United States Region 8 EPA-908/3-78-001
Environmental Protection 1860 Lincoln Street August 1978
Agency Denver, Colorado 80295
Water
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GUNNISON COUNTY
STREAM WATER QUALITY STUDY
By
Charles B. Rumburg
BerthaAnn H. Gery
Kenneth Butcher
Contract Number 68-01-3589
Project Officer
Terry Anderson
Water Division
Denver, Colorado 80203
This study was conducted
in cooperation with:
Colorado State University Mountain Meadow Research Center
and Gunnison County, Colorado
Gunnison, Colorado 81230
WATER DIVISION
U.S. ENVIRONMENTAL PROTECTION AGENCY
DENVER, COLORADO 80203
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DISCLAIMER
This report has been reviewed by the Regional Office, U.S. Environmental
Protection Agency, and approved for publication. Approval does not signify
that the contents necessarily reflect the views and policies of the U.S.
Environmental Protection Agency, nor does mention of trade names or
commercial products constitute endorsement or recommendation for use.
Document is available to the public through the National Technical
Information Service, Springfield, Virginia 22161.
ii
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FOREWORD
The generally high quality of the water in the streams of Gunnison County,
Colorado contributes to the health, prosperity and happiness of many thousands
of individuals, both residents and visitors. Countless other thousands down-
stream depend upon Gunnison water. Maintenance of high quality will be
difficult in the face of increasing pressure from urbanization, mining, tourism
and other forces. Such maintenance is based upon knowing exactly what is the
current water quality - the subject of this research.
The Colorado State University Mountain Meadow Research Center is involved
in improving management of irrigation water. The Center has been privileqed to
render public service in cooperating with Gunnison County and the U.S.
Environmental Protection Agency in conducting the base line studies of water
quality described in this report.
Eugene G. Siemer
Superintendent and Professor
Colorado State University
Mountain Meadow Research Center
i i i
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ABSTRACT
This research is intended to establish base line water quality for the
major streams in Gunnison County.
The study involved thirty-two stations sampled seasonally, monthly, or
semi-monthly and evaluation of water quality parameters including: DO, BOD5,
total coniform, fecal coliform, fecal streptococcus, Ca, Na, K, Mg, B, SO4 ,
F", CI-, NH3-N, NO3-N, P043-P, TKN, Al, As, Cd, Cr, Cu, Fe, Mn, Pb, Zn,
temperature, velocity, pH, suspended solids and conductivity.
Data available to the County through STORET and several other studies
were retrieved and catalogued to provide background and supplemental information.
Insofar as analyses permitted classification, and with seven exceptions,
sampled stream segments met the criteria of the 1974 Colorado State Classifica-
tion An, or the 1978 classes Cold Water Biota Class 1, Domestic Water Supply
Class 2, Recreational Class 1, and Agricultural. Principal exceptions were
to:
a. biological parameters, pH values and dissolved ammonia during warm
weather, and,
b. metal parameters in the Keystone Mine area of Slate River and Coal
Creek.
This report is submitted in fulfillment of EPA Project WA75-R577 and Grant
68-01-3589 by Colorado State University Mountain Meadow Research Center in
cooperation with Gunnison County. This report covers the period January 1,
1977 to December 31, 1977 and work was completed as of August, 1978.
iv
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CONTENTS
Foreword iii
Abstract iv
Figures vi
Tables vi i
Abbreviations and Symbols viii
1. Introduction 1
2. Conclusions and Recommendations 2
3. Study Area and Sampling Sites 3
Watercourses Studied and Land Use 3
Locations of Sampling Sites and Frequency
of Sampling 4
4. Experimental Procedures 10
Parameters Studied and Analytical Procedures . . 11
Parameters Not Studied 13
Data from Other Sources 13
Classification Procedures 14
5. Results 16
Classification of Water Quality Sampling Sites . 16
Parameters of Water Quality 23
Problem Areas 30
Appendix A 31
References 85
v
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IIGURES
Number
1 Station locations, Base Line Study
2 Sites Reported in STORET
APPENDIX FIGURES
A-l
Dissolved Oxygen Content .
A-2
Biochemical Oxygen Demand . .
A-3
Total Coliform
A-4
Fecal Coliform
A-5
Fecal Streptococcus . .
A-6
Temperature
A-7
pH . . ...
A-8
Conductivity ...
A-9
Suspended Solids . .
A-10
Velocity .
A-11
Ammonia Nitrogen Content
A-l 2
Nitrate Nitrogen Content .
A-l 3
Phosphate Phosphorus Content
A-l 4
Total Kjeldahl Nitrogen Content
A-l 5
Sodium Content .
A-16
Potassium Content
A-17
Calcium Content . .
A-18
Magnesium Content .
A-19
Sulfate Content
A-20
F1uoride Content .
A-21
Chloride Content . .
A-22
Boron Content
A-23
Aluminum Content
A-24
Arsenic Content
A-25
Copper Content
A-26
Iron Content
A-27
Manganese Content
A-28
Zinc Content ....
VI
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TABLES
Number Pa9e
1 State of Colorado Water Quality Standards 15
2 Classification of Stream Segments Included in the
Base Line Study 17
3 Classification of Stream Segments from STORET Data ... 19
APPENDIX TABLES
A-l Biological Parameters 32
A-2 Physical Parameters 34
A-3 Nