
present frequency of sample collection and analysis from the surveillance
network.

      A surface water quality monitoring system comprised of thirteen
long-term stations is proposed.  Also proposed is a shorter-term sampling
program to define such variables as mixing zones, ground water recharge,
flow rates, effect of barriers, and the impact on quality of minor
tributaries and "storm" drains.


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                           TABLE OF CONTENTS

                                                                     PAGE
Abstract	   i

Introduction and Purpose. . . . .	   1

Classifications of Waters of the South Platte River Basin	    2
  Current and "Objective"

Water Quality Data for South Platte River Basin	    3
      Introduction - Stations Examined	   3
      Method of Analysis of Data	   3
      Col i form Bacteria Measurements	   9
      Dissolved Oxygen Measurements. . . .  .	   18
      Biochemical Oxygen Demand Measurements	22
      Hydrogen Ion Measurements	   25
      Temperature Measurements. . .. 	  25
      Nutrient Measurements	28
      Comparison of Data from Short-Term and Long-Term Sampling. ... 32
      Adequacy of Data	  32
      Summary of Long-Term Measurements	39
           Present Concentrations - Main Stem	39
           Long-Term Trends - Main Stem. .  .  .	39
           Tributaries	  40
           Relationship of Present Quality to	 40
             "Objective" Classification

Effluents  to the South Platte River and Tributaries	41

Future Water Quality Surveillance Program	41

Appendices:  Surface Water Quality Data for the	67
  South Platte River Basin
                                 - ii  -

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                       LIST OF TABLES
Table No.                  Title                                 Page
   1      Quantitative Water Quality Standards for	   4
            South Platte River in Colorado
   2      Quantitative Water Quality Standards for	   5
            Major Tributaries to the South Platte River in Colorado
   3      Water Quality Monitoring Stations - 	   6 & 7
            South Platte River Basin
   4      Total Coliform Data - Analysis of Extremes	  12
   5      Fecal Coliform Data - Analysis of Extremes	  17
   6      Dissolved  Oxygen Data - Analysis of Extremes.	  21
   7A     Major Classifications of Point-Source	  42
            Discharges to the Sou.th Platte River
   7B     Discharges of Record in "the South Platte	  43-63
            River Basin as of 1973
   7C     Summary of Major Industrial Discharges	  64
            in the South Platte River Basin as of 1973
   8      Proposed Water Quality Surveillance Stations	  66
            for the  South Platte River Basin in Colorado
                            -  iii  -

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                      LIST OF FIGURES

Figure No.                  Title                                 Page

    1     South Platte River System Showing Selected Water	in rear pocket
    :        Quality Surveillance Stations in Colorado

    2     Location of Primary Sampling Sites	   10
            Utilized to Evaluate Total Coliform Concentrations
            in the South Platte River Basin

    3     Current Concentrations of Total	   11
            Coliform Bacteria for South Platte River Basin

    4     Location of Primary Sampling Sites	   14
            Utilized to Evaluate Fecal Coliform Concentrations
            in the South Platte River Basin

    5     Current Concentrations of Fecal	   15
            Coliform Bacteria for South Platte River Basin

    6     Locations of Primary Sampling Sites	   19
            Utilized to Evaluate Dissolved Oxygen Concentrations
            in the South Platte River Basin

    7     Current Concentrations of Dissolved	   20
            Oxygen for South Platte River Basin

    8     Location of Primary Sampling Sites	   23
            Utilized to Evaluate Biochemical Oxygen Demand
            in the South Platte River Basin

    9     Current Concentrations of;Five-Day 	   24
            Biochemical Oxygen Demand for South Platte River Basin

   10     Location of Primary Sampling Sites Utilized	   26
            to Evaluate Temperature and pH in the South Platte
            River Basin

   11     Current Concentrations of Hydrogen Ion	   27
            for South Platte River Basin

   12     Current Range in Temperature for	   29
            South Platte River Basin

   13     Current Concentrations of Nutrients	   30
            for South Platte River
                            - iv -

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                 LIST OF FIGURES (continued)


Figure No.                  Title
   14     Comparison of Low versus High Frequency	 33
            Measurement of Dissolved Oxygen Concentrations -
            19th Street Station

   15     Comparison of Low versus High Frequency	 34
            Measurement of Fecal  Coliform Bacteria Concentrations -
            19th Street Station

   16     Comparison of Low versus High Frequency	 35
            Measurement of Five-Day Biochemical  Oxygen Demand
            Concentrations - 19th Street Station

   17     Comparison of Semi-Monthly versus Hourly	 36
            Measurements of Dissolved Oxygen Concentrations -
            19th Street Station

   18'    Comparison of Semi-Monthly versus Hourly 	 37
            Measurement of Fecal  Coliform Bacteria
            Concentrations - 19th Street Station

   19     Comparison of Semi-Monthly versus Hourly	 38
            Measurements of Five-Day Biochemical Oxygen
            Demand Concentrations - 19th Street  Station
                           -  v -

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                          APPENDICES

                  Surface Water Quality Data

               For The South Platte River Basin
                                                                 Page

A-l   Computer Plots of Total Coliform Concentrations	  69
        versus Time at Long Term Water Quality Monitoring
        Stations in the South Platte River Basin

A-2   Computer Plots of Fecal Coliform Concentrations	  76
        versus Time at Long Term Water Quality Monitoring
        Stations in the South Platte River Basin

A-3   Computer Plots of Dissolved Oxygen Concentrations	  83
        versus Time at Long Term Water Quality Monitoring
        Stations in the South Platte River Basin

A-4   Computer Plots of Five-Day Biochemical Oxygen 	  90
        Demand Concentrations versus Time at Long Term
      •  Water Quality Stations in the South Platte River Basin

A-5   Computer Plots of Hydrogen Ion Concentrations	  97
        (pH) versus Time at Long Term Water Quality Monitoring
        Stations in the South Platte River Basin

A-6   Computer Plots of Temperature versus Time	  104
        at Long Term Water Quality Monitoring Stations in the
        South Platte River Basin

A-7   Computer Plots of Nutrient Concentrations	  Ill
        versus Time at Long Term Water Quality Monitoring
        Stations in the Main Stem South Platte River
                            - vi -

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                      INTRODUCTION AND PURPOSE
      In the Region VIII Accomplishment Plan for the South Platte River -
Denver Metro area, the commitment was made to the preparation of a compre-
hensive report describing the quality of waters in the South Platte River
Basin in;Colorado. =*   This report draws upon an extensive data base in an
attempt to provide a reasonably quantitative description of water quality
in the main stem of the South Platte and its major tributaries (Bear Creek,
Cherry Creek, Clear Creek, St. Vrain Creek, the Big Thompson River, and the
Cache La Poudre River).  The description of water quality is termed "reasonably
quantitative" since the methods of calculating averages and means were not
statistically strict.  The primary analysis effort has been directed toward
those parameters that are controlled by present and proposed water quality
standards; namely, coliform bacteria, dissolved oxygen, pH, and temperature.
Also included in the analysis were BOD concentrations and nutrients in the
form of phosphate and nitrogen compounds.

      The specific objectives of this report are:

      1. To place the water quality data pertinent to the Regional
         Accomplishment Plan for the South Platte River Basin in one
         summary report.
      2. To evaluate the existing data and to identify any stream
         areas for which inadequate data were found.
      3. To recommend a sampling program that will facilitate the
         measurement of subsequent changes in water quality in the
         South Platte River Basin.

      The "Regional Accomplishment Plan for the South Platte River Basin"
proposed, as an objective under "Water Quality," the improvement of the
quality of the South Platte River to permit contact recreational use (a
classification presently termed "83") from the headwaters of the South Platte
to somewhere in the vicinity of Englewood, Colorado (near River Kilometer
(RK) 524).  The Accomplishment Plan also proposed the objective of improving
the waters from Exposition Avenue (RK 518.4) to the Colorado-Nebraska State
Line.  The exact locations of changes in the proposed standards ("objective"
classifications) have not been specified.  As will be explained later, some
arbitrary decisions as to classification changes were made to facilitate the
data analysis.  The EPA objectives are stated, in the Plan, as follows:
If  "Accomplishment Plan Region VIII South Platte River Basin Denver Area,"
    Environmental Protection Agency, Rocky Mountain Prairie Region, January 1972.

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                       SOUTH PLATTE RIVER BASIN

                           BROAD OBJECTIVES

      2.1 Water Quality

        ;  To improve quality of the South Platte River to permit
          beneficial uses hot now provided as follows:

          a. Water quality upstream from Denver will  be improved
             to permit recreation, including swimming, and drinking
             water supply through reduction of fecal  coliform levels.
             Existing fecal coliform levels will be reduced by
             approximately 50% to the compliance level of 100 per
             100 ML by December 31, 1973.

          b. Quality of Water in the Denver area and  downstream to
             the Colorado-Nebraska State line will  be improved to
             permit drinking water supply and warm water fisheries
             through reduction of fecal coliform and  through an
             increase in the dissolved oxygen level.   Existing fecal
             coliform levels in excess of 10,000 per  100 ML will be
             reduced by 30% below Greeley, Colorado by December 31,
             1972.  Fecal coliform levels in the entire reach in and
             below Denver will be brought to the compliance level of
             1,000 per 100 ML by December 31, 1976.  Dissolved oxygen
             compliance level of 5.0 milligrams per liter will be met
             in this reach by December 31, 1976 through a reduction of
             40,000 pounds of biochemical oxygen demand per day by the
             end of 1976.

      Thus the analysis incorporated in this report is focused on fecal
coliform bacteria concentrations, dissolved oxygen concentrations, and
biochemical  oxygen demand data since these parameters are utilized to
express objectives in the Accomplishment Plan.

CLASSIFICATIONS OF WATERS OF THE SOUTH PLATTE RIVER BASIN IN COLORADO

                      CURRENT AND "OBJECTIVE"

      Current stream classifications in Colorado protect the South Platte
River from its source to Exposition avenue (RK 518.4) for municipal water
supplies, cold-water fishery, industrial, and irrigation uses.  From
Exposition Avenue downstream to York Street (RK 518.4 to RK 504.4) the
classification provides for a warm-water fishery plus industrial and
irrigation uses.  From York Street to the Colorado-Nebraska State Line
(RK 504.4 to RK 134.7), the classification provides for industrial and
irrigation uses.  The quantitative limits coinciding  with these classifi-
cations are presented in Table 1.
                                   - 2 -

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      Table 1 also presents the "objective classifications" and their
quantitative limits as they have been derived and applied to the South
Platte River.  Table 2 presents these classifications for the major
tributaries to the South Platte River.  The "objective classification"
are those standards that are proposed for the River i.e., classification
objectives.  The points of "objective" classification change were selected
to coincide with present stream locations of classification change.  These
"objective classifications" and the reach designations have evolved from
the "Accomplishment Plan" as this Plan is affected by the Federal Water
Pollution Control Act Amendments of 1972.

      Both the current and "objective" classifications have been used as
a basis for comparisons in the ensuing presentation of water quality data.
It must be noted that the selection of "objective" classifications, though
discussed with others, was primarily an arbitrary process conducted by
the authors and should be considered only as such and, therefore, subject
to further discussion and change.

             WATER QUALITY DATA FOR SOUTH PLATTE RIVER BASIN

Introduction  - Stations Examined

      A large number of locations have been occupied within the South Platte
River Basin for the purpose of water quality determinations.  A total of
twenty-one long-term water quality monitoring stations were selected as the
basis for this report.  These stations are described in Table 3 and their
location shown in Figure 1 (in rear pocket).  Table 3 also lists the water
quality parameters measured at each station.  This report treats only those
water quality parameters considered critical in terms of the goals for
improvement of the South Platte River.

      The following sections present the existing water quality data in a
parameter-by-parameter fashion, and, within the framework of each parameter,
in an upstream to downstream order.

Method of Analysis of Data

      The data in existance for the South Platte River Basin have been
analyzed in a semi-quantitative fashion since the use of thoroughly quanti-
tative analytical methods would require resources that are not presently
available.  It was observed in the early stages of the data analysis that
simple concentration averages over periods of record did not always present
a true picture of current or even historical water quality at a particular
sampling location.  Therefore, a more intensive investigation of all avail-
able individual data points were undertaken to check the occurrence of
seasonal or yearly variations.  This investigation utilized the STORET
data system to obtain time-versus-concentration plots of selected parameters
at the desired sampling locations (see Appendix A).  Note that an upper
bound has been placed upon the data-plots according to the parameter plotted.
As an example, an upper bound of 1X105 total coliform per 100 ml was set.
                                   - 3 -

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                                                                     TABLE  I

                                           Quantitative Water Quality Standards for South Platte Rivet-
                                                                   in Colorado
                                                                 Present  Classifications ~
Affected Stream Reach
Parameter
Total Col i form (MPN or MF) 1m total coli/lOOml
Fecal Coliforml/ (MPN or MF) Ira fecal coli/lOOml
DO (mg/1)
pH (S.U.) Standard Units
Temperature (°F)
TDS (mg/1)
Source to Enolewood to
Englewood Exposition
RK 523.0 RK 518.4
B1 , C, D1 BI , C, D,
Mo Standard No Standard
1000/2000 (10:;) 1000/2000 (IDS)
6 6
6.5 - 8.5 6.5 - 8.5
70^ 70^
TWMM - THMM
Exposition St.
to York St.
RK 322.1
B2, C, D)
No Standard
1000/2000 (10")
5
6.5 - 8.5
90S/
TWMM
York St. to
Nebraska St. Line
RK 134.7
C, D, 2/
No Standard
No Standard
3
5.0 - 9.0
90^
TUMM

Parameter
Total Colifornr- (MP!I or HF) gm total coli/lOOml
Fecal Coliform-^ (MPtl or MF) gm fecal coli/lOOml
DO (mg/1)
pH (S.U.)
Temperature (°F)
Turbidity
"Objective" Classifications
Affected Stn
Source to
Englewood
RK 523.0
A, B1
Body Contact
Cold Hater Fishery
1000
200/400 (10~)
6/7 (spawn)
6.5 - 8.3
4/
58 (spawn)/65 ~
10 JTU
Secchi disk visible
to 1 meter

2am Reach
tnglewood to
Exposition
RK 518.4
B, , PUS -1
Cold Hater Fishery
10,000
1000/2000 (10")
6/7 (spawn)
6.0 - 9.0
4/
58 (spawn)/65 -
10 JTU


txpositlon to
State Line
RK 134.7
B2, PUS ^
Warm Hater Fishery
10,000
1000/2000 (10. )
5
6.0 - 9.0
90 -'
50 JTU
V   Present classifications are based upon Colorado Water Quality  Standards  dated  September  1,  1971

2/   Letter Designation

3/   (1m) log mean, (10'")  more than 10" of samples  collected  in  30  day  period

4/   i2°F change from ancient stream temperature

5/   i5°F change from ambient stream temperature

6/   (PWS) Public Water Supply

U   (gm) geometric mean = log mean

8/   Time Weighted Monthly Mean (TWMM)
                                                             -  4  -

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                       TABLE 2

Quantitative Water Quality Standards for Major Tributaries
          to the South Platte River in Colorado
               Present Classifications -'
                                       4/
Stream Letter Designation lm total coli/lOOml im fpcal coli/lOOml
Bear Creek to A, B, , D,
Morrison
Bear Creek
Morrison to B,, D,
S. Platte
Cherry Creek B2, B,
Reservoi r
Cherry Creek Res. none
to S. Platte
Clear Creek-Source to A, B , C, D
Farmers Highline
' Canal
cn
Clear Creek-Farmers A, C, D.
1 Highline Canal to
S. Platte
St. Vrain Creek C, D
Lyons to S. Platte J
Boulder Creek B2, C, Dj
Boulder Canyon to
S. Platte
Big Thompson River
Loveland WTP to S. Platte C, D,

Cache La Poudre R. B2, C, D-|
Greeley WTP
Diversion to 2nd Ave.
Greeley
Cache La Poudre R. C, D,
2nd Ave. Greeley
to S. Platte
no std.


no std.

^ 1000 m.a. —

no std.

no std.



no std.


no std.

no std.



no std.

no std.



no std.


*1000/
2000 (10%)

< 1000/
2000 (10%)
f 100

no std.

< 1000/
2000 (10%)


£ 1000/
2000 (10%)

no std.

.f 1000/
2000 (10%)


no std.

<• 1000/
2000 (10%)


no std.


no oH TDS Temperature
(mg/1) (su) (ma/1) (°F)
}6 6.5 ^ 500 £70
8.5
•j i
f 5 6.5 TWMM -' * 90
8.5
^ 5 6.5 no std. S 90

no std. no std. no std. no std.

26 6.5 500 470
8.5


?4 6.0 500 <90
9.0

-> 3 5.0 TWMM t 90
9.0
1 5 6.5 TWMM i 90
8.5


> 3 5.0 TWMM <90
9.0
? 5 6.5 TWMM < 90
8.5


-> 3 5.0 TWMM 590
9.0

\J   Log mean (lm)

2/   Monthly average for 5 consecutive samples (m.a.)

3/   Time Weighted Monthly Mean (TWMM)

4_/   Present classifications are based upon Colorado Water Quality Standards dated September 1,
                                                         1971

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                                                                  TABLE 3
                                       Water Quality Monitoring Stations - South Platte River Basin
                                                          (Utilized in this Report)
Location
South Platte River
South Platte

South Platte River
Highway 470

South Platte River
Bowles Avenue

Bear Creek
Jeff-Arap. County Line

South Platte River
1 Dartmouth Avenue
CT>
1

South Platte River
Alameda Avenue

Cherry Creek
at Mouth

\ South Platte River
19th Street

\South Platte River
Franklin Street


Clear Creek upstream
from Golden

Clear Creek
near Mouth
River1'
Kilometers

564.5


539.0


530.7


525.3/6.8


524.1

523.0
518.4

517.4


511.3/0.2


510.6


505.3

504.4
500.7/28.8


500.7/0.5
River1)
Miles

350.8


334.9


329.8


326.4/4.


325.7

325.
322.1

321.5


317. 7/
0.1

317.3


314.0

313.4
311. 1/
17.9

311.1/0
Primary Parameters
Period of Fecal Total
Record Col i form Col i form Do BOD Temp

11/68-10/72 X X X X X


12/68-9/72 X X X X X


12/67-12/72 X X X X X


2 1/68-10/72 X X X X X


10/66-12/72 X X X X X

Standards change from A, Bi, C, D-| to Bi , C, D,
Standards change from Bi , C, Di to B->, C, D-,
•' 1*1 L. * 1
10/66-12/72 X X X X X


10/66-12/72 X X X X X


10/66-12/72 X X X X X


10/66-12/72 x X X X X

Standards change from 82, C, Dj to C, D-|
5/68-10/72 X X X X X


.3 1/68-11/72 X X X X X

Sampling
pH T-P04 NO.-j-N NH3N Agency

XX XX Colo. St.
Health Dep.

XX XX Colo. St.
Health Dep.

X - - - Denver Co.
Health Dep.

XX XX Colo. St.
Health Dep.

X - - Denver Co.
Health Dep.



X - - - Denver Co.
Health Dep.

X - - - Denver Co.
Health Dep.

X - - Denver Co.
Health Dep.

X - - Denver Co.
Health Dep.

XX XX Colo. St.
Health Dep.

XX XX Colo. St.
Agency
Station No.

000025


000024


1513


000036


1091




0699


0346


0305


0001


000035


000034
                                                                                                                                Health Dep.
1)   Measured from mouth  of South  Platte  River  at Colorado-Nebraska  State  Line

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                                                                  TABLE 3
                                       Water Quality Monitoring Stations - South Platte River Basin
                                                          (Utilized in this Report)
Location
South Platte River
at Henderson
St. Vrain Creek
Downstream from Longmont
St. Vrain Creek
Near Mouth
Boulder Creek
Boulder-Weld County Line
Big Thompson River
Near Mouth
Cache La Poudre upstream
from Ft. Collins
Cach La Poudre River
Near Greeley
River '
Kilometers
485.5
434.5/27.7
434.5/2.1
434.5/28.0
11.3
419.1/1.4
400.7/90.6
400.7/4.7
River1)
Miles
301.7
270. O/
17.2
270. O/
1.3
270. O/
17.4/7.0
260. 4/
0.9
249. O/
56.3
249. O/
Primary Parameters
Period of
Record
1/68-11/72
4/69-10/72
1/68-11/72
4/68-10/72
1/68-11/72
1/68-10/72
1/68-11/72
Fecal
Coliform
X
X
X
X
X
X
X
Total
Col i form Do
X X
X X
X X
X X
X X
X X
X X
Sampling Agency
BOD Temp pH T-P04 N03-N NH3N Agency Station No.
X X X X XX Colo. St. 000023
Health Dep.
X X X X XX " 000031
X X X X XX " 000029
X X X X XX " 000033
X X X X XX " 000028
X X X X XX " 000026
X X X X XX " 000027
                                                  2.9
South Platte River
  Near Kersey

South Platte River
  At Balzac

South Platte River
  Near Julesburg
396.7
280.0
140.0
246.5
174.0
87.0
1/68-11/72 X
1/68-11/72 X
1/68-8/72 X
X     X    X    X    X      XX
X     X    X    X    X      XX
X     X    X    X    X      XX
                                                 000022
                                                 000021
                                                 000020
1)  Measured from Mouth of South Platte River at Colorado-Nebraska  State Line

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Thus, high values such as two of about 1.7 and 1.3X10^ total  coliform per
100 ml measured in 1966 and 1967 at the 19th Street bridge (RK 510.6) were
not plotted.  Similarly, high concentrations of coliform bacteria measured
in 1966 for South Platte River samples at the Franklin Street Station are
not shown since all values measured in 1966 exceeded 1X10^ coliform per 100
ml.  If no upper bound had been set and these high concentrations had been
included1 in the computer-plots, then the resulting line graph would have
been skewed upward so far tfiat the lower data points representing much
Vower concentrations of coliforms (such as those near the concentration
limit of 1000 total coliforms per 100 ml) would have been compressed and
barely distinguishable on the bottom of the graph.  The upper bound was
also used to eliminate obviously incorrect (too high) values such as a
D.O. measurement of 50 mg/1 on 4 Jul 70 at the 19th Street Bridge Station.

      No attempt was made to provide accurate geometric or log means of
all the historic data for total and fecal coliforms.  Standards for these
parameters are based upon the collection of more than a single sample once
each month or two week period, and the majority of the data presented herein
was collected only monthly or biweekly.  As a result, the calculation of
daily or monthly means using the historic data is statistically inaccurate
and the historic data are inadequate for specific comparison with the
standards.

      In contrast, the values plotted as median values on the summary plots
(Figures 3, 5, 7, 9, 11, and 12) are either arithmetic means or approximate
median values for the historic data for all parameters.  The use of mean
or median values was determined by the degree of variability of the individual
data points.  Means were used for normal distributions of data and medians
were used for assymetrical distributions of data.  The range of values included
within the "standard deviation" - type limits used in the summary graphs
takes into account all but the most extreme values reported for that period
of record which appears to best describe the "current" quality of the South
Platte River.  Thus, if an improvement over time is indicated, the summary
graph shows only the range of concentrations for the recent past as opposed
to the longer historic period of record.

      Certain of the data presentation graphs include the results of water
quality measurements made by the EPA National Field Investigations Center-
Denver during 1971.2'  In some cases these 1971 "special survey" data were
collected at the same locations as are the long-term data.  In cases of
differing locations, the river mileage of the 1971 "special survey" location
is denoted,

      It should also be noted that no attempt was made to resolve differences
between the "Most Probable Number" (MPN) and "Membrane Filter" (MF) methods
of coliform determination.  All coliform data were considered equivalent in
the summary graphs.  No correlation between the results of the two methods
has been determined.

|7"Report on Effects of Waste Discharges on Water Quality of the South
    Platte River-Denver Metropoliton Area" & "Report on Effects of Waste Discharges
    on Water Quality of the Cache La Poudre & S. Platte Rivers-Greeley Area."
    Both reports by the EPA National Field Investigations Center-Denver & the
    EPA Region VIII Office, Denver, Colorado, June, 1972.
                                   - 8 -

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      The graphical presentation was selected to facilitate reading and
comprehension.

      In brief summary, the Figures should provide a reference for future
measurements.  If, for example, BODs data collected in 1973 show a mean
concentration lower than that portrayed in Figure 9, we should be able to
conclude that the quality of the South Platte is, in fact, improved.
Similarly, if all the BODij measurements for 1973 fall  well below the upper
bound of the range shown in Figure 9, the water quality of the South Platte
should be improving.  Of course exceptions to such general conclusions can
be developed.

      If such comparisons are attempted in the future, one must consider
that infrequent (weekly, monthly) measurements of water quality at a
long-term monitoring station do not necessarily reflect short term, yet
lethal, impacts on the surface water system.  Such short term increases
in pollutants may, in fact, prevent attainment of desired stream classi-
fications.  With the exception of some recent measurements made in the urban
area of the South Platte River (these data are.not included here), the
historic data have been derived from an infrequent measurement schedule.

Coliform Bacteria Measurements

Total Coliform Bacteria

      Sampling locations utilized for examination of Total Coliform Bacteria
are shown in Figure 2.  An analysis of samples collected at these locations
reveals that the South Platte River contains relatively high concentrations
(in excess of 1X106 organisms per 100 ml) of total coliform bacteria as it
passes through the metropolitan area (Figure 3).  The river is considered to
have undergone significant deterioration by the time it passes Bowles Avenue
(RK 530.7) and to reach a peak in coliform concentration at Franklin Street
(RK 505.3).  The deterioration is evidenced by an increase in coliform con-
centrations from about 100 to about 5X105 organisms per 100 ml.  The River
never fully recovers to upstream concentrations while flowing on through
Colorado.  Further, significant variations (100-fold) in concentrations have
been measured at all locations downstream of, and including, Franklin Street
(RK 505.3).  No total coliform standards presently apply to the South Platte
River.  Assuming that the objective standard would be 1000 organsims per 100
ml upstream of Exposition Avenue (RK 518.4 to the headwaters) and 10,000
organisms per 100 ml downstream of Exposition Avenue (RK 518.4 to RK 134.7),
a high percentage of potential violations of standards was suggested by the
data review.  Data shown in Table 4 summarize the possible violations of total
coliform bacteria limits in terms of the recent (1972) data, and the last 3
years of data (1970-1972).  This summary suggests a recent (1972) deterioration
of the South Platte River in terms of total coliform bacteria carried through
the metropolitan area (RK 517.4 to RK 505.3).  Conversely, some improvement
in quality downstream of the metropolitan area was suggested by the decrease
in total coliform bacteria carried in the South Platte River from its junction
with Clear Creek (RK 500.7) downstream to the State Line (RK 134.7).

      The results of examination of the time-plots (Appendix A-l) for each
station suggest that the trend since 1966 has been toward a ten-fold, or order
                                  - 9 -

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                                                                  KEY
                    Fort
                    Collins
Boulder
                                                               Sampling  Site on
                                                               Main Stem of River
Sampling Site on
Tributary to River
                    FIGURE 2  LOCATION OF PRIMARY SAMPLING SITES
                       UTILIZED TO EVALUATE TOTAL COLIFORM CONCENTRA-
                       TIONS IN THE SOUTH PLATTE RIVER BASIN

-------
   $00,000
   100,000
    50,000
    10,000
v
Q-
E
O
r    5,000
     1,000
       500
                                                                                          FIGURE  3
                                        Current Concentration of Total  Coliform Bacteria (Median  and Range) For South Platte River Basin In Colorado
                                                                                  Based On Selected  Data
       100
                                                                                                                                Objective Standard
                                                     Note:  There  is  no present  standard
                                                                                                                                    LEGEND
                                                                                                                                        Main Stem Sampling Site
                                                                                                                                        Tributary Sampling Site
                    550
                                       500
^00                350               300
     South Platte River Kilometers
                                                                                                                                   250
                                                                                                                                                     200
                                                                                                                                                                        150

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                     TABLE 4

Total Coliform Bacteria - Analysis of Extremes
               Objective         Percentage of single measurements
               Standard          exceeding stated objective standard
Station location
South Platte
1-470
Bowles
Bear Creek
Dartmouth
Alameda
Cherry Creek
19th Street
Franklin
Clear Creek
Henderson
St. Vrain Creek
Big Thompson River
Cache La Poudre River
Kersey
Balzac
Julesburg
(log mean/100 ml)
1000/2000
1000/2000
1000/2000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
1970-1972
20
14
9
14
16
15
36
33
56
72
74
71
75
81
56
29
43
1972
0
0
5
17
14
23
36
38
95
40
50
71
71
57
43
0
0
                     - 12 -

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of magnitude, decrease in total coliform bacteria concentrations in the
South Platte River.  The derivation of this trend is strongly based on the
very high coliform bacteria concentrations measured in 1966 by the City and
County of Denver Health Department.  Review of the data without these 1966
values would not be as optimistic toward long-term improvement since the
concentrations appear to have remained about the same since 1968 and have
increased with time through the downstream area as discussed previously in
connection with Table 4.

    Data collected in the latter half of 1971 by the EPA National  Field
Investigations Center-DenverfV and represented in the graphs in Appendix
A-l by solid vertical lines show higher concentrations by an average factor
of about 5, at certain locations on the South Platte River (Bowles Avenue,
Kersey, Julesburg) and on certain tributaries than are suggested by the
long-term data.  On the other hand, field investigations by the Regional
EPA office!/ during mid-1972 on the upper South Platte River revealed approxi-
mately the same mean total  coliform value (425 per 100 ml, average of 17
measurements) at Bowles Avenue as is shown by the long-term data.   The
factors influencing such comparisons are too numerous to describe  here, but
basically they relate to the size of the sample (number of samples and period
of time over which the sampling occurred).

Fecal Coliform Bacteria

    Sampling locations utilized for analysis of concentrations of fecal coli-
form bacteria are shown in Figure 4.  Starting at Bowles Avenue (RK 530.7)
and progressing downstream through the Denver metropolitan area, the South
Platte River undergoes significant deterioration in terms of an increase in
the fecal coliform concentrations (Figure 5).  Upstream concentrations on the
order of "<100" organisms per 100 ml increase to about 5000 organisms per 100
ml at Franklin Street (RK 505.3).  With the additional contribution of fecal
coliforms from the Big Thompson and Cache La Poudre watersheds, the River
never recovers while flowing through Colorado.  In a fashion similar to that
for total coliform, the concentration of fecal coliform bacteria peaks at
Franklin Street (RK 505.3) to concentrations as high as 150,000 organisms
per 100 ml.

    Fecal coliform standards presently exist for the South Platte River
(Table 1) from the headwaters to the York Street bridge (RK 504.4).  The
standard reads as follows:

    "Bacteria:  Wastes or substances from controllable sources shall
    not be discharged into these waters in amounts which will cause
    the number of organisms of the fecal coliform group, as determined
    by either multiple tube fermentation or membrane filter techniques,
    to exceed a log mean of 1000 per 100 ml or exceed 2000 per ml  in
    more than 10% of the samples collected in any 30-day period."
3/  Bacteriological Investigations of the Upper South Platte River Basin, May,
   July, and September, 1972," Rpt #S&A-TSB-6, Technical Support Branch,
   Surveillance & Analysis Division, Environmental Protection Agency, Region
   VIII, Denver, Colorado, December, 1972.


                                   - 13 -

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                                              Sampling Site on
                                              Main Stem of  River
                                             Sampling Site on
                                             Tributary to River
FIGURE U  LOCATION OF PRIMARY SAMPLING SITES
   UTILIZED TO EVALUATE FECAL COLIFORM CONCEN
   TRATIONS IN THE SOUTH PLATTE RIVER BASIN

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  1,000,000  •
    $00,000
                                          FIGURE 5.
Current Concentrations of Fecal  Coliform Bacteria For  South  Platte  River  Basin  in  Colorado
                                    Based on Selected  Data
    100,000  -
     50,000   •
                                                                                                                    LEGEND
                                                                     Main Stem Sampling Site
                                                                     Tributary Sampling Site
Oi
I
     10,000  -
      5,000
      KOOO
        200
        100
                                                                             1(00                 350               300
                                                                                   South Platte  River  Kilometers
                                                                                                                                   250
                                                                                                                                                       200
                                                                                                                                                                          150

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      As discussed in an earlier section, the long-term data are grab samples
collected at a relatively low frequency and cannot,  therefore,  generally be
used to determine with certainty whether the maximum of 2000 fecal  coliform
per 100 ml has been exceeded over sufficiently long  enough period to stand
as a violation.  This data can only be used as a general indication of the
presence or absence of violations.

      Based on such a use of the long-term data* it  appears that the present
water quality standards are exceeded at one South Platte main stem location
i.e., Franklin Street (RK 505.3).  If the present standard were extended
downstream (as proposed by the objective standard),  three additional locations
would have excessively high fecal coliform concentrations-Henderson (RK 485.5),
Kersey (RK 396.7) and Julesburg (RK 140.0).

      The "objective" standards have been considered to be log  or geometric
means of 200 fecal coliforms per 100 ml from the source to Exposition Avenue
(RK 518.4) and 1000 fecal coliform per 100 ml from Exposition Avenue to the
State Line (RK 518.4 to RK 134.7)1'•  Such standards are to be  judged against
the measurement of not less than five water samples  collected in a 24-hour
period.  Maximums of 400/100 ml and 2000/100 ml for  10% of samples during a
30-day period are also proposed.  Complicating the analysis is  the problem
that the 200/100 ml limit may be reduced to 100/100  ml  in Colorado.

      Indications are that fecal coliform concentrations will have to be de-
creased throughout the South Platte Basin to meet the "objective" standards.
Estimated median values at 1-470 and Bowles Avenue on the South Platte River
(RK 539 and RK 530.7, respectively) are equal to the 200/100 ml standard.
Estimated mean values at Franklin Street, Henderson, Kersey, and Julesburg
on the South Platte River are high by a factor of 3  in  comparison with the
"objective" standards.  Excursions of fecal coliform concentrations over the
objective standards are sufficiently frequent at most stations  to suggest
that reductions in the concentrations of fecal coliform bacteria must be
accomplished throughout the river system.  Table 5 summarizes the frequency of
occurrence of fecal coliform concentrations which exceeded the  present standards
or which would exceed the objective standards.  Table 5 portrays a probable
long-term (since 1970) improvement in the quality of the South  Platte River
in the area downstream of Denver (Kersey, Balzac, Julesburg) by virtue of the
observed decrease in percentage of potential violations in that part of the
downstream reach.  The quality of the downstream tributaries appears to have
neither improved nor worsened with respect to fecal  coliform concentrations
since 1970.  However, it appears that the quality has decreased in the metro-
politan area over the same period.   In fact, the data collected at the Franklin
Street location suggest serious deterioration in quality since  1970 (measured
in terms of fecal coliform bacteria) since mean concentrations  at this station
have increased from 500 to 2000 to 5700 (organisms per  100 ml)  from 1970 to
1972.  In addition, there have been sporadic occurrences of very high (^2X105

4/A more restrictive fecal coliform limit of 100/100 ml may be appropriate
    for the "primary contact" waters in the upstream reach.
                                 - 16  -

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                 TABLE 5

Fecal  Coliform Data - Analysis of Extremes
             Objective         Percentage of single measurements
             Standard          exceeding stated objective standard
Station location
South Platte
1-470
Bowles
Bear Creek
Dartmouth
Alameda
Cherry Creek
19th Street
Franklin
Clear Creek
Henderson
St. Vrain Creek
Big Thompson River
Cache La Poudre River
Kersey
Balzac
Julesburg
(log mean/100 ml)
200
200
200
1000
1000
1000
1000
. 1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1970-1972
5
32
13
19
16
13
14
23
53
44
83
71
90
95
68
33
52
1972
0
. 33
0
0
10
23
9
33
77
0
100
71
86
100
43
20
40
                      - 17  -

-------
counts/100 ml) fecal coliform bacteria concentrations at a  few sampling
locations (Franklin Street and Henderson are the most notable locations).
These values are not accurately reflected in the graph on page 78 in Appendix
A-2 because nearly 70% of the reported values (for 1972) exceeded the set
upper limit of the graph of 104 fecal  coliforms per 100 ml  and could not be
depicted.

Dissolved Oxygen Measurements

      Sampling locations utilized for analysis of Dissolved Oxygen are shown
in Figure 6.  Review of the long-term trends in concentrations of dissolved
oxygen (DO) in the South Platte River Basin has proven to be a challenge.
As may be construed from the station-by-station plots of DO measurements
(Appendix A-3) an irregularly cyclic variation has been identified for all
metropolitan sampling locations.  The cyclic variations cannot be related
either to the time of year or to mean annual flows.  The variations in DO
concentrations from 1967 through 1972 appear somewhat similar to a cross-
section view of a saucer (V^_^y ) with major rises on either side (1967 and
1972) minor increases toward the middle (1969 and 1970). .Unfortunately for
the quality of the River, relatively low values of DO (on the order of 4 mg/1;,
see Figure 17) were measured during 1972 and a possible trend toward improve-
ment of water quality (in terms of increased dissolved oxygen) was interrupted.

      The DO content of the South Platte River decreases to an average of
about 6 mg/1 through the metropolitan area (see Figure 7) and then generally
increases to about 8 mg/1 downstream of the Henderson sampling station
(RK 485.5).  Present stream standards are set at 6 mg/1 from the headwaters
to Exposition Avenue (RK 518.4), 5 mg/1 from Exposition Avenue to York Street
(RK 518.4 to RK 504.4), and 3 mg/1 downstream of York Street to the State  Line.
Some problems exist in meeting the current standards since  approximately 20
percent of DO measurements made in 1972 at locations upstream of York Street,
but within.the metro area, were below the standards concentration of 5 mg/1.
Especially indicative of problems were the results of DO measurements at
Bowles Avenue (RK 530.7) where the estimated median value for the period of
record (1967-1972) is just equal to the present standard or limit value of
6 mg/1.

      Implementation of the objective standards would increase the present
limit concentration of 3 mg/1, which applies downstream of York Street, to
5 mg/1 (with occasional excursions to 4 mg/1 acceptable) but would not change
the upstream limits (see Figure 7).  Table 6 summarizes the number of potential
violations of the objective standards based on analysis of the 1970 thru 1972
data.  As with other parameters previously discussed, an improvement in the
dissolved oxygen content of the South Platte River throughout the metropolitan
area must be achieved in order to meet the objective standards.

      The results of the short-term surveys conducted during the second half
of 1971 were generally in agreement with the long-term data with the exception
of the Henderson location where short-term data showed a violation of present
standards (2.4 mg/1 measured in 1971) while the long-term data have not been
lower than about 3.4 mg/1 since 1968 (see page 85  in Appendix A-3).
                                  - 18 -

-------
                                                                                    KEY
                            Longmont
                    Boulder
10
 i
                                                                                Sampling  Sites on
                                                                                Main  Stem of River
                                                                               Sampling Sites on
                                                                               Tributaries to River
                                         FIGURE  6  LOCATION  OF  PRIMARY SAMPLING  SITES
                                           ITTILIZED TO  EVALUATE DISSOLVED OXYGEN CONCEN-
                                           TRATIONS IN  THE  SOUTH  PLATTE RIVER BASIN

-------
                                                               FIGURE  7

                Current Concentrations of Dissolved Oxygen  (Median  and  Range)  For  South Platte River Basin in Colorado

                                                       Based on Selected  Data
15





13


12


11
       i  8
        TV
         1U1
LEGEND


 •  Main Stem Sampling Site

 A  Tributary Sampling Site
                                                                                                    ObJ ec tive_S tanda rd_
                                                                                         Present Standard
550
               500
                                             OO            350            300

                                              South Platte River  Kilometers
                                                                                        250
                                                                                                       200
                                                                                                                      150
                                                                                                                                     100

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                   TABLE 6



Dissolved Oxygen Data - Analysis of Extremes
Station location
South Platte
1-470
Bowles
Bear Creek
Dartmouth
Alameda
Cherry Creek
19th Street
Franklin
Clear Creek
Henderson
St. Vrain Creek
Big Thompson River
Cache La Poudre River
Kersey
Balzac
Julesburg
Objective
Standard
(mg/1)
6
6
6
6
6
5
5
5
5
5
5
5
5
5
5
5
5
Percentage of single measurements
exceeding stated objective standard
1970-1972
0
0
40
0
33
26

24
36
0
26
0
14
10
15
0
0
1972
0
0
27
0
19
23
0
14
27
0
0
0
0
0
0
0
0

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Biochemical Oxygen Demand (BOD) Measurements

      Sampling locations for the BOD measurements  examined  in  this  report
are shown in Figure 8.   The Biochemical  Oxygen Demand  (5-day)  or BODs  increases
from about 2 mg/1  upstream of Denver to  an estimated mean of 15  mg/1  at Franklin
Street (RK 505.3)  and then "tails-off" to about 5  mg/1  near the  Nebraska state
line (Figure 9).  The station-by-station plots (Appendix A-4)  show  excursions
to more than 10 mg/1 at various main-stem and tributary stations between the
Metropolitan area  (Alameda Avenue - RK 517.4) and  Kersey (RK 396.7) and these
excursions are especially noted in more  recent years.   Based on  an  average flow
at Henderson during 1972 of about 10 cms (350 cfs) and  an average BODc concentra-
tion of about 14 mg/1,  the average 6005  load has been  12 metric  tons per day
(2.6X104 pounds) passing the South Platte River station at  Henderson.

      More recent BODg measurements (1st quarter of 1973)  indicate  an increasing
trend in BOD5 load at the Henderson sampling site.  Based on an  average monthly
flow of 9.2 cms (325 cfs) during the first quarter of  1973, the  average BODs
load in the South Platte River at the Henderson sampling site was 21.5 metric
tons per day (4.7X104 Ibs per day).  This load is approximately  double the
average BODs load  measured during 1972.

      An analysis  of BOD5 data collected during January and February, 1973,
at the South Platte River mainstem and tributary sampling  sites  upstream and
downstream of the discharge from the Denver Metro Sewage Disposal District
#1 Plant (plus BODs effluent data from the plant) indicated that the increased
BOD§ concentrations at the downstream Henderson sampling station were due pri-
marily to increased organic loads imposed by the sewage treatment plant dis-
charge.  If overall improvement of the quality of the  South Platte  River is
to occur, a distinct improvement in the treatment capability of  the Denver
Metro Sewage Disposal Plant must be achieved.

      Data .collected at the Julesburg station suggest  that  the quality of the
South Platte River at this point (RK 140) has improved since 1968 as shown
by a decrease in the 6005 concentration from 11 mg/1  during peak concentration
periods to about 5 mg/1 at peak periods in 1971, 1972, and  the first quarter
of 1973.  Based on an average flow during 1972 of approximately  6.5 cms (230 cfs)
and an average BOD5 concentration of 2 mg/1 the BODs load  averaged  about 1.1
metric tons per day (2.5X103 pounds per day) in 1972.

      Peak BOD5 concentrations tend to occur during the winter months at
sampling locations downstream of Henderson (downstream of RK 485.5).  Similar
peaks in BOD5 concentrations at "metropolitan" stations upstream of Henderson
appear to be inversely related to flow and not influenced by the same industrial
processes common to the lower South Platte River drainage.

      No BODs standards are in existence or proposed for the South Platte
River Basin.  BODs concentrations have been historically utilized as a con-
venient measure of oxygen-demanding loads introduced by major dischargers to
the South Platte River System.  The "Broad Objectives" of the South Platte
Accomplishment Plan have been written in terms of BODs load reductions of
                                  - 22 -

-------
                            Longmont
Go

 I
                   Boulder
                                                                                 Sampling Sites on
                                                                                 Ma1h Stem of River
                                                                                 Sampling  Sites on
                                                                                 Tributaries  to River
                                        FIGURE  8  LOCATION OF PRIMARY SAMPLING SITES
                                           UTILIZED  TO  EVALUATE  BIOCHEMICAL  OXYGEN DEMAND
                                           IN THE  SOUTH PLATTE RIVER  BASIN

-------
                                                                               FIGURE  9
                    Current Concentrations of  5-day  Biochemical Oxygen  Demand  (BOOj-Median  and  Range)  For  South  Platte River  Basin  1n Colorado
                                                                      Based  on Selected  Data
>~~

60

55

50

i»5


140

35

30


'

20
15


10
5
n
o


.



•


^
0>
4)
O

£"
0
^
o ^~
"«
o
•
*»  +J '


1 IJ















LEGEND

• Main Stem Sampling Site
01
]j A Tributary Sampling Site
iz
u
•' • 3 ?
5 ^
V)
1 I . . .! .
                550
                                500
                                               1*50
*tOO            350            300
  South Platte River Kilometers
                                                                                                          250
                                                                                                                         200
                                                                                                                                        150
                                                                                                                                                       100

-------
4X104 pounds per day (18 metric tons per day) by 1972 and 9.5X104 pounds per
day (43 metric tons per day) by 1976.

      The full impact of BODr load reductions of this size cannot be measured
by the existing long-term water quality surveillance stations since the present
BODg loads at some of these stations are at least an order of magnitude less
than the; proposed reduction.  For example, average BOD5 loads in 1972 are
estimated to be 12, 11.1, 2.0, and 1.1 metric tons per day at Henderson, Kersey,
Balzac, and Julesburg, respectively.  It is suggested that major reductions
in BOD,- loadings will have to be monitored at or quite near their sources
(municipal treatment plants and sugar beet processing plants).

Hydrogen Ion (pH) Measurements

      Sampling locations utilized for analysis of pH measurements are shown
in Figure 10.  The acidity/alkalinity (pH) of the South Platte River Basin
is not considered to be a strong function of any municipal or industrial
discharges but rather to be controlled by runoff and recharge to the River
system.  As a result of its independence from ''control," p.H, along with
temperature, as determined at the long-term stations, is considered to be
a strong factor in determining appropriate stream classifications and sub-
sequent quantitative standards whenever these classifications are strong
functions of the hydrogen ion content and temperature of the water.

      Present standards require adherence to a 6.5 to 8.5 (S.U.) range from
the headwaters of the South Platte River to York Street (RK 504.4).  Down-
stream of York Street the range is increased to 5 to 9 (S.U.).  The present
standards have not been exceeded on the acid side (<7.0 S.U.) at the long-
term stations and those excursions over the basic side (>7.0 S.U.) might
all be related to periods of rapid snow melt or otherwise rapid runoff
(Figure 11).

      The standards objectives would lower the upper bound from 8.5 to 8.3
.(S.U.) in the stream reach providing for body contact recreation (Source
to Englewood - RK 523.0) and would raise the lower bound from 5 (S.U.) in the
lower reaches to 6 (S.U.).  No significant problems are envisioned with the
more restrictive bounds except in the cases of Cherry Creek and Clear Creek
where some limitations on selected effluents may be necessary to insure
maintenance of the South Platte and the appropriate tributary classification.

Temperature Measurements

      Sampling locations utilized for analysis of temperature measurement
are also shown in Figure 10.  Along with the hydrogen ion content (pH), the
temperature range of the South Platte River and its tributaries is not con-
sidered to be a strong function of any point-discharges, at least not as far
as the quality of the river system is represented by data from the long-term
stations.  Discharges with the potential to affect the temperature of the
South Platte River are thought to be those associated with three power plants
(Arapahoe, Zuni, and Cherokee) the Martin Marietta facility discharging to
Brush Creek, and, perhaps the Coors facilities, discharging to Clear Creek.
                                  - 25 -

-------
                                                                                           KEY
                                             Fort
                                             Collins
                         Boulder
ro
CD
                                                                                        Sampling Sites on
                                                                                        Main Stem of River
Sampling Sites on
Tributaries to River
                                               FIGURE- 10 LOCATION OF PRIMARY SAMPLING SITES
                                                  UTILIZED  TO EVALUATE TEMPERATURE AND pH
                                                  IN THE  SOUTH PLATTE RIVER BASIN

-------
                                                                                        /JGURE II

                                           Current Concentrations of Hydrogen Ion (pH)(Medfan 6 Range)  for South Platte  River Basin  in Colorado

                                                                                  Based on Selected Cata
             10
 I
ro
         I   7
                        550
                                       $00
                                              LEGEND

                                               •  Main Stem Sampling  Site

                                               A  Tributary Sampling  Site
kOO            ISO            300
  South Platte River Kilometers
                                                                                                                250
                                                                                                                               200
                                                                                                                                              150
                                                                                                                                                             too

-------
The summary graph (Figure 12) shows a slight tendency of the upper bound
(of the temperature range) to rise from about 21° C (70° F)  to about 24°  C
(75° F) as the River moves through the Denver metropolitan area.   At Balzac
(RK 280.0) the temperatures range up to about 29° C(85° F) but this high
value is presumed to be a function of the topography, climate, and amount
of water present in the vicinity of this sampling station.

      The present water quality standards for the South Platte River set
an  upper temperature limit of 21  C(70° F) upstream of Exposition Avenue
(RK 518.4) and 32° C (90° F) downstream from Exposition Avenue to the State
Line.  With the exception of values of about 22° C (72° F) that have been
measured on occasion at Bowles Avenue (RK 530.7) and Dartmouth Avenue
(RK 524.1), no problems have been encountered in meeting these temperature
criteria.  Of course the data are insufficient to measure the short-range
rise in temperatures near specific outfalls to determine whether abrupt
changes in temperature are caused by such outfalls.  The apparent increase
in temperature from 1970 to 1971 suggested by the station-by-station plots
in Appendix A-6 is thought to be related to the decrease in average annual
flow occurring from 1970 to 1971.

      The standards objectives could change only the upper bound on the
coldwater fishery portion of the South Platte (upstream of Exposition Avenue
- RK 518.4) from its present limit of 210 C (70° F) to 14.5° C (58° F)
(suitable for all cold water species).  The long-term data indicates that
such a standard may be too strict for the upper reaches of the South Platte
River if the fish species introduced or desired are sensitive to the higher
temperatures likely to occur in the River.  It may be appropriate to instead
place an upper bound of 18° C (65° F) (suitable for brown trout) on the upper
reaches.

Nutrient Measurements

      A selected amount of nutrient data were reviewed to ascertain the
quality of the main stem of the South Platte River in terms of concentrations
of nitrates (as nitrogen), phosphate (as phosphate), and ammonia (as nitrogen).

      Nitrate concentrations showed a tendency to fluctuate somewhat sporadi-
cally throughout the river reach.  Concentrations increased almost 15 fold to
about 3 mg/1 (as N) as the river passed through the Denver Metropolitan area
(Figure 13).  Near the Nebraska State Line a reduction in nitrate concentra-
tion to about 1.5 mg/1 (as N) was observed.  Unusually high concentrations
(3 to 4 times normal) were measured at all stations during mid-1970 (see
Appendix A-7).  Even with this significant increase the nitrate concentrations
have remained well below the recommended limit of 10 mg/1 (as N) for drinking
water purposes.  This does not negate the fact that the presently measured
nitrate concentrations may be a signficant factor in the production of algae
growths in the South Platte River.

      Phosphate concentrations rise from about 0.1 mg/1 (as total P04) measured
upstream from Denver (RK 564.5) to about 7 mg/1 downstream at the Henderson
station (RK 485.5).  Concentrations then.gradually decrease to about 0.5 mg/1
(T-P04) as the Nebraska State Line is approached.  Concentrations of total
phosphorus above 0.1 mg/1 are generally thought to significantly enhance the

                                   -  28 -

-------
                                FIGURE  12




Current Range In Temperature for South Platte River  Basin  In  Colorado




                        Based on Selected Data
. 35 — 95
30 - 85
80
25 _
1 75
"""" 7fi
• / u
» 65

,5- 1 60
° C
£ 55
S "
|-10— 0. 50

4)
3
5 u
O MO
•- 35
0 —
30
25

20

15


10



5





•

•

-

•



•
•

























1


j
1



1
1
'
,
[
Present Standard 	

T










J

LI - A
I 1












. [ ' f










i
•

i i i





•








Objective Standard

LEGEND

u >v
t £
•£ l^
"o. fo.
J |J
E U
v >-
y> '2
c Li
i e
















*
?.
O C£.
^ •*- ft)
1) K 1-
0) _* I- C 3
-M o o — i ^
j:OL*.4i >£« U1_TDT3 JZ N JJ

O O ^ ^— OJ 4J-r-(D *" 3
w m o (_> x <-?
ill i 1 i t 1 i i
550 500 <«50 1*00 350 300 250 200 150 100
                South Platte River Kilometers

-------
                                                                              FIGURE  13

                                     Current Concentrations of  Nutrients  (POi,,  NOj,  NHj)  For South Platte River In Colorado

                                                                      Based  on Selected Data
CO
o
                                                                                                           LEGEND
                                                                                                              N03-N
                                                                                                              NH3-N
             563.3

              350
                                       300
1*02.3    Kilometers     321.9
    South Platte River
 250       Miles         200
      21*1.'*
Downstream -
        150
160.9

 100
80.5

  50

-------
production of algae in streams and lakes (assuming other necessary growth
factors are available).—/  It is evident that control  of phosphorus is
required in the South Platte River in and below the Denver Metro Area if
an excessive growth of nuisance algae is to be prevented since nitrogen
concentrations and temperatures are suitable for algal  growth.  An upward
trend in phosphate concentrations has been observed at Henderson and Kersey
(RK 485.5 and RK 396.7, respectively) since 1970.   The factors which have
produced this increase are not completely identifiable, but they may relate
to the increase in organic waste discharge from the Denver Metro Sewage
Disposal District #1 Plant which was discussed in an earlier section dealing
with BOD5 concentrations in the South Platte River.

      Ammonia concentrations also increase appreciably as the South Platte
River passes through Denver (from 0.04 mg/1 to 5.8 mg/1) (as nitrogen) and
then decrease downstream to the State Line (0.1 mg/l)(as N).  Significant
peaking in ammonia concentrations has been observed during the winter and
spring seasons.  However, in 1972 the ammonia concentrations at Henderson
(RK 485.5) did not drop through the summer to the extent noted in the past.
The normal decrease from winter to summer is from about 12. mg/1 NH3 (as N)
to about 1 mg/1 NH3 (as N) but during the 1972 summer season the NHo con-
centration remained at about 10 mg/1 (as N).  Increasing effluent flow
from the Denver Metro Sewage Treatment Plant located at RK 502.4 may have
contributed to the increased NH3 concentrations observed in 1972 at the
Henderson site (RK 485.5).

      Concern has been expressed over possible ammonia toxicity in the South
Platte River and the possible need for ammonia removal at the Denver Metro
Plant.  Recent research indicates that only the un-ionized fraction (NH3) of
ammonia is toxic to fish, and that the highest concentration of un-ionized
ammonia which apparently will not cause any adverse effects is 0.025 mg/1
NH3 as NH3 (0.0206 mg/1 NH3 as N)6/-  The un-ionized fraction of total ammonia
is, in large part, a function of pH and temperature, with the fraction in-
creasing as pH and temperature values increase.

      Based on long term average values for pH (8.0) and temperature (highs
near 20°C) at the Henderson sampling site (located approximately 17 kilometers
downstream from the Denver Metro Plant discharge), the concentration of total
ammonia (NH3 + NH+) in the river must not exceed 0.54 mg/1 NH3 as N if the
toxic un-ionized ammonia fraction (NH^) is to remain below the recommended
limit of .0206 mg/1 NH3 as N (variables other than pH and temperature are
considered to be insignificant in this calculation).  Since the river contains
an average concentration of approximately 6 mg/1 total NHo as N at this loca-
tion, there clearly exists a great potential for serious impairment of the
warm water fishery in this stream reach.  These facts present a strong case
for the adoption by the Denver Metro Sewage Treatment Plant of additional
treatment facilities designed for a high degree of ammonia removal.


5/ Proposed Criteria for Water Quality, Vol. I, U.S. Environmental Protection
   Agency, Washington, D.C., uctooer, 1973.
6/ The Proposed Criteria for Hater Quality published by the U.S. EPA Agency,
   October, 1973, page 95, states: "The acceptable maximum concentration of
   un-ionized ammonia  in water  is 0.02 mg/1."

                                   - 31  -

-------
Comparison of Data from Short-Term and Long-Term Sampling

      To determine if there were significant differences  in  measurement of
parameters between infrequent, long-term sampling and intensive,  short-term
sampling, an examination and comparison of sample results under both conditions
was made at the 19th Street sampling location (RK 510.6). These  results are
presented in Figures 14 through 19.  In general  the figures  show  that long-
term data (regular semi-monthly sampling by the  Denver County Health Dept.)
and short-term data (daily sampling coordinated  by the Denver Regional  Council
of Governments (DRCOG) study program) are in fairly close agreement throughout
the April-July comparison period for dissolved oxygen (DO) and fecal coliform
parameters.  The BOD5 values also agree closely  during the latter period of
comparison (June-July), but during the earlier period (April-May) the long-
term data is about 50% less than the short-term  data.  Note  also, in Figure
14, the low concentrations of dissolved oxygen (<4 mg/1)  which are frequently
encountered at the 19th Street sampling location.

      Comparisons were also made between samples collected at frequent (4 hour)
intervals during the day and samples collected, only once  during the same day
at the same location.  It was found that significant variations in water
quality (particularly BOD5 concentrations) occurred throughout the day at
the 19th Street sampling site (See Figures 17 through 19).  The above results
indicate that the long-term data (derived from semi-monthly  grab  samples)
employed in this report does not always accurately reflect the existing stream
conditions which would be observed through an intensive daily sampling program.

Adequacy of Data

      The data presented and reviewed herein are almost all  "long-term data,"
that is, they have been collected infrequently at widely-spaced stations.
As such the data.are moderately adequate.  The representativeness of the data
is considered questionable in the following areas:

      1. The exact sampling locations are not well-defined and, as a
         result, the data are comprised of samples which  may have been
         collected from different river mileage  locations or under
         different mixing conditions.

      2. The time of day for sample collection has not been  consistent.
         DO samples may be significantly affected by this variable.  (In
         some cases, this variation may be desirable).

      3. Flow data for the sampling locations are not generally obtained
         at the time of sample collection.

      4. Methods of measuring coliform bacteria  vary from agency  to agency.

      As discussed earlier, these data are not collected  in  a manner (fre-
quency or duration) to allow accurate evaluation of the potential to violate
quantitative standards.  In general, the weakness lies in the fact that the
length of time that a specific concentration exists is not determined.
                                  - 32 -

-------
                            10
OJ
OJ
                        1'
                         V
                         O!


                         I   5

                         -o
                         
-------
                                             FIGURE 15
    5000
    2500
o
o
«   1000
§
o
E
o
     500
     250
                     Comparison of Low versus High Frequency. Measurement of
                             Fecal Coliform Bacteria Concentrations
                        19th Street Station (RK 510.6) South Platte River
                                                            LEGEND
•  Data From High Frequency (""Daily")
     Water Quality Monitoring
     (DRCOG Study)

^( Data From Low Frequency ("Semi-Monthly")
     Water Quality Monitoring
    (Denver County:rHea1th Department)


*

0

April
May
i ii
10 20 30


June
July
i i i i ' i
i»0 50 60 70 80
Days
                                            -.  34 -

-------
CO
en
                             20
                             18
                             16
                             12
                         a
                         2   10
                        FIGURE 16

Comparison of Low versus High Frequency Measurement of
   Five-Day Biochemical  Oxygen Demand Concentrations
   19th Street Station (RK 510.6) South Platte River
                                                                                       LEGEND
                                                                                          Data From High Frequency (••'"Daily") Water
                                                                                            Quality Monitoring  (DRCOG Study)

                                                                                          Data From Low Frequency ("Semi-Monthly")
                                                                                            Water Quality Monitoring
                                                                                            (Denver County Health Department)
April
0
May
i i i
June
July
1 1
10 20 30 kO 50 60 70 80 90
Days

-------
                                                                            FIGURE  17



                                                   Comparison of Semi-Monthly versus Hourly Measurements of

                                                                Dissolved Oxygen Concentrations

                                                       19th Street Station (RK 510.6) South Platte River
GO
01
                        c
                        01
                        01
                        "O
                        o
                                                                                             May 10-11, 1972
                                                           LEGEND


                                                            O
                                                              DRCOG Study Data (—"Hourly")
                                                              Denver County Health Department Data  (*»"Semi-Month1y")
                            0

                            0800
1200
1600               2000


         Time, Hours
                                                        2400
0^00

-------
                                              FIGURE  18
                       Comparison of Semi-Monthly versus Hourly Measurement of
                               Fecal Coliform Bacteria  Concentrations
                          19th  Street Station (RK 510.6) South Platte  River
   11
   10
                             LEGEND
                              o DRCOG Study Data  (—"Hourly")


                             ^^ Denver County Health Department Data
                                              (•'"Semi-Monthly")
c_>

ra
                       1200
1600    ,           2000

         Timei  Hours
2^00
0<400
                                                 -  37 -

-------
                                                                     FIGURE  19
Co
oo
                         12
                         10
                      _  8
                       UN
                      O
                      O  ,
                      CD  O
k  Y
                          2  I-
                            0800
                                             Comparison of Semi-Monthly versus Hourly Measurements of
                                                Five-Day Biochemical Oxygen Demand Concentrations
                                                19th Street Station (RK 510.6) South Platte River
                                                                          ^ -c—'
                                                                      July 11-12, 1972
                                                                              * DRCOG Study Data (-'"Hourly")


                                                                              ^Denver County Health Department Data
                                                                                            (^"Semi-Monthly")
                                               1200
                                        1600               2000

                                                 Time,  Hours
                                                                                                                          0*400

-------
      Further, the present sampling network does  not adequately identify
sources of pollutants.  For example, the network  does not define the  impact
on water temperature of discharges from three power plants located  on the
South Platte River nor from a brewery located on  Clear Creek  or a manufacturing
facility located on Brush Creek.   The network does not facilitate the identi-
fication of contributions of contaminants from minor tributaries such as
Lakewood Gulch and various storm sewers.

      In addition, the present sampling network is not designed to  quantify
variables such as ground water inflow to the streams, the state of  existing
aquatic biota, non-point sources of pollution, or the role of sediment
transport and deposition.  Therefore accurate modeling of the entire  river
system is not presently feasible.

                    SUMMARY OF LONG-TERM MEASUREMENTS

Present Concentrations - Main Stem

      The main stem of the South Platte River.in  Colorado undergoes deteri-
oration as it passes through the Denver Metropolitan Area (RK 539.0 to RK
485.5).  In terms of coliform bacteria, the highest concentrations  are
normally measured at the Franklin Street sampling location (RK 505.3),
averaging about 550,000 total coliform organisms  and 3000 fecal coliform
organisms per 100 ml.  Concentrations sporadically rise to as much  as 100
times these median values.  The dissolved oxygen  content of the South Platte
River also decreases from a median upstream value of about 8  mg/1 to  a median
value of about 6 mg/1, with fluctuations of 2 mg/1 as the River traverses
the metropolitan area.  The 5-day biochemical oxygen demand of the  river
increases through the metropolitan area to a median value of  about  15 mg/1
with fluctuations in excess of 25 mg/1.  Temperature and pH data show only
minor deterioration through the metro-area.  Nutrient data (NOo, PO^, NHs;
reflect a deterioration, especially in phosphate  and ammonia  (to about 7 mg/1
and 6 mg/1, respectively), not only through Denver but also downstream as
far as Kersey, about 100 kilometers downstream of the metropolitan  area.

      The overall deterioration of the South Platte River is  not relegated
to just the reach immediately downstream from the major treatment plants,
but rather occurs throughout the Metro area.

Long-Term Trends - Main Stem

      Long-term trends in water quality appear to be associated with  a decrease
in coliform bacteria in the River since 1966 complicated by a disturbing upward
trend in concentrations measured in the metropolitan area recently.  Dissolved
oxygen concentrations have varied in a cyclic yet unpredictable fashion through-
out the period of record and though there is some sign of decreasing  water
quality recently, equally low values of D.O. have occurred in periods of the
past.  BOD5 .concentrations have remained about the same at most locations
through the period of record except for the Henderson location which  has
shown a doubling in concentration during the first quarter of 1973.  BODg
concentrations at several locations within metropolitan Denver have also
shown sporadically high values in the more recent data (1972).
                                   - 39  -

-------
      To a certain extent, improvements in the water quality of the South
Platte River that appeared imminent in 1970 (when compared to 1966-1968)
have not completely materialized.

Tributaries

      The bacteriological quality of the major tributaries to the South Platte
River improved over the period of record.  The dissolved oxygen concentrations
fluctuated in a manner similar to that of the South Platte itself whereas
the 6005 concentrations showed a minor tendency to decrease.  Of those tri-
butaries for which data were reviewed, the Cache La Poudre carried the highest
median concentrations of bacteria and BOD5 and the lowest median D.O.  con-
centration.  Clear Creek, by virtue of sporadic excursions of increasing
bacteria and BOD^ concentrations, also warrants designation as a continuing
deterrent to achievement of high quality water in the South Platte River
Basin.

Relationship of Present Quality to "Obective" Classifications

      In order to meet the water quality standards or "objective" classifi-
cations herein proposed for the South Platte River Basin, the following.
changes in present water quality must be achieved:

      1. Average total coliform bacteria concentrations must be
         reduced by an order of magnitude or more in both the
         South Platte River through Denver and in all major tri-
         butaries downstream of Cherry Creek.

      2. Average fecal coliform bacteria concentrations must be
         reduced by a factor of three in both the South Platte
         River through Denver and the Big Thompson River and
         reduced by a factor of 20 in the Cache La Poudre River.

      3. Average dissolved oxygen concentrations must be generally
         increased to prevent excursions of long duration below the
         "objective" standards of 6 and 5 mg/1.  This may require
         a 20 percent increase in DO or implementation of methods
         to reduce the sizable fluctuations (downward) of disssolved
         oxygen.

      4. In order to achieve the changes listed above, the BODs
         concentrations will have to be reduced.

      Since the data herein presented and summarized continue to be collected
infrequently, and since variations in concentrations are functions not only
of controllable discharges but also of the season, stream velocities and
flow quantity, channel configuration, mixing, and precipitation/recharge, it
will not be easy to ascertain whether improvements in water quality are achieved
by just reviewing the long-term data.  However, monthly review of long-term
data can provide a rough indicator of permanent changes in water quality.  Such
changes must then be proven by quantifying the previously mentioned variables
of season, velocity and flow quantity, channel configuration, mixing,  and
duration of concentration.
                                   - 40 -

-------
            EFFLUENTS TO THE SOUTH PLATTE RIVER AND TRIBUTARIES
      The South Platte River is estimated to receive a total of 17.4 cms
 ("400 MGD) from industrial and municipal discharges.  This amount is comprised
 almost equally of discharges from municipal water and waste water treatment
 plants and industries (see Table 7A).  While the discharge amount is somewhat
 low compared to discharges from industrialized areas in the East and Midwest,
 the amount estimated as being discharged to the South Platte River system is
 approximately equal to the four year average annual flow (1969-1972) near
 the State Line at Julesburg (~20 cms or ~700 cfs).  Therefore, the discharges
 can have a significant impact on the quantity and quality of the South Platte
 River.

      Table 7B lists the known discharges to the South Platte River System
 along with water quality monitoring stations and tributary locations.  The
 industrial data are derived from applications to EPA for discharge permits.
 The vast majority of the industrial discharges.come from 24 facilities,
 each having estimated flows equal to or in excess of 0.09 cms (~2.0 MGD)
 (see Table 7C).  The Metropolitan Denver Waste Water Treatment Plant is
 estimated to account for over 50 percent of the flow from the municipal
 discharges (5.09 cms or 116 MGD).

      It seems reasonable to hypothesize that since water quality degradation
 of the South Platte River occurs primarily as increases in coliform bacteria
 and organic material, municipal discharges share a large part of the responsi-
 bility for the degradation.


              FUTURE WATER QUALITY SURVEILLANCE PROGRAM


  EPA-Region VIII, proposed a comprehensive water quality surveillance system
 for the South Platte River Basin in March of 1973.Z/  The proposed system
 included 23 main stem stations and 34 tributary stations.  Of the total of
 57 stations, 25 were occupied at the time of the March, 1973 report.  Recent
 decreases in funding have forced an intensive review of all comprehensive
 monitoring systems and, therefore, the earlier plan is herein modified and
 reduced to its essentials.

      It is felt that the major objective of the water quality surveillance
 network will be to evaluate ambient water quality against water quality
 standards.  Detection of "spills" or accidental  releases will be the re-
 sponsibility of point source monitors as opposed to the surveillance network.
 Measurements to define the fate of most point and nonpoint discharges must
 be conducted as short term (<1 year) surveys.  Mixing relationships at


1J "Water Quality Monitoring Plan in South Platte River Basin, Colorado and
    Wyoming," Surveillance Branch, Surveillance and Analysis Division, U.S.
    Environmental  Protection Agency, Region VIII, March, 1973.
                                   - 41 -

-------
                          TABLE 7A



           Major Classifications of Point-Source Discharges

                  To The South Platte River Basin
                                      Total Discharges
      Facilities                   MGD   .             CMS
Water Treatment Plants             9.*                0.40


Waste Water Treatment Plants     184.2                8.09


Industry                         203.5                8.93



                    TOTAL        396.9               17.4
                            - 42 -

-------
GJ
 I
                                                                                  TABLE 7B
                                                     Discharges of Record In the South Platte River Basin as of 1973
                                                                 Discharges  to  South  Platte  River  -  Main  Stem
                                                                                                                                       Pertinent Operations &
Name
WQS1) - South Platte Colorado
Kassler Water Treatment Plant
Denver Water Board
Martin Marietta Corp
Deer Creek enters @ 336.5 through gravel pit
Plum Creek enters @ 335.5
WQS - Interstate Highway 470 Bridge
Peter Kiewit & Sons
WQS - Bowles Ave Bridge
Englewood Water Treatment Plant
Littleton Waste Water Treatment Plant
see Bear Creek enters @ 326.4
Public Service Company (Arapahoe Station)
WQS - Dartmouth Ave. Bridge
Englewood Waste Water Treatment Plant
WOS - Alameda Ave. Bridge
Type of Facility

Domestic Water
Mfg. Research
Gravel
Construction
Domestic Wtr.
Sewage
Power Gen; coal
Sewage

Location Average Flow
RM RK MGD CMS
350.8
339
341.1/2.
334.9
330
329.8
328
327.6
328
325.7
325.1
321.5
564.5
545.5 0.17 7.46X10'3
548.9/ 0.55' 24.1 X10'3
3.2
539.0
531.1 0.3 13.2 X10-3
530.7
527.8 0.28 12.3 X1Q-3
527.2 5.2 .228
527.8 1.3 57.1 X10'3
524.1
523.2 8.6 .377
517.4
Pollutants affecting
water quality

(solids)
Sewage, Metal Plating
(solids, BOD5, Temp.)
Into Brush Creek


(solids)
(solids, BOD5)
(sol ids , Temp. )
(BOD5, solids)

                   WQS = Water Quality Station

-------
                                                                      TABLE 7B



                                         Discharges of Record In the South Platte River Basin as of  1973



                                  Discharges to South Platte River - Plum Creek (RK 335.5 on South Platte)
                 Name
Castle Rock Waste Water Treatment Plant



E.I.  DuPont Corp.
Location

Type of Facil ity
Sewage
Manufacturing

RM
335.5
335.57
C ->

RK
539.9
539.97
T rt T
Average Flow

MGD
0.2
0.9

CMS
8.78xlO"3
39.5xlO'3
Pertinent Operations &
Pollutants affecting
water quality
(BOD5)
(solids, BOD5)
                                                                                                                            (Potential  NH3, pH)

-------
                                 TABLE 7B



       Discharges of Record In South Platte River Basin As Of 1973



Discharges to South Platte River - Bear Creek (RK 326.4 on South Platte)
                                                                                     Pertinent Operations &
Location Average Flow Pollutants affecting
Name Type of Facility RM RK MGD CMS water quality



I
tn
i
Public Service Company Water Treatment
Plant, Evergreen
Public Service Company Old Water
Treatment Plant, Evergreen
Evergreen Waste Water Treatment Sewage
Plant
Public Service Company-Water
Treatment Plant, Kittridge
WQS - Jefferson-Arap. Co. Line

326.4/30
326.4/30
326.4/25
326.4/20
326.4/4.2

525.3/48.3 0.03 1.3xlO~3
525.3/48.3 0.03 1.3xlO"3
525.3/40.2 0.2 8.78xlO~3 (Solids, BOD5, Bacteria)
525.3/32.2 0.003 .13xlO"3
525.3/6.8


-------
                                                                               TABLE 7B

                                                     Discharges of Record in South Platte River Basin as  of 1973

                                                          Discharges to South Platte River - Lakewood Gulch



                                                                                                                                       Pertinent Operations
                                                                               Location                      Average Flow               & Pollutants affecting
            Name	Type  of Facility	RM	RK	MGD	CMS	  Water Quality	



            South  Lakewood  Waste         Sewage                           319.7         •  513.2          1.8                  .079       (BOD5, solids)
              Water Treatment  Plant
cr>

-------
                                                                    TABLE 7B

                                          Discharges  of Record In South Platte River Basin as  of 1973

                                                  Discharges to South Platte River - Main Stem
Name
                                 Type of Facility
        Location
RM                   RK
      Average Flow
MGD        '         CMS
    Water Treatment Plant
    see Rocky Mtn.  Ditch enters @ 314.38
    WQS - Franklin  St.  Bridge
Pertinent Operations &
  Pollutants affecting
  Hater Quality
Gates Rubber Co. (Mississippi
Avenue)
Roberts Food
Public Service Company
(Zuni Plant)
Ellis Foods
see Lakewood Gulch
see Cherry Creek enters @
WQS - 19th St. Bridge
City Ice Company
Burlington Northern RR
Safeway Stores
Denver Northside Waste
mfg. rubber products

Power Gen. -gas, oil
coal
Food Processing,
Canning
317.7

Fueling-car washing

Sewage
322.5
322.35
319
318
318
317.3
317
316
316
314.4
519.0
518.8
513.4
511.8
511.8
510.6
510.1
508.5
508.5
506.0
0.8?
1.67
0.072
44.0
0.06
0.4
0.01 est.
0.07

.035
.073
3.16xlO"3
1.93
2.63xlQ-3
17.6xlO-3
.44xlOest_
3.07xlO'3

(BOD,, solids O&G,
Heavy Metals)
(TDS, pH )
Cooling, ion exchange
(BOD5, solids, Temp. )
Cooling Water (Temp.)
(Solids)
Overflow (BOD5\
(Solids)
Storm Sewer collects
                                                                      Pond Seepage RM 314.5
314.0
                 505.3

-------
                                                                            TABLE 78

                                                Discharges of Record In The South Platte River Basin as of 1973

                                        Discharges to South Platte River - Cherry Creek Enters at 317.7 on South Platte
             Name
                                                                                Pertinent Operations &
                                 Location               Average Flow              Pollutants affecting
Type of Facility	RM	RK	MGD	^	CMS	Water Quality	
             Glendale Sanitation District
                                                       Sewage
                            317.7/5     511.3/8.0   0.3
13.2xlO"3
               WQS - at mouth of Cherry Creek
                            317.7 /      511.3/0.2
                                0.1
00

 I

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                                                                                         TABLE 78



                                                               Discharges  of Record  in South  Platte River Basin  as  of 1973



                                                                Discharges to South  Platte River - Rocky Mountain  Ditch enters @ 314.4
                                                                                                                                                Pertinent Operations
Name
GAP
Type of Facility
Manufacturing
RM
314. 38/
Location
RK
4 505. 93/, ,
Average Flow
MGD ' CMS
0.027 l.lSxlO"3
Pollutants affecting
Water Quality
(pH, Solids)
-pi
10

-------
                           TABLE 7B
Discharges of Record In the South Platte River  Basin  as of 1973
       Discharges to South Platte River - Main  Stem
                                                                              Pertinent  Operations  &



1
tn
0
i


Name
Denver Rendering
National By-Products
Public Service Co. (Cherokee Station)
Metro Denver Waste Water Treatment Plant (also
discharges to Burlington Ditch)
see Sand Creek enters @ 312.1
; see Clear Creek enters @ 311.1
South Adams Waste Water Treatment Plant
WQS - Henderson - Bridge to Adams Co. Fairgrounds
Stokely Van Camp
Brighton Waste Water Treatment Plant
Great Western Sugar - Brighton
Type of Facil ity


Power Gen. , Coal
Sewage
Sewage
Food Processing,
Canning
Sewage
Sugar Beet
Processing
Location Average Flow Pollutants affecting
RM RK MGD CMS Water Quality
313
313
312.5
312.2
306.7
301.7
296
295.8
295.6
503.7 0.86
503.7 0.18
502.9 6.5
502.4 116.0
493.6 1.8
485.5
476.4 0.063
476.0 1.3
475.7 2.5
.038 (BOD5, solids)
7.9X10'3 Cooling
.285 (solids, pH)
5.09 (BOD5, solids)
.079 (BOD5, solids)
2.76X10'3 (Temp.)
.057 (BOD5, solids)
.110 Condenser + Irrig. Return
(BOD5, nutrients)
                                                                             Bacteriological

-------
                                                                      TABLE  7B

                                           Discharges of  Record  in South  Platte  River Basin  as  of  1973

                                     Discharges to South  Platte  River - Sand  Creek enters  South Platte  ra  312.1-
                                                                                                                         Pertinent  Operations  &
Name
Buckley Air National Guard
Waste Water Treatment Plant
Fitzsimons Hospital Waste
Water Treatment Plant
Stapleton International Airport
i City and County of Denver
en
1 Refinery Corp.
Continental Oil
Type of Facility
Sewage and
Maintenance
Hospital Sewage
Maintenance
Refinery
Refinery
Location
RM RK
312.1/9
312.1/5
312. I/
312.1 -
31 2. 1/
502. 3/
14.5
502. 3/
8.0
502 . 3/
502.3
502.3
Averaae
MGD
0.09
0.23

0.144
0.65
Flow
CMS
3.95xlO-3
lO.OxlO"3

6.3xlO"3
28.5xlO"3
Pollutants affecting
Water Duality

Discharged to Toll Gate Creek
Can be Discharged to Toll
Creek used for irrigation
Bypass of stormwater & ind
waters possible
(BOD5, Solids, N)
(BOD,-, Solids, N)
Gate


Lester Jones Sand and Gravel
                                   Aggregate
                                                           312.I/
502.3/
0/F to Sand Creek via Burl.
Ditch

Washing
I/  Discharged to Burlington Ditch which c_an_ overflow to Sand Creek

-------
                                  TABLE 7B

       Discharges of Record In the South Platte River Basin  as of 1973

Discharges to South Platte River - Clear Creek,Enters South Platte @ 311.1
                                                                                     Pertinent Operations


1
en
r\>
i


Name
Loveland Ski Basin
Mountain Aggregate
American Metals Climax - Urad
Georgetown Waste Water Treatment Plant
Idaho Springs Haste Water Treatment Plant
Golden Water Treatment Plant
WQS - Upstream of Golden
Type of Facility
Recreation (Sewage)
Sewage
Sewage
Domestic Water
Location
RM RK
311
311
311
311
311
.17 500.
49
.17 500
49
.17 500,
38.7
.17 500
19
.17 500,
17.9
flrtnlnh Coors Company

Wheat Ridge Waste Water Treatment Plant

Suburban Sand and Gravel
Brewery, Ceramics,
Sewage, Plating
Sewage


311

311

311
.17
18
.!/
7.7
.17
500.

500.

,67
78.9
.67
78.9
,67
62.3
.67
30.6
,67
28.8
67
30.0
67
12.4
500.67
Average Flow
MGD CHS
0
8
0
0

23

2

0
.2
.93
.3
.59

.0

.1

.58
8.78X10-3
.392
.013
25.9X10-3

1.01

.092

.025
K Pollutants affectinci
Water Duality
(Solids)
(BOD5, Bacteriological)

(•SOD5, Solids,
Cooting
(BOD5, solids.

(Solids)

Temp . )

Bact.)


 Clear  Creek  Valley  Waste Water  Treatment  Plant




Arvada Waste Water Treatment Plant


  Cotter  Corporation (Sc.hwartzwalder Mine)




Western Paving


Baker Metro Water Treatment Plant


Baker Waste Water Treatment Plant


Western Paving


Peter Kiewit

  WQS - Near Mouth
                  Sewage and Sigman      311.17   500.67      0.5
                  Meat Co. (0.36 mgd)         7.0      11.3
                                                                        21.9X10
                                                                               '3
Sewage
Mining


Domestic Water

Sewage







311

311

311

311

311

311

311.

.17
6

.17
3
.17
4
.17
3.
.17
2,
.17
2.
,17
0.
,7


.8

.0

.4

.5

0

3
500

500

500,

500.

500.

500.

500

.67 1.1
10.8

.67 0.085
6.1
.67 0.084
6.4
.67 1.0
5.5
.67 0.1
4.0
6/ 0.03
3.2
•67
0.5
.048

3.73X10'3

3.69X1Q-3

.044

4.39X10-3

1.3X10-3



(BOD5,  solids)
                                                                                      (BOD5, solids)

                                                                                      Discharges  to Ralston
                                                                                        Creek
                                                                                      (BOD5, solids)

-------
                                                                               TABLE 7B

                                                    Discharqes of Record in South Platte River Basin as  of 1973

                                            Discharges to South Platte River - Big Dry Creek enters  South Platte @ 288.6
          Name
Type of Facility
    Location
RM           RK
                    Average Flow
                 MGD     '      CMS
                             Pertinent Operations &
                               Pollutants affecting
                               water quality	
          (U.S. AEC)
          Dow Chemical  Rocky Flats
Nuclear Materials
  Manufacturing
288.6/30     464.4/
                48.3
                 0.31
                              13.6x10
                                                                           -3
                             To Great Western Reservoir
en
GO
          Broomfield Waste Water
            Treatment Plant
          Western Electric
Sewage
Manufacturing
288.6/20
                                                                     288.6/17
464.4/
   32.2
             464.4/
                27.4
0.8
                 0.13
               .035
                               5.7x10
                                                                                                                       -3
                             Cooling (TDS)
          Westminster Waste Water
            Treatment Plant
Sewage

-------
                           TABLE 7B



Discharges of Record in South Platte  River Basin  as  of 1973



        Discharges to South Platte River - Main  Stem
                                                                             Pertinent  Operations  &
Name
see Big Dry Creek enters at 288.6
Ft. Lupton Waste Water Treatment
Plant
Platteville Waste Water Treatment
Plant
La Salle Waste Water Treatment
Plant
see St. Vrain Creek enters at
270.0
see Big Thompson River enters
at 260.4
see Cache La Poudre River
enters at 249.0
WQS - Near Kersey
Crow Creek ( Intermittent)
discharges collected in
vicinty of Cheyenne, Wyo.
Great Western Sugar - Ft. Morgan
Ft. Morgan Waste Water Treatment
Plant
Brush Waste Water Treatment Plant
WQS - At Balzac
Terra Resources
Great Western Sugar (Sterling)
Sterling Waste Water Treatment
Plant
Platte Valley Rendering
Type of Facil i ty

Sewage
Sewage
Sewage






Sugar Beet Pro-
cessing
Sewage
Sewage

Sugar Beet Pro-
cessing
Sewage
Meat By-product
Processing
RM

287.6
276
273
270.0

260.4
249.0

46.5
241.7
196.2
195.2
185.6
174.0
169
150.4
148.6
150
Location
RK

462.8
444,2
439.3
434.5

419.1
400.7

396.7
389.0
315.7
314.1
298.7
280.0
272.0
242.0
239.1
241.4
Average Flow & Contaminent Affecting
MGD CMS Standards

0.8 .035 (Bacteria, Snlids)
0.1 4.39X10'3 (Bacteria)
0.1 4.39X10'3





Condenser water
10.8 .474 (BOD5, Solids, Nutrients,
Temp. )
2.6 .114 (BOD5, Solids, Bacteria)
1.1 .048 (BOD5, Solids, Bacteria)
0.022 .96X10'3
6.8 .298 Treated Process Water
(B005, Solids, N, Tenp. ,
Bacteria)
2.5 .110 (BOD5, Solids, Bacteria)
0.04 1.75X10'3 (BOD5, Solids, O&G)

-------
                                                                           TABLE  7B

                                                Discharges  of  Record  in  South  Platte  River  Basin  as of  1973

                                         Discharges  to  South Platte River  - Dry Creek  enters  Boulder Creek @  14.8


                                                                                                                                 Pertinent  Operations  &
   Name                                 Type  of Facility                 Location                          Average Flow               Pollutants  affecting
   	RM	RK	MGD	        CHS	water  quality	


   Beech Aircraft                       Mfg,  Plating, Rocket       270/14.8/15     434.5/23.8/       0.003           1.32xlO~4      (Cr)
                                          Testing                                         24.1


   Boulder Water Treatment Plant        Domestic Water             270/14.8/10     434.5/23.8/       3.15             .139
                                                                                         16.1
en
en

-------
                                                                      TABLE 7B

                                           Discharges of Record in South Platte River Basin as of 1973

                                     Discharges to South Platte River - Coal Creek enters Boulder Creek 0 7.9
Name
Type of Facility
                                                                Location
                                                            RM           RK
    Average Flow
MGD              CMS
Pertinent Operations &
  Pollutants affecting
  water quality	
Ideal Industries
                                  Cement
Louisville Wastewater Treatment   Sewage
  Plant

Lafayette Wastewater Treatment    Sewage
  Plant

Erie Wastewater Treatment Plant   Sewage
                          270/17.6/     434.5/2S.3/      0.064
                             7.9/19           12.7/30.6

                          270/17.6/     434.5/2S/3/      0.2
                             7.9/9            12.7/14.5

                          270/17.6/     434.5/28.3/      0.1
                             7.9/5            12.7/8.0

                          270/17.6/     434.5/28.3/      0.1
                             7.9/1            12.7/1.6
                                                                                                        2.8x10
                                                                                                              -3
                8.78x10
                                                                                                               -3
                4.39x10
                       -3
                4.39x10
                       -3
(ROD,-, solids,  Bacteria)
(BOD5, Solids,  Bacteria)
(BOD5,  Solids,  Bacteria)

-------
                                                                  TABLE 7B

                                       Discharges of Record in South Platte River Basin as of 1973

                              Discharges to South Platte River - Boulder Creek enters St. Vrain Creek ra 17.4
                                                                                                                   Pertinent Operations &
Name Type of Facility
Boulder Water Treatment Plant Domestic Water
Flat iron Premix
Boulder Wastewater Treatment Sewage
Plant (Pearl Street)
Public Service Company Power Gen - Coal
(Boulder)
C & M Sand and Gravel
Boulder Waste Water Treatment Sewage
Location
RM
270/17. 4/
10
270/17. 4/
22
270/17. 4/
21.3
270/17. 4/
270/17. 4/
20
270/17. 4/
Average Flow
RK MGD • CMS
434. 5/28. O/ 1.53 .067
6.1
434. 5/28. n/ 3.2 .140
35.4
434. 5/28. O/ 4. .176
34.3
434. 5/28. O/ 9.9 .435
434. 5/28. O/ 0.8 .035
32.2
434. 5/28. O/ 7.8 .342
on r
Pollutants affecting
water Quality

(BOD5> Solids)
(BOD5> Solids)
(BOD5, Solids) Discharge
to Lakes
(Solids)
(BOD5, Solids)
See Dry Creek enters @ 14.8
See Coal Creek enters @ 7.9
WQS - Boulder-Weld Co Line
                                                               17.8
270./17.4/    434.5/28.O/
        7.0            11.3

-------
                                                                                  TABLE 7B

                                                       Discharges of Record in South Platte River Basin as of 1973

                                                Discharges to South Platte River - Saint Vrain Creek enters South Platte  @  270
en
Co
Name Type of Facility
Lyons Waste Water Treatment Plant Sewage
Longmont Water Treatment Plant Domestic Water
Golden Gravel
Longmont Waste Water Treatment Sewage
Plant
Gould Filters
Great Western Sugar Co. '- Sugar Beet Proc.
Longmont
WQS - Weld - Boulder County
Line
see Boulder Creek enters @ 17.4
WQS - Downstream of Longmont
WQS - Near Mouth
Location Average Flow
RM P.K MGD CMS
270/39
270/35
270/25
270/23
270/22
270/21
270/20.8
270/17.4
270/17.2
270/1.3
434.5/62.8 0.1
434.5/56.3 1.63
434.5/40.2 0.004
434.5/37.0 3.7
434.5/35.4 0.038
434.5/33.8 7.0
434.5/33.5
434.5/28.0
434.5/27.7
434.5/2.1
4.39X10'3
7.16X10"2
1.75X10'4
.162
1.67X10"3
.307
                                                                                                                                    Pertinent  Operations
                                                                                                                                     &  Pnllutants affecting
                                                                                                                                     Water Quality
                                                                                                                                    (BOD5,  Bacteria)
            Public Service Co. (Ft.  St.  Vrain)    Power  Gen.(nuclear)   270/1.0
431.5/1.6
                                                                                                    3.0
                                                                                                                    .132
                                                                                                                                    (BOD5,  Solids,  Bacteria)
                                                                                                                                    Condenser  Water
                                                                                                                                    (BODcj,  Solids,  Temp,  Bact.)
(BOD5,  Solids,  Temp)

-------
en

 i
                                                                                      TABLE  7B

                                                           Discharges  of Record  in  South  Platte  River  Basin  as  of  1973

                                              Discharges  to South  Platte River - Little Thompson River enters Big  Thompson  River  @  7.0
             Name
                                                   Type  of Facility
                                                                                   Location
                                                                             RM
                                                                                              RK
                                                                 Average Flow
                                                           MGD                 CMS
             Johnstown  Wastewater  Treatment
             Plant
Sewage
260.4/7.0/2.
419.1/11.3/      0.2
         3.2
                                                                  Pertinent Operations
                                                                    and Pollutants
                                                                    affecting Water Quality
Berthoud Wastewater Treatment Plant

Carnation Milk Company


Great Western Sugar Company
(Johnstown)
Sewage

Evap. Milk


Sugar Recovery
i MSG Production
260. 4/7. O/
12
260. 4/7. O/
4

260. 4/7. O/
2.0
419. 1/11. 3/
19.3
419. 1/11. 3/
6.4

419. 1/11. 3/
3.2
0.2

0.05


4.0

8.78xlO~3

2.20xlO"3


.176

(BOD5, Solids, Bacteria)

Discharge to Hillsborough
Ditch; intermittent
to Little Thompson River
Condenser & Process
Water (BOD5, Solids,
                                                                             3.78x10
                                                                                                                                       -3
Nutrients, Bacteria)

(BOD5)

-------
                                                                       TABLE 7B

                                            Discharges of Record in South Platte River Basin as of 1973

                                 Discharges to South Platte River - Big Thompson River enters South Platte  @ 260.4
                                                                                                                         Pertinent Operations
Name
Controlled Stream Flow
Fish Hatchery 692, Colo. F&G,
Estes Park
Federal Facilities U.S. Rocky
Mountain National Park
Estes Park Waste Water Treatment
Plant
1 Fish Hatchery, Colo. F&G, Drake
Flatiron Paving (Loveland)
i
Loveland Packing Co.
Flatiron Sand & Gravel (Loveland)
Loveland Water Treatment Plant
Loveland Waste Water Treatment
Plant
Great Western Sugar {Loveland)
Greeley Water Treatment Plant
Type of Facility

Fish Rearing
Sewage
Sewage
Fish Rearing
Beef & Pork
Processing

Domestic Water
Sewage
Sugar Beet
Process
Domestic Water
Location
RM RK

260
260
260
260

.4/60.5
.4/60
.4/54.5
.4/42
260. 4/
260.4/25.5
260
.4/
260. 4/
260
.4/24.5
260.4/22.5
260.
4/

419
419
419
419
419
419
419
419
419
419
419

.1/97.4
.1/96.6
.1/87.7
.1/67.6
-I/
.1/41.0
-I/
-I/
.1/39.4
.1/36.2
.!/
Average Flow
MGD CMS

1.
0
0,
3
3,
0.
2
0
2
8.
0.

.8
.024
.9
.9
.0
.05
.5
.15
.7
2
12

.079
1.05X10"3
3.95X10"2
.171
.132
2.19X10'3
.110
6.58X10"3
.118
.360
5.27X10'3
& Contaminent
Standards

(BOD5,
(BOD5,
(BOD5,
(BOD5,

Solids,
Solids)
Solids)
Solids,
Affecting

N)

N)
(Solids)
Process Water
(BOD5)
(Solids)

(BOD5,
Treated
(BOD5,


Solids,
Process
Solids)


Bact.)
Water

  see Little Thompson River
    enters @ 7.0
  WQS - Near Mouth

Floyd Hoag Sand and Gravel
                     260.4/7.0    419.1/11.3

                     260.4/0.9    419.1/1.4
Aggregate
                                                                                                                         Washing

-------
                                                                         TABLE 7B

                                              Discharges of Record in South Platte River Basin  as  of 1973

                                    Discharges to South Platte River -Eaton Draw  enters Cache La Poudre River @ 6.9
Name
                                      Type of Facility
                                                                      Location
                                                                RM               RK
                                                                Average Flow
                                                          MGD                  CMS
                                                                  Pertinent Operations &
                                                                    Pollutants affecting
                                                                    Water Quality
Great Western Sugar (Eaton)
Eaton Wastewater Treatment
Plant
Sugar Beet Processing
Sewage
249/6.9/7.        400.7/11.I/     2.6
  (3 discharges)         11.3
249/6.9/6.5      400.7/11.I/     0.2
                         10.5
 .114          Condenser, Scruber
               boilers
               (BOD5, Solids, N ,
               Bacteria)

8.78xlO"3      (BOD5, Bacteria)

-------
                                       TABLE 7B



            Discharges of Record in South Platte River Basin as  of 1973



Discharges to South Platte River - Cache La Poudre River enters  South Platte  @  249.0
                                                                                         Pertinent  Operations
Name
Fish Hatchery - Rustic (Colo F&G)
WQS - upstream Ft. Collins
Fish -Hatchery Belleview Colo. FSG
Fish Hatchery Belleview Colo. F&G
Poudre Premix
Ranchway Feedmills
Greeley Water Treatment Plant
(Boyd Lake-Pcudre)
(Belleview)
Ft. Collins Water Treatment Plant
Ft. Collins Light 3 Power
Lone Star Steel
Ft. Collins tl Waste Water Treat-
ment Plant
Ft. Collins H2 Waste Water Treat-
ment Plant
Boxelder Waste Water Treatment
Plant
Terra Resources
Flatiron Paving
Winsdor Waste Water Treatment
Plant
Mountain Aggregate
Greeley Sand & Gravel
Flatiron Paving
see Eaton Draw enters @ 6.9
Weld County By Products Co.
Manfort of Colorado Packing Co.
Greeley Waste Hater Treatment
Plant
Great Western Sugar Co. (Greeley)
WQS - Hear Greeley
Type of Facility
Fish Rearing
Fish Rearing
Fish Rearing
Concerte

Domestic Water
Domestic Water
Domestic Water
Power Gen .

Sewage
Sewage
Sewage


Sewage



Dog Food
Beef 8 Lamb
Processing
Sewage
Sugar Beet Pro-
cessing
Location
RM RK
249/74
249/56.3
249/49
249/47
249/46
249/46

249/46
249/46
249/45
249/44.1
249/40.2
249/39.2
249/35
249/29
249/23
2-Js/lu
240/10
245/10
249/7.4
249/6
249/5.3
249/4.5
249/2.9
400.7/119.1
400.7/90.6
400.7/78.8
400.7/75.6
400.7/74.0
400.7/74.0

400.7/74.0
400.7/74
400.7/72.4
400.7/71.0
400.7/64.7
400.7/63.1
400.7/56.3
400.7/46.7
400.7/37.0
400.7/16.1
inn. 7/16.1
400.7/1G.1
400.7/11.9
400.7/9.6
400.7/8.5
400.7/7.2
400.7/4.7
Average Flow
MGD CHS
7.4
1.5
11.5
0.004
0.00006
.1
.6
0.7
0.31
0.03
3.9
3.9
0.3
0.009
2.8
0.15
u.26
3."
2.n
0.0004
7.0
7.5 seasonal
.325
.066
.505
1. 76X10-4
2.63X10'6
4.4X10"3
26.3X10-3
.031
.014
1.3X10"3
.171
.171
.013
3. 95X10-4
.123
6.58X10"3
12.3X1U-3
.132
.088
1.76X10'5
.307
.329
& Pollutants affecting
Water Duality
(BOC5, Solids,
(BOD5, Solids,
(BODj, Solids,

PH

pH
Temp. pH
(BOD5, Solids,
(BOD5, Solids,
(B005, Solids,
Bacteria)
N, Bact.)
N, Bact.)





Bacteria)
Bacteria)
Bacteria)
(BOD5) Bacteria)

(TDS)
(BODS)


(TDS)






(Bact.BODj)
lagoon seepage
Cooling 8 Defrost Water-
Hide flume
(BOD5, Solids,
(BOD5, Solids,
Temp, Bacteria
Bacteria)
Nutrients
)

-------
                                                                                      TABLE 7B

                                                           Discharge of Record in the South Platte River Basin as of  1973

                                                                   Discharges to South Platte River - Main Stem
                                                                                  Location
            flame
                                                   Type of Facility
                                                                            RM
                                                                                             RK
                                                                                                            MGD
                                                                                                                 Average  Flow
                                                                                                                                  CMS
Pertinent Operations &
  Pollutants affecting
  Water Quality
Crook Waste Water Treatment Facility
Ovid Waste Water Treatment Facility
Great Western Sugar Company (Ovid)


Julesburg Wastewater Treatment Plant
WQS - Near Julesburg
Sewage
Sewage
Sugar Beet Processing


Sewage

118
95.0
94.8


89.6
87.0
189.9
152.9
152.6


144.2
140.0
0.025
0.025
5.0


0.2

1.10X10"3
1.10X10'3
.220


8.78xlO"3

(BOD5, Solids)
(BOD5> Solids)
Treated Process Water
(BODc, Solids, Nutrients,
Racteria )
(BOD5, Solids , Bacteria)

CO

 I

-------
                                       TABLE 7C
                                    *
                    Summary of Major Industrial Discharges in the

                         South Platte River Basin as of 1973
Facility
Public Service (Zuni)
Public Service (Cherokee)
Great Western - Brighton
American Metals Climax -
Urad
Coors
Great Western
Ft. Morgan
Great Western
Sterling
Great Western
Longmont
Public Service -
Ft. St. Vrain
Flatiron Premix
Public Service -
Valmont
Fish Hatchery
Flatiron Paving
Flatiron Sand ft Gravel
Great Western
Loveland
Great Western
Johnstown
Fish Hatchery - Rustic
Fish Hatchery - Belleview
Flatiron Paving
Greeley Sand & Gravel
Flatiron Paving
Great Western -(Greeley)
Great Western -(Eaton)
Great Western -(Ovid)
Location
RK
511.8
502.9
475.7
500.6/78.9
500.6/30
315.7
242.0
434.5/33.5
435.5/2.1
434.5/28.0/35.4
434. 5/28. O/
419.1/67.6
419. I/
419. I/
419.1/36.2
419. 1/11. 3/
400.7/119.1
400.7/78.8
400.7/46.7
400.7/16.1
400.7/16.1
400.7/7.2
400.7/11.1/11.3
152.6
Receiving Stream
South Platte
South Platte
South Platte
Clear Creek
Clear Creek
South Platte
South Platte
St. Vrain
St. Vrain
Boulder Creek
Boulder Creek
Big Thompson
Big Thompson
Big Thompson
Big Thompson
Little Thompson
Cache La Poudre
Cache La Poudre
Cache La Poudre
Cache La Poudre
Cache La Poudre
' Cache La Poudre-
Eaton Draw
South Platte
MGD
44
6.5
2.5
8.93
23.0
10.8
6.8
7.0
3.0
3.2
9.9
3.9
3.0
2.5
8.2
.4.0
7.4
11.5
2.8
3.0
2.0
7.5
2.6
5.0
CMS
1.932
0.285
0.110
0.392
1.010
0.474
0.298
0.307
0.132
0.140
0.434
0.171
0.132
0.110
0.360
0.176
0.325
0.505
0.123
0.132
0.088
0.329
0.114
0.219
                                     Totals
For the purposes of this table,  major  industrial  discharges are  those  having discharge
volumes equal  to or greater than 0.09  cms  or  "2 MGD.
                                      -  64 -

-------
most stream and discharge confluences must also be determined by short term
surveys.  Obviously, determinations of mixing zone dimensions will  dictate
station locations for the water quality surveillance system and until  these
dimensions are known, or are specified, locations must be set tentatively.
Similarly, areas of nonpoint source discharges should be determined.

      A network comprised of seven stations is herein proposed for the main
stem of the South Platte River.  An additional six stations are considered
necessary to monitor the major tributary streams.  Station locations  and
data to be gathered are presented in Table 8. .

      It must be emphasized that the thirteen stations are derived from the
premise that they are long-term (>10 years) stations designed to show long-
term trends and major violations of surface water quality standards.   It might
reasonably be expected that an equivalent number of additional stations
would have to operate at other locations at any given time, where the purpose
of the additional stations would be to evaluate or quantify such factors
as the potential of Clear Creek as a fishery, .water quality in the lake formed
by Chatfield Dam, the source of wastes in Clear Creek, the mixing of  discharges
from sewage treatment plants and industrial facilities or the impact  of Clear
Creek on the quality of the South Platte River.  Further, the network of
stations proposed in Table 8 also assumes adequate monitoring of point source
and non-point sources of water quality degradation
                                   -  65  -

-------
                                                                            TABLE 8

                                    PROPOSED HATER 1UALITV SURVEILLANCE STATIONS FOR SOUTH PLATTE  RIVER  BASIN IN  COLORADO
Station (Description  Flow     Field      DO  Color  Common  Nutrients  Ornanics  Suspended  "Trace"    Microhio-  Biological   Fisheries   Radio-  Pesticides
and Location
South Platte River 1
9 South Platte
South Platte River 1
@ Colorado 470
Bear Creek 1
near Mouth
South Platte River 1
? Alameda Avenue
Cherry Creek 1
near Mouth
South Platte River 1
near Franklin St.
Clear Creek 1
near Mouth
South Platte River 1
near Henderson
St. Vrain Creek 1
near uouth
Biq Thompson River 1
near "outh
Cache La Poudre 1
River near Mouth
South Platte River 1
near Kersey
South Platte River 1
near Julesburg
Measurements
2 2 2

1 1 2

2 2 2

2 2 2

2 22

1 1 2

2 2 2

1 1 2

2 2 2

2 2 2

2 22

2 2 2

1 1 2

Ions
2 2

2 2

2 2

2 2

2 2

2 2

2 2

2 2

2 2

2 2

2 2

2 2

2 2


2

2

2

2

2

2

2

2

o

2

2

2

2

Solids
2

2

2

2

2

2

2

2

2

2

2

2

2

Elements
5

5

5

5

5

5

5

(1

5

5

5

5

5

logical
2

2

2

2

J

2

2

2

2

2

2

2

2


5/6

5/6

5/6

5/6

5/6

5/6

5/6

5/6

5/6

5/6

5/6

5/6

0/6


6

6

6

6

6

6

6

6

6

6

6

6

6

looical
5*

C

0

0

0

0

0

0

3"

0

0

5*

0


6

0

0

0

0

0

0

6

6

6

6

6

6

Frequency of measurements indicted thus:  0:  None                4:  Bi-monthly
                                          1:  "Continuous"        5:  Quarter! v
                                          2:  Weeklv              6:  Seasonal* (Hinh-Low Flow)
                                          3:  Monthly

Description of Measurements:   Field Measurerients:  Spec. Cond., pH, Tciim

                               Common Ions:  Si, Ca, Hq, Ma, K, HC03, C03, S04, Cl

                               Nutrients:  T-PO^, 0-Pf)4, HQ3-H, H02-«, NH3-H, TKN

                               Organics:  BOD5, COD, TOC

                               Trace Elements:   B, F, Mn, Fe, Cu, Zn, Sr, Ba, Ph, Mo, Ag, Al,  As, HO,  Se, Oil & Grease

                               Microbiological:  Total Coliform, Fecal Coliform

                               Biological:  Benthos, Pcriohyton, Bottom Sediment (Sampled Quarterly first 2 yrs, then seasonal)

                               Fisheries:  Fish, Bioassay -(Fish, ftlgal,  Invertebrate)

                               Radiological:  *  Natural P.adinnuclides, Tritium, Strontium -  90, Gamma Scan

                                             **  Tritium, Strontium - 90, Gamma Scan
                                                            -   66   -

-------
APPENDIX A
   - 67 -

-------
                           Key For Appendices
                                              Sampling Location
                                              State in which  sampling was conducted
                                              Major drainage  basin
                                              Major drainage  sub  basin
      BOULDER CR. flT
      08 CCLORflOO
      MJ550URJ flIVCR
      SOUTH FLH1TE
     -21COL001
      M
                 BUOR WELO CO LINE
                                                                   Mean,
                                                                   Mini mum Vf.li
                                                               /   from NF1C--D
                                                                   Survey
     0      700

     Tint Oflirs
     River kilometers  (main  stem and tributaries) which denote  sampling
locations occupied  by  the  National  Field Investigations Center  -  Denver
(NFIC-D) survey during the Fall  of 1971.  If no "RK" value is shown,  the
NFIC-D samples were collected at the same location as the state and  county
samples.

     If no NFIC-D data is  shown  on  graph (a dark, vertical line above the
September or December, 1971  points  on the horizontal scale) either no sample
was collected by NFIC-D or else  the sample value exceeded the upper  limit
imposed on the vertical  scale and could not be shown.
                                   - 68 -

-------
                  APPENDIX A - 1





Computer Plots of Total Coliform Concentrations vs. Time at



Long Term Water Quality Monitoring Stations in the South Platte



River
                         - 69 -

-------
 SOUTH  PLflTfE BT SOUTH PLflTTE
 oe coLOflfloo
 MISSOURI  RIVER
 SOUTH  PLATTE
 21COLOOI             77777777
   	0000  FEET
                                  OEPTH
          1969
                                 970
                                                  1971
                                                                     1972
o    toa   100   100   

1970





fy- ^
• 00 1C






I

1971




•H '/A
/I /
Jvl v









1972





\A/S/V






I
I.

5
31
O
O
X
0
•z.
c.
u.
o
o
o

o

    SOUTM  PLflTTE B83VE LITTLETON  (Hfohw./ 1(70)
    08  COLORflOO
    nJSSCURJ  RJVER
    SOUTH  PLflTTE
    21COL001             77777777
  •1 	'	OCOO  fE£T   OEPTM
                                                                                        0    5
                                                                                                                            1970
                                                                                                                                                  1971
  o    too   zoo   ?oo   tioa   goo    too   loo   too   »oo    1000   uoo   1100

  TIME OflTS

  SOUTH ."LflTTE'R BT OBRTnOUTH BVE
'  08 CO'.GP.fiCO
  M5SOUB1 PJVER 6B5JN
  SOUTH PLflTTE RIVER BSSIN
  2KOOHOP              211 1201
 _|	0000 FEET   DEPTH
                                                                                              c     100    soc    too     eoo    toao    1700   ttoo.   n

-------
 SOUTH PtBTTE B flT flLflHEOfl SVENUE
 00  COLORR08
 M;SSOURJ. RJVER BBSJN
 SOUTH PLSTTE RIVtR SflSJN
 21CODMOP             Z11120M
                     0000 FEET  DEPTH
t\
      1967
                              1969
                                         1970
                                                      1971
                                                                   1972
      700    "00
50 PLSTTE  R  •  FRflNKLIN 3T BRJOCE
08 CCLORflOO
MISSOURI RJVER 6SSJN
SOUTH  FLflTTE RIVER SflSJI
21CCOHOP              211120<1
                     0000 FEET  OEPTH
 SOUTH PlflTTE fl « 13TH ST 8RJOCE
 03 CCLOilAOO
 KISSO'JRJ RIVEB BflSJN
 SOUTH PLflTTE RIVEfl SflSTN
 Z1COOHOP             2111201
_2	0000 fEET  0
                                                                                                 700    <«00     (00
                                                                                                                          1000    t?00
 SOUTH PlflTtE BT HENDERSON
 08 COlORflOO
 njssoun.1 RJVER
 SOUTH PLflTTE
 21COL001            77777777
                     0000 fEET   DEPTH

-------
ro
 i
         a

         3
                 SOUTH Piflm  NEBfl KERSEY
                 08 COLORSOO
                 MISSOURI  RJVEfl
                 SOUTH PLflTTE
                 21C8L001             77777117
                                      0000 FEET  DEPTH
                                                                                        SOUTH PVflTTE.flT BfilZBC
                                                                                        08 COLOBflOO
                                                                                        HlSSOUflJ  RlVCfl
                                                                                        SOUTM PLflTTE
                                                                                        21COLOOI             77777777
                                                                                          	0000 FEET  OEPTH
1968
                                            1971
                                                           1972
                                                                                             1968
                                                                                                               n
                0       700

                TIME OflTS
                                                                                       0      200

                                                                                       TIME OflfS
                                                                SOUTH PI>TT£ NEBR JULES6U.1C
                                                                OB COLOflBOO
                                                                MJSSOUflJ fllVfn
                                                                SOUTH PtflTTE
                                                                21C01.001            77777777
                                                                                    0000 FEET  DEPTH
                                                                                                                                                                              1972

-------
               8ERR CREEK  PI  JErf flflflr CO U«£
               08 COLOHflOO
               BJSSOUPJ  BJVEH
               SOUTH PUflTTE
               2KOLOO!             71777717
              J4	OCOO FEET  OEPTH
CHCRBY en BT DENVER. COLO
08 ce'.op.ffoo
MJSSCUP.) P.1VC.1
CO
 I
               CLEfln CREEK  S80VE  COLOEN
               08 COLORADO
               MISSOURI RJVER
               SOUTH PLflTTE
               JKOL001             77111717
                                    0000 FEET  DEPTH
                   1963
                                 1969
                                                  19
                                                                  1971
                                                                        OK
                                                                    500.7/30,
                                                                                  1972
 CUEflR CREEK NEflfi MOUTH
 08 COLORflOO
 MISSOURI RJVER
 SOUTH PLSTTE
 21CCL001            nilim
                     0000 FEET   DEPTH

-------
ST VflflJN  BELOW 1.0NCHONT
08 COLORROO
HJSSOURJ  flJVEfl
SOUTH  PlflTTE
21COL001             77777777
                     0000 FEET   DEPTH
    100   too    loo   100    ioo   too   TOO    too   000    1000  i loo   1200   tioo
 80UUOEB CH.. ST  SLOB MELO CO LJNE
 08 COLORflOO
 MiSSO'JflJ flJVER
 58-Jln PLflTTE
 2K8L001             77777777
JJ	0000 f£ET  DEPTH
 ST. VflflJH NEflH HflUTM
 08 COLCBflOO1
 nJSSOUR] BIVEfl
 SOUTH PLflTTE
 51COL001      .      77777777
          	0000 FEET  DEPTH
                                                                                                                                                                 1972
0       ?00       VOO       <00       *00

TIME OfltS

  8IC THOM."SQN NEflR MOUTH
  08 COLOaflOO
  HISSOl'SJ K.'VES
  SOUTH PLP1TE
  2KCL001            77777777
 Jl	     _          0000  FEET   DEPTH

-------
—I
cn
                CflCME Lfl CCUOBE NEflfl  GREEUT
                08 COLOftHOa
                njssousi RIVER
                SOUTH ."UflTTe                '  .
                21COLOOI            77777777
               • >4                   0000  FEETOEP7M
                   1968
                                                                                197Z
 CBCME Lfl POUORE S80VE FT COLLJNS
 cs coLCP.nDo'
1 KJSSCUfU RJVEP,
 SCUlll PLflTTE
 21COL001            77777777
Jl	0000 FECT   DEPTH
               TIME OflTS

-------
                  APPENDIX A - 2

Computer Plots of Fecal  Coliform Concentrations vs. Time at
Long Term Water Quality Monitoring Stations in the South Platte
River
                         - 76 -

-------
 SOUTH PLflTTE fll
 08 COLOR/100
 HISSOUA) RJVER
 SO'JTH PL BITE
 21COLOOI
J4
                  SOUTH PLfllTE
                                too   100   too    sco   tcoo   noo  i?oo   nco
lint OflTS
 SOUTH PlflTTE R  fll  BOWLES flVENUE
 08 CCL'ORflOO
 nissouaj RJVER  essjN
 SOUTH PLfllTE RIVER 8SSJN
 21COOHOP              211120M
 2         	0000 fEET  DEPTH
         RIVER
SOUTH PLflTTE
Z1COLOO!
11
                       77777777
                       COOP FEET  CEPTH
                                                                                                                                              1971
                                                                                                                                                   Y
                                                                                                                                                     \
                                                                                                                                                                 '1972
                                                                                                                       loo   coo   loo   aoo   aoo   1000
                                                                                                                                                        not?   1700
                                                                                             71HE OfllfS
 SOUTH PLflTTE R  PT  OPRTMOUTH BVE
 08 COXORSOO
 MIS50URJ RJVER  8flSI«
 SOUTH PLflTTE RJVER 8SS1N
 21COOHOP            .' 2111201
_2	0000 FEET  DEPTH
                                                                                                                        1969
                                                                                                                                                  1971
                                                                                                                                                                 1972
                                                                                                                         100     1030    U

-------
 SOUTH  PlflTIE fl «T fl!.flH£Ofl SV£«U£
 00  COLORADO
 MISSOURI  RIVER ensjit
 SOUTH  PlfiTTE RJVEB SflSJN
 21COOHDP              2111201
 2           	 0000 ftE7  OE
 196
                                        1970
                                                    1971
                                                                    1972
 HUE opts
  SO PLS1TE R • FBSNK1.1N  ST  BRJOCE
  OB coLonnoo
  MJSSOUFU BIVEB flflSIN
  SOUIn PlfllTE RJVEB OflSJN
  21COOMOP             211120M
•  2	0000 FE£T   OEPTM
   1967
                             1969
                                       1970
                                                      '971
                                                                  1972
  SOUTH,PIPTTE  fl  «  I9TH ST  BRIDGE
  08 COUOBPOO
  MISSOURI  BiVEfl  eflSIN
  SOUT.l PLATTE  RIVER 6SS1«
  21CCOMDP              21112W
_2	0000  f££7  DEPTH
                                                                                                                        1969
                                                                                                                                     1970
                                                                                                                                                 1971
                                                                                                                                                       U
                                                                                                                                                             tOO    7000
UnE OflfS
 SOUTH  PUflTTE BT HENDERSON
 09  COLCRROO
 MISSOURI  RIVER
 SOUTH  FLfllTE
 21COL001             '77777777
                     COCO FEET  DEPTH
 TIME DBYS

-------
 SOUTH PlflTTE NEBfl KERSEf
 08 CCCOSSOO
 tlJSSCURJ RIVER
 scum POniE
 J1C3U001            71777777
   	0000 fEET  OtPTM
     1968
                                               1971
SOUTH PLSTTE SI BBIZBC
08 CSLCRflOO
MJ55GUnj  RJVER
SOUTH PLBTTE
21COL001             77777777
        '            0000 FEET  DEPTH
TIME OflTS
                                                  SOUTH, PLflTTE NEflR JULES8URG  '
                                                  08 COLORADO
                                                  MISSOURI RJV H
                                                  SOUTH PLflTTE
                                                  21C01.001

-------
 BESS CREEK flT JIFF SRflP CO LIKE
 OB COLORADO
 MISSOURI RJVER
 SOUTH PLflTTE
 21COLOOI            77777777
 W	0000 FEET  DEPTH
CHER/U CR fll DENVER. COLO
08 CGLtfRSOO
      1968
                     1969
                                                                   1972
line

 CLESR CREEK S80VE  GOLDEN
 08 COLORADO
 nlSSOURJ RJVER
 SOUTH PLflTTE
 21COLOOI            77777777
Jl	COOP  FEET   DEPTH
     1963
                                                                   1972
SO FLSTTE RJVER
21COOMOP             J111ZOM
2            _ 0000 FEET _ DEPTH
 ".£ OSYS

 CLEAR CREEK NEflR HOUTH
 08 COLO.-.POO
 MISSOURI 8)V£R
 SOUTH PLflTTE
 21C5L001            77777777
                     COCO FEET  OEPTC.

-------
57 VflflVN  BELOW  LONCMONT
08 CO'.ORflOO
MISSOUB;  RJVEB
SOUTH PlflTTE
21COL001             77777777
                     0000 PEE1   DEPTH
                                                                                  e>

                                                                                  3
SI. VBflJN NEflB HOU7H
OS COLOBflDO
MISSOURI BJVCS
SOUTH PLflTTE
2ICOL001
                    77777717
                    COOP fEET
                                                                                                                         DEPTH
   1968
                                                               1972
                                                                                         TJHE OPlfS
eOULOEB CB. flT BLOB MELD CO LINE
OB COLOBflDO
MJ5SOUB1 RIVEB
SOUTH PLflTTE
21COL001            77777777
M                   0000 TE£T  DEPTH
          1969
                            1970
                                             1971
                                                       n.7
                                                            1972
 B]C THCnPSON NEflR BOU7H
 08 COLORADO
 MISSOURI RIVET
 SOUTH PLflTTE
 21COL001            77777777
 M	0000 FEET  DEPTH
                                                                                                                                                              1972

-------
00
to
                CBCHE LB POUORE  BBOVE f^ COLLINS
                08 COLO>lflOO
                MISSOURI RIVER
                SOUTH PLfllTE
                21COL001             77777777
                "4	oono rtn
        10    S
                     1968
               0       200

               7JME OflYS
                                                                                 1972
                               MOO      COO      100       1090      1200     tHOO      1(00
 'CflCME Lfl Pfl'JORE NEflR CREEL 11
 03 CaLOSAOO
 r.JSSOURJ P.JVER
 SOUIti PUflTTE
 21COLOOI             77777777
Jl	0000 fEET   OEP7M
                                                                                                                 1968
0       200

TIME OfltS
                                                                                                                                                          1000      1200 '     1«00

-------
                  APPENDIX A - 3

Computer Plots of Dissolved Oxygen Concentrations vs. Time at
Long Term Water Quality Monitoring Stations in the South Platte
River Basin
                        -  83 -

-------
 SSUTM rioTTE flf
 08 COIORBOO
 Hissounj Hives
 soinn
 2ICOLOOI
                      77777777
                      0000 FEET
                                 OEPTM
                                                           1972
53','TM PLBTTE BBOVE LJULETON
08 C3I.ORBCG
MSSSL'flj RJVEB
SOUTH fljmE
JICflLCOl            77777777
                    0000 fEET   DEPTH
                                       Ii70)
TIME DflTTS
 SOUTH PLflTTE « £7  BOWLES  flVENUE
 08 COLORflOS
 MISSOURI RJVER aflSJM
 S3UTH PLSTTE RJVER  BflSJN
 2KOOMOP             Z1U20H
_|	0000  fECT   DEPTH
 auum rLHMt R ST OflRTHOUTM SVE
 OB COLORflOO
 MISSOURI RIVEfl BSSIN
 SOUTH PLflTTE RJVEP, BflSm
 J'.CCOHOP             ZIUJOI
__2	0000 fEET  OCPTfl
                                               I7C3     1KCO
                                                               If00     1100

-------
00
en
                 SOUTH PlflTTE R BT BIBMEOB BVENUE
                 OS COLORBOO
                 MISSOURI  RJVtfl 8BSJN
                 SOUTH PLflTTE RJVER BBSJN
                 21COOHO?              211I20H
                 2	   	 0000 fEET  DEPTH
                                                                                  1972
 SOUTH PLBTTE R • 191H'ST 8RJOCE
 08 COLORBBO
 HJSSOURJ  niV£R SflSJH
 SOUTH PlflTTE RJVER BBSJN
 21COOHDP              211120l<
 2	0000 FEET  DEPTH
                                                                                                                   1967
                                                                                                                                                                             1J72
                TIME
                SO PLBTTE R «  FRflNKLIN  ST  8RJOCE
                OB COUOHBOO
                MISSOURI RJVER BflSIH
                SOUTH PLBTTE RJVER eflSIN
                21CCOHOP             2111201)
                2     	0000 TEET   DEPTH
                                                                                 1972
 SOUTH PLflTTE BT HENDERSON
 OB COLORBOO,
 MJSSOUflJ RJVER
 SOUTH PLBTTE
 2ICOL001         '   77777777
J4	    0000 rEE7  DEPTH
                                                                                                                                                                              1972
                           uoa     «oo

-------
                 SOUTH PlflTTE NEBB KER5E1T
                 08  COUCKflpO
                 MISSCURJ  RIVER
                 SOUTH PIBTTE
                 2ICOL001             77777777
                 ij                    0000 FEET   DEPTH
00
cr>
                      1968
                                                                                    1972
                o       200

                11HE  OSTS
                                        •00      eoo
                                                                 SOUTH riBTTE NEfifl JULES8URC
                                                                 08 COLORflOq
                                                                 MISSOURI RJVEfl
                                                                 SOUTH PLflTTE
                                                                 21COLC01            77777777
                                                                                     0000 fECT   OEPTH
 SOUTH PLBTTE BT Bfl'-tflC
 08 COLORPOg
 MISSOURI RJVER
 SOUTH PUflTTE
 2ICOL001            77777777
                     0000  fEET   OEPTH
0       ZOO

T1HE OBITS
                                                                                                                                                     tooo   .   1200     moo      'too

-------
 BEPR CREEK B1 JEFF SRSP CO UNE
 08 C3LORBOO.
 MISSOURI RIVER
 SOUTH PLflTTE
 21COLOOI             77777777
J4	0000 FEET  DEPTH
                                                                 1972
     100    700    700

  nt OBITS
                                                           1000   1100   1X00
 CLEflR CREEK  S80VE GOLDEN
 08 COLORMO-
 nJSSO'JRI  RIVER
 SOUTH pLflm
 21COLOOI             77777777
                      0000 FEET  DEPTH
     1968
                   1969
                                    1970
                                                    1971
                                                                     1972
 CHERflr CR flT OEHVER.  COLO
 08 COLORADO
 M13SOURJ RIVER
 SO PLfl'IE RIVER
 2ICOOHOP              J11120M
 2	ocoo FEET  DEPTH
                                                                                                    700    HOO     000    100     1000   al?QO    1KOO   1COO    1AOO   7000    7200
CLEfln CREEK NEflR  MOUTM
08 COLOPflOb
MISSOURI RIVER
SOUTH flflTTE
Z1COL001             77777777
      	0000 FEET  DEPTH
                                                                                                   1968
                                                                                                                                                                    1972

-------
oo
oo
                  ST VRPJN BEIOH LONCHONT
                  08 COLORHOO
                  HISSOURJ RJVER
                  SOUTH rifllTE
                  2ICOL001            77777777
                                      0000
                                                  OEP1H
                                                                                  1972
                 a     100     ?oo    100     voo     100

                 TlflE OflTS

                 Bouiotn CB. m  BLOR HELD  co LINE
                 08 COLORflOO
                 (11SSOURI BJVtR
                 SOUTH rism
                 21COL001            77777777
                 U                   OOCO  fEET  OEFTH
 ST.  VP.3.-N NEP3
 OB coLonsao
 MJSSCL'PJ RJVEB
 SClHM TLSTTE
 2!CCLOC1
J)
                                                                                                                                  77777777
                                                                                                                                  OCCO  fCC7
                                                                                                                .   1968
                                                                                                                                                                                1972
0       203      llOO

TIME OPTS

 8JC THOMPSON  NEBR
 08 COUSHflDO
 nJSSO'JRJ R;VER

 21C3L001
 M
                     77777777
                     0000  FEET   flEPTH
                                                                                                                   1966
                                                                                                                                                                                1972
                                                                                                                                                      1100     noo

-------
00
vo
                   C«CH£  Lfl  POUORE flSOVE FT COLLINS
                   08  COLOflflOJ
                   KISSOURJ  HJVER
                   SOUTH  PLflTTE
                   21COL001             77T777T7
                   11	0000 fEtT  OE
                        1766
                  o       too

                  TIME  OflYS
                                                                                      1972
 CBCME LO POUORE NESR CREELET
 08 CCLORS50
 njssouij R;VER
 SOUTH PLBT7E
 21COLOOI            77777777
 <4	0000 TEET  OtPTM
                                                                                                                    1968
0      700

TIME OflfS
                                                                                                                                                                                 1972

-------
                  APPENDIX A - 4





Computer Plots of 5-Day Biochemical  Oxygen Demand Concentrations



vs.  Time at Long Term Water Quality Stations in the South Platte



River Basin
                        - 90  -

-------
 SOUTH ri/niE  m  SOUTH
 08 COLORAOl)
 MISSOURI RIVER
 SOUTH PLflTTE
 21COIOOI             77771777
 H.	0000 FEET   DEPTH
           700    loo    too    £00    aoo   100   aoo   500   1000   noo   1200
TIME CftfS

 SOUTH  .-IfltTE.n ST BOWLES  BVErlUE
 08 COLORfiDO
 MISSOURI  RIVER BflSlH
 SOUTH  PLBT7E RIVER BflSIN
 21CODHOP              21112011
 2 	0000  FEET  DEPTH
  SOUTH fLOTTE B80VE  LITTLETON  {Hljtw«y Ii70)
  08 COLORflOO
  HISSOUHI RIVER
  SOUTH PLflTTE
  21CCL001             77777777
 _U	^^__	0000 FEET  DEPTH
                                                                                                          700    IOC   HOO   '500   fOO   700   100   100   1000   1100   1700   1100
 TIHE OBI'S

 SOUTH rifm.£  R  B7 OflRTMOUTH BVE
 C8 COLORflDO
 HJSSOUfll RIVER  8BSIN
 SOUTH FLBT1E  RIVER'BBSIH
 21COOHOP              21112011
_2	0000 fEET  DEPTH
                                                                   1972
                                                                                                     ?nc    'toa    ceo     400    1000    1200
                                                                                                                                                   1100    1100   7300    7700

-------
TV)
                    SOUTH piflm R m fliSHEos BVENUE
                    os  COLORAOB
                    MISSOURI  RJVEP. 80S IN
                    SOUTH r'u
-------
                 SOUTH PlflTTE NEBR KERSEY
                 08 COLORSDO
                 flJSSOURI RIVER
                 SOUTH FLBTTE
                 21COL001            77177777
                 >4                   0000  FEET  DEPTH
to
CO
SOUTH P1.BTTE. flT SfiLZflC
08 COLOSBOO
HIS50URJ SJVER
SOUTH PLSTTE
2ICOLOO!            77777777
                    0000 FtCT  DEPTH
                                                                SOUTH PLBTTE NEHR JULE5BURO
                                                                08 COUOHHOO
                                                                MISSOURI RIVER
                                                                SOUTH PlSTTE
                                                                21COLOOI            77777777
                                                                                    OOCO FEET  DEPTH
                                                               Tilt 2f.T5

-------
 I

vo
                8EPB CREEK flT JEFf  flfW CO UNE
                06 COL9RSOO
                NJSSOUR1 RJVER
                SOUTH PLflTTE
                2ICOL001             71777777
                                     0000 fECT  OEP7H
                   100   200   100   VOO   190    100   TOO   100   900    1000   1100  1200  1)00
        o
               CLEfl«  CREEK BBOVE COLOEN
               08  COLORflOO
               NJSSOUfl]  BIVER
               50U1H  PLS17E
               J1COLOOI             77777777
                                   0000 FEET   DEPTH
CHERRY  in S7  OEMVEP,  CCLO
06 CCIOIWJ
K1SGOURJ PJV£R
so PLflT-E R;VEB
ZiCOO.IO.0              2111201
2                   0000 FEET  OEMH
                                                                                                                                                                      >00    2000   2200'
CLERfl CREEK NEHR MOUTH
06 CfllCRflOO
MISSOURI RIVER
SOUTH PLflTTE
21COU001          '  77777777
                    0000  FEET   DEPTH

-------
 57 VRpJN.eELOH LOKGMONT
 06 COLORBDO
 MISSOURI BIVER
 SOUTH Plum
 2IC01001             77717777
Jl	      _  	0000  fin  DEPTH
      1969
     too   too    ibo   xbo •   sbo    voo   too    tb<
     OBIS
BOULDER V.  AT BLOB UEIO CO LINE
08  COLORPOO
MISSOURI  RJVEB
SOUTH  TLflTTE
21COL001             77777777
14 _     0000 FEET  DEPTH
                                                 500    1000  1100   UOO  1100
                                                                1972
ST. VRfliN  NEBR MOUTM
08 COLOHflOu
MISSOURI RIVER
SOUTH rUBTTE
21COUOO)             77777777
1)                    0000 TEET  DEP7M
BIG THOMPSON NEBB MOUTH
08 COLORflCO
MJSSOURJ RJVER
SOUTH PLBTTE
21COL001             77777777
l|                    0000 FEET  OEPTH
                                                                                                                                     1000     1200     UOO      1*00

-------
cr>

 i
                  CflCME  LB NJUORE P80VE FT COLLINS
                  08  COLORRDO
                  MISSOURI RJVER
                  SOUTH  PL/me
                  21COLOOI            77777717
                  M	0000 fEET   DEPTH
                      tea    ?oo
                 TINE OfltS
 CflCME Lfl ROUOBE  NEBR
 06 COLORflOO
 .I.'SSOURJ RIVER
 SOUTH
 21COLOOI
J4
                                                                                                                      1968
c      too

TIME OflYS
                      77777777
                      0000 TEET
                                                                                                                                                OEC7H
                                                                                                                                                                                   197J
                                                                                                                                       tOO      600      1000     1700      1UOO      1«00

-------
                  APPENDIX A - 5

Computer Plots of Hydrogen Ion Concentrations (pi!) vs. Time
at Long Term Water Quality Monitoring Stations in the South
Platte River Basin
                         - 97  -

-------
 SOUTH  PLBTTE BT SOUTH PLflTTE
 08 COLOHROO
 BJ530URJ  RIVER
 SOUTH  ri.B'KC
 21COL001              77777777
 <4 	0000 FEET   OCPTH
          I9W
                                1970
                                                   1971
                                                                    1972
0    tOO   700   109   HOO   100    tOO   700   »00   tOO   1000  1100   1700  1100

TIME OflfS

 SO. PLRTTE R RT LITTLETON. COLO   (Bowles Avenue)
 08 COLOHBDO
 MISSOURI RIVER
 SO PLBTTE'RIVER
 2ICOOHOP              211I20U
 2	0000 FEET  DEPTH
        1968
 L
                          1969
                                            1970
                                                              1971
                                                                            1972
                   wo       eoo
                                                1000      1200
 SOUTM PLBTTE RBOVE LITTLETON  (Highway l<70)
 00 COLORADO
 HIS50UH1  HJVER
 SCU'H PLBTTE
 21COL001              77777777
   	.	0000 fEET  DCPTH	
                                                                                                           1969
                                                                                                                               1970
                                                                                                                                                   1971
                                                                                                                                                                      1972
0    100   ZOO   tOO   KOO   £00   fOO   700   BOO   900   1000  1100   1200  1700   1*00

TJME OflYS
               •   - - - - - -                                                Od. /
 SO. PLBTTE R RT ENGLEHOOB, COLO   (Dartmouth Ave.)
 08 COLORHDO
 MISSOURI  RIVER
 SO PLflTTE HIVEH
 2IC03HDP  •             2111201)
 2   	   	0000  FEET  DEPTH	
                                                                                                                                                                             1972
                                                                                                       too     1100
                                                                                                                      (100     BOO      1000     IfOO     UCO     1000     IIOO    7000

-------
 SO.  PLBTTE R BT DENVER.  COLO   (Alemeii» Ave.)
 08 CO'.OHBDO
 MISSOURI RIVER           ''
 SO PLBTTE, RIVER
 JiCOOriOP              JI11JOU
 2                   0000 FEET  DEPTH
        1967
                      1968
                                   1967
                                                1970
                                                              1971
                                                                         1972
TIM
      too     «oo     BOO     eoo      IOQO     izi

     DATS
                                                  1100    l»00    l>00     2000
     Sf.iVXI  Sl/CR  HRiI/:
     -;M  PLIII'  si/ia HI.JIN
     .••:'•:.•:?              3n:  -i
       1967
1968
1969
                                                    /;i
                                                     '.".'< /L
1970
                                                           RK
1971
1972
                                                                           SO. PLRTTE  R  BT  DENVER.  COLO  <19th Street)
                                                                           08 CCLOSaCO
                                                                          ' MISSOURI RIVER
                                                                           SO PLflTTE RIVER
                                                                           21COOHGP              ZltlZIV
                                                                           2	0000 FEET  DEPTH	
                                                                                                              I
                                                                                                                   1968
                                                                                                                               1969
                                                                                                                                             1970
                                                                                                                                                           1971
                                                                                                                                                                      1972
                                                                                                           »co     ebo     »oa     iboo     izoo    liioo    ISM     laoo
                                                                          TIME OBTS

                                                                           SOUTH PlflTTS  PT  MENOERSOU
                                                                           08 COLORADO
                                                                           HlSSOUni RIVER
                                                                           SOUTH riflTTE
                                                                           S1C3L001             77777777
                                                                           H	0000 FEET  DEPTH
                                                                                                     1968
                                                                                                                   1969
                                                                                                                                   1970
                                                                                                                                                  1971
                                                                                                                                                                 1972
                                                                                                                       "00       S03

-------
                  SOUTH  PUBTTE NEBR KERSEY
                  08  COL8HBOO
                  MISSOURI  RIVER
                  SOUTH  PLBTTE
                  21COL001             77777777
                 J4	0000 FEET   DEPTH
 SOUTH PLBTTE BT 8BIZBC
 08 COLOflflDC.
 HJSSOUni HJVER
 SOUTH PUBTTE
 21COLOOI            77777777
         '	0000  FEET   DEPTH
o
o
                       1968
                                      1969
                                                     1970
                                                                    1971
                                                                                     1972
                                                                                                                    1968
                                                                                                                                   1969
                                                                                                                                                   1970
                                                                                                                                                                    1971.
                                                                                                                                                                                   197Z
                t       too
                TIME  OBTS
o   .    :oo

TIMF POYS
                                                                                                                                                                          t«00      UOO
                                                                  SOUTH PLBT7E  NEflR JULESBURC
                                                                  08 COi.ORflDO
                                                                  niSSOURj' RIVER
                                                                  SOUTH PLB1TE
                                                                  21COLOOI             77777777
                                                                                       0000 f£ET  DEPTH
                                                                       1968
                                                                                       1969
                                                                                                       1970
                                                                                                                       1971
                                                                                                                                       1972

-------
BEflfl CREEK BT JEFF BRBP  CO  DUE
08 COLORBOO
HJSSOURJ RIVER
SOUTH PLBT1E
21COL001            77777777
  	0000 FEET  OEPTM
     1968
                    1969
                                   1970
0       700      tOO      *00      100

TIME OflYS

 CLEBR CREEK BBOVE GOLDEN
 08 COLOflflOO.
 M15SOURJ RJVEH
 SOUTM PLBTTE
 21COU001             77777777
 M 	0000 FEET  DEPTH
    1963
                  1969
                                 1970
                                                 1971
                                                                 1972
                                                                 1972
                                                                                            CnCHSir  CB n~  DENVER.  CC',0
                                                                                            c
                                                                                                                o^-ir1 ret:
                                                                                                 1967
                                                                                                               1968
1969
L
,* i ''•• :
'^~ \ ' ''i\J
'/4t'V

1970

''kit
' • ' i
f ' •

1971



i'



A
T
*

1972
"•--I

                                                                                            ClEflfl CREEK NEBR BOUTM
                                                                                            08 CCLORfiHO
                                                                                            nissouni RIVER
                                                                                            SOUTH PlflTTE
                                                                                            2ICOL001         '   77777777
                                                                                                                COOP  FEET   OEP7M
                                                                                                  1968
                                                                                                                  1969
                                                                                                                                 1970
                                                                                                                                                   1971
                                                                                                                                                                1972
                         903       100
                                                                                                                                      10-10      1)00      11PC

-------
o
ro
                  57  VRB1H 8ELOM LONGHON7
                  08  COLORADO
                  MISSOURI RIVER
                  SOUTH riflm
                  2IC01001            77777777
                                      0000  FEE7   OEP7H
                   1969
                                    1970
                                                             1971
                                                                                   1972
                 0      100     100    300   • 1.00     500

                 TIME OflYS

                  BOULDER Cn. ftl BLOR  UELO  CO  LINE
                  oa coLonflsa
                  MISSOURI BJVEfl
                  SOUTH PLflTTE
                  2ICOL001             77777777
                  M  	  	0000  FEET  OEP7M
                      1966
                                                      1970
                                                                            RK
                                                                        k. 5/28.0/11
                                                                        1971
                                                                                        1972
 57. VflSJN  NEfld KOU7M
 08 CGLCHSDO
 Mjsscua; RIVER
 SOUTH TLflTTE
 21COL001
                      77777777
                      COCO fEE7
                                                                                                                    1968
                                                                                                                                    1969
                                                                                                                                                     1970
                                                                                                                                                                     1971
                                                                                                                                                                                    1972
Tlr.E OflYS

 9IC 7HOMPSON NEPR MOU7M
 08 COLORHOO'
 nlSSOURI RIVCR
 SOUTH PLBT7E
 21CDLOOI         '   77777777
 M	0000  TEE7
                                 OEP7j1_
                                                                                                                    1968
                                                                                                                                     1969
                                                                                                                                                    1970
                                                                                                                                                                   1971
                                                                                                                                                                                   1972

-------
                  CACHE LR POUOHE B88VC  FT  COLLINS
                  08 COLORflOO
                  MISSOURI RIVER
                  SOUTH PL/THE
                  21COL001            71177777
                                      0000  FEET  DEPTH
o
CO
                       1968
                                       1969
                                                     1970
                                                                      1971
                                                                                     1972
 CBCHE Lfl "POUDflE  N£BR CREELET
 08 COLOPROC
 nISSCUfll RIVER
 SOUTH PLPTTE
 eiCOLOOl             77777777
Jt	0000 FEET  DEPTH
                                                                                                                     1968.
                                                                                                                                    1969
                                                                                                                                                    1970
                                                                                                                                                                       WO.7/0.1
                                                                                                                                                                     197t
                                                                                                                                                                                     1972
                0       YOO

                TIKE  OflTS
0       190

TIME OflTfS
                                                                                                                                «00      «00       *04       1000

-------
                  APPENDIX A - 6

Computer Plots.of Temperature vs.  Time at Long Term Water
Quality Monitoring Stations in the South Platte River Basin
                        - 104 -

-------
o
(Jl
                  SOUTH PLSTTE  ST  SOUTH PLflTTE
                  08 COLORflOO'
                  nissouflj nivcn
                  SOUTH PLflTTE
                  21COLOOI             71777777
                  If	0000 FEET  OEPTH
 SOUTH PLBTTE S80VE  LITTLETON  (mshw.y 1.70)
 08 COLORflOO
 MISSOUBJ RIVIB
 SOUTH PLflTTE
 21COLOOI             77777777
                      0000_fEE7   DEPTH
                 0    100   too   700   too   500   MO   700

                 TIKE OPTS
                                                              900   1000   1100  1700  1100  11CO
                   SOUTH fLflTTE B BT 60MLES RVENUE
                   08 COLORflOO
                   MISSOURI  B1VER BflSIN
                   SOUTH PLflTTE MV£R 8BSIN
                   21COOHOP              2I1120U
                   2 	0000 FEET  OEPTH
                          1970
                                                                           1972
TIME OflTS

 SOUTH PLfllTE B BT DARTMOUTH BVE
 08 COIORROO
 MISSOURI RIVER 8SSIN
 SOUTH PLflTTE BJVEB 6HSIN
 21COOHOP             2UI20M
 3  	•	0000 TEET  OEPTH
                                                                                                                       1970
                                                                                                                                                                       1972

-------
                  SOUTH PIBT1E R B7 fllflHEOfl flVENUE
                  08 COLORflOO
                  MISSOURI RIVCR BBSIN
                  SOUTH PLB77E RIVER BBSIN
                  21COOHOP             21U20H
                  2	0000 fEET  OEP7H
o
CTi
                            1970
                                                                              1972
                      onrs

                  SO  PlflTU  n « FP.flNKLIN 57 BRIDGE
                  08  COLOBROO.
                  njssounj RIVER BBSIN
                  SOUTH  PLflTTE RJVER BflSIN
                  21COOMOP              21 I 1201
                  2	0000 TEET  OtPTH
                           1970
 SOUTH PLSHE R o  1S7H  57  BRIDGE
 00 COlORflOO
 nissouni RIVCR BASIN
 SOU7H PLB77E RJVER 8flSI«
 21COOHOP             211120U
 2	0000  FEC7  0
                                                                                                                                                                        1972
o      too    too    )oa    iioo    soo

TIME OflYS

 SOUTH FLB77E B7 HENDERSON
 08 COLORflOO
 MISSOUP.I RiVtR
 SOUTH PLB7TE
 21COL001            71777777
JJ	0000 FEET  OEP7H
                                                                                                                  1963
                                                                                                                                                                              1972

-------
 I

K-*
O
SOUTH PLflTTE MEPR KEBSET
08 COLQRflOO.
MISSOURI RJVER
SOUTH PIBTTE
21COL001             77777777
II                    0000  FEET  DEPTH
                                                                                                               5CUTM PLH7TE.  BT  SflllflC
                                                                                                               06 COLCaPOC
                                                                                                               HISSOUBJ  BIVER
                                                                                                               SOUTH PLBTTE
                                                                                                               21COIOCI             77777777
                                                                                                               H                    0000 FEET  DEPTH
                                                                                                                                                               1972
                                                                                                   zoo
                                                                                                 nave
                                                                                                            too   -   too       BOO      looo      tzo0      uoo     tioo
                                                 SOUTH PLHTTt NEBrt JULESBUflC
                                                 08 COLOnflOO
                                                 HISSOURJ RIVER
                                                 SOUTH FLfllTE
                                                 21COL001            77777717
                                                J)	0000  fEET   DEP7M
                                                                                                  17CO      1*00     1*00

-------
o
oo
                     8EPR CREEK ST JEFF  flfldr CO UNE
                     08 CCLCRPOO
                     nJSSOUR! RIVER
                     SOUTH PI.P77E
                     21COL001             77771777
                     M                    0000 FEET  DEPTH
                        too   too  100   noo   SOD   tea   100   loo  too   1000  1100  1:00  1100  tuoo
CLEflR CREEK  RBOVE  COLOEN
OB CCLORflOO
MISSOURI RIVER
SOUTH PLPTTE
ZICO'.OOI             77777777
                     0000 FEET  OCP7M
                                                                                              CHERflT CR P^ DENVER.  COLO
                                                                                              OS COLOflWS
                                                                                              r.JSSOU.^1 RIVER
                                                                                              SO P!.flT7E RIVER
                                                                                              21COOMOP              2I1!20'J
                                                                                              2	0000 FEET
                                                                                                          X
                                                                                                                                                    OEPTM
                                                                                                                             1970
                                                                                                                                                                               1972
                                                                                                                  TIME  DfllfS

                                                                                                                     CLEflR CREEK NEOR HOU7M
                                                                                                                     08  COLORHOO
                                                                                                                     MJSSCUfU RIVER
                                                                                                                     SOUTH PLflTIE
                                                                                                                     21COL001       '     77777777
                                                                                                                               	0000  FEET   OiPTH
                                                                                                                           t>68
                                                                                                                                                                                          1972

-------
o
IO
                   57 VflflJM 8ELOW LONG.10N7
                   08 CCLORflOO
                   MISSOURI RIVER
                   SOUTH plBTTE
                   21COL001            77777771
                  ji	OODO  rm   DEPTH
                    1969
                                                                                 1972
                  o     too    zao    100    400    SM    too    "700    too    BOO     1000   uoo

                  TIME OflYS

                   80ULOEB Cfl. f-l 8LOR WELD CO LINE
                   08 COLCflflOO
                   MISSOURI  BIVEB
                   SOUTH  PLBTTE
                   Z1COLOOI             77777777
                   M                    0000 FEET  DEPTH	
                        1966
                                                                                      1972
 ST.  VRflJN NEflH
 08 COLOR/160
 MJSSOUR) HJVEfl
 SOUTH PLBTTt
 21COL001
                     77777777
                     0003 T£E7   DEPTH
BJC •;HO,".°SON NESP. MOUTH
08 COLORf!00
MIS50URJ RIVER
SOUTH fLPTTE
21COLOOI          '   77777777
I)                    0000 FEET  DEPTH
                           too

                        CflfS

-------
o
 I
                   CSCHt  tB POUORE S80VE fT COLLINS
                   09  COL08SOO
                   MISSOURI  R/VER
                   SOUTH  PLB7TE
                   21COLOOI             77777777
                   W         •	0000 F££7  OtPTH
                         1968
                   0'      >og

                   7JHE  OflTS
                                                                                     1972
                                                           IOM      1T00      UOO     1IM
 CRCME LB POUOUE NEBR CREELET
 08 C0l0flfl30
 nissouni RJVER
 SOUTH rUflTTE
 21COL001            77777777
 >4 	0000 FEET  OEP7M
                                                                                                       UJ   ^
                                                                                                                    19M
0      ZOO

TIME OBITS
                                                                                                                                                                                 1972
                                                                                                                                                                       moo     UM

-------
                  APPENDIX A - 7





Computer Plots of Nutrient Concentrations vs. Time at Long Term



Water Quality Monitoring Stations in the Main Stem South Platte



River
                        -  Ill  -

-------
                   SOUTH PIS7TE «T SOUTH
                   08 COUORflOO
                   Hissoimj nivcn
                   SOUTH PlflTTE
                   mflLOOl            7777">777
                                       0000  FECT   OEPTH
PO
                                                               «o    000    1000   1100   isco
                  TJHE OfltS
                                                                  SCUTH PISTTE flT  HEHOERSCN
                                                                  08 COLORPbo
                                                                  MISSOURI  nmn
                                                                  SOUTH PLflTTE
                                                                  21COL001             77777777
                                                                  14                    0000 fEET  DEPTH
SOUTH PLflTTE  A80VE UTUETOM   (Highway (.70)
08 COLORflOO
nissouni 'RIVER
SOUTH PLPTTE
2ICOL001             77777777
                     0008 fEET  DEPTH
                                                                                                        o    w
                                                                                                                    100    200

                                                                                                               TJHE OflTTS
                                                                                                                                                  •00    100    693   aM    1000    1100    1200
                                                                                                                  looo       I'oo

-------
 SOUTH PlflTTE  NEflR KERStT
 08 COLOBPOO •
 flJSSOURJ RJVER
 SOUTH PIRTTE
 21C8i.001             77777777
J<	0000 fill   OEPIH
0   100  200  100  103

line DAYS
                                                                   1972
                                                                                               SOUTH PlflTTE Htm JULES8UBC
                                                                                               06 COLORfiQO
                                                                                               MISSaURJ RJVER
                                                                                               SOUTH PLBTTE
                                                                                               21COL001            77777777
                                                                                               V	0000  FEET  DEPTH
                                                                                       -x.   ^
                                                                                                                                                                 1972
                                                                                                  ico   200   loo  MOO   ioo   no   100   eoo

                                                                                                 C  OfltS
                                                                                                                                           BOO   looo  1100  uoa  i«o  mo*

-------
                     P7 SOOTH nsnt
        08 COLORflOO
        HI ssou'sr RIVER
        SOUTH PI.ST7E
        21COL001            77777777
        >J    	         0000  FEET   OEP7H
?    :
 SOU1M PIOT7E flSDVC
 08 COLORflQO
 HJSSOUBJ RIVER
 SOU1H PUflTTE
 21COL001
_M
                                (Highway 470)
                      77777777
                      oooo TEET
                                                                                                                                    OEP7H
                                                                                                                                     1970
                                                                                                                                                          1971
                                                                                                                                                                          1972
       0    100    700   100    100    500   «00   100    «00   *00   1000   1100   1700

       7JHE OfllfS
7JHE OR13
                                                        SOUTH PLflTTE  m  HEHOERSON
                                                        OS COLOBfldo
                                                        MJS50URJ RJVER
                                                        SOUTH PlfllTE
                                                        21COL001             77777777
                                                                             0000 FEE7  OCPTll

-------
en   •
 i
SOUTH n.«m  NESR
08 COLORADO
nissouflJ  fuvtn
SOUTH PlflTTE
21COIOOI
M
                                          77777717
                                          0000  FEtT
                                                                                      1972
SOU1H PlfllJE  HERB JULES8URG
08 COLORfiCO
flJSSOURJ  RJVER
SOUTH PLflTTE
21COU001             77777777
M	0000 TEET
                                                                                                                                                                                       1972
                    1JHE  OflfS
                                                                                                                   0    109   290   1«9   100   500   100   100   ^90   400   1000  1100  1790  1?6»   1*100

                                                                                                                   TIME Oflirs

-------
        SOUTH  PlflTTE »T SOUTH PLflTTE
        08 COLORADO
        HJSSOURJ  BJVEB
        SOUTH  PLBTTE
        21COUOOI             77777777
       Jl	0000  fCET  DEPTH
0    S
                                          1970
                                                               1971
                                                                                1971
SOUTH PUflTTE flBOVE LJT71C70N  (Hlghwy I|70)
03 COLORADO
r.jsseuRj
souin
Z1COL001             77717777
                     0000 FEET   DEPTH
       0    tCO    200    100    1400    SCO    100   100   «00    000    1000   1100   1700

       Tint OPTfS

                                                      SOUTH  PLflTTE flT HEHOER5CN
                                                      08 COLORR00
                                                      HJSSOUflJ  RJVEfl
                                                      SOUTH  PlflTTE
                                                      21COL001             77777777
                                                      H                	0000 FEET   OEPTH
                                                                                                            tOO    700    100    1100    SOO    100    100    «00    909    tOOO    \IOO    1200
                                                                                                                        1972

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SOUTH rlflTT£  Ntflfl KERSEY
06 COLORADO
flJSSOURJ  HJVEn
SOUTH PlflTTE
Z1COL001             77777717
              	0000  fEET   OEPTM
                                                                   1972
SOUTH PLflTTE  NEflS JULESBURC
08 COLOflflOa
MJSSOU8J  RIVER
SOUTH PLflTTE
JKCLOOi             77777777
                     0000 FEET   DEPTH
        790

    n«TS
                 «|QO       409        *00       1000       1700
                                                                                                   100   700   100   HOO   500   «e9   100    600   900   1000  1100   1700   1100  11100

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                                   TECHNICAL REPORT DATA
                            (Please read Instructions on the reverse before completing)
 1. REPORT NO.
  EPA-908/2-74-002
                                                           3. RECIPIENT'S ACCESSION>NO.
 4. TITLE AND SUBTITLE
  Summary Report on the Long  Term Water Quality of the
  South PLatte River Basin  1966-1972
             5. REPORT DATE
             August 1974 - Preparation
             6. PERFORMING ORGANIZATION CODE
7. AUTHOR(S)

 John  E.  Hardaway and Robert 1.  Fox
                                                           8. PERFORMING ORGANIZATION REPORT NO.
              S&A/TIB-19
9. PERFORMING ORG'\NIZATION NAME AND ADDRESS
                                                           10. PROGRAM ELEMENT NO.
  Technical  Investigations  Branch
  Surveillance & Analysis Division
  U.S.  Environmental Protection  Agency, Region VIII
  Denver, Colorado  80203
             11. CONTRACT/GRANT NO.
 12. SPONSORING AGENCY NAME AND ADDRESS
                                                           13. TYPE OF REPORT AND PERIOD COVERED
                                                            Summary  1966-1972	
                                                           14. SPONSORING AGENCY CODE
 15. SUPPLEMENTARY NOTES
 16. ABSTRACT
  An  analysis of water quality data from twenty-one water quality surveillance  stations
  located in the South Platte  River Basin of Colorado  was conducted.  The data  collected
  from 1968 through 1972  indicate significant deterioration of surface water  quality in
  the Denver Metropolitan Area.   Total and Fecal Coliform concentrations have increased
  by  two to three orders  of magnitude in recent years  along with increased  BODs concen-
  trations, and Dissolved Oxygen concentrations have sometimes dropped below  acceptable
  limits (<5 mg/1).  The  analysis indicates a need to  improve water quality with respect
  to  these parameters in  order to achieve proposed water  quality objectives.  A monitor-
  ing system is proposed  to improve data reliability and  provide information  on pre-
  viously undefined variables.
                                KEY WORDS AND DOCUMENT ANALYSIS
                  DESCRIPTORS
b.IDENTIFIERS/OPEN ENDED TERMS  C. COSATI Field/Group
  Standards, Objectives,  Parameters, Moni-
  toring, Wastewater Discharges,  Data Vari-
  ability, Analysis Techniques
 Surface  Water Quality,
 Surveillance Stations,
 South  Platte River
 3. DISTRIBUTION STATEMENT

  Release to the Public
19. SECURITY CLASS (ThisReport)
   Unclassified
21. NO. OF PAGES
     117
                                              20. SECURITY CLASS (Thispage)
                                                 Unclassified
                                                                         22. PRICE
EPA Form 2220-1 (9-73)

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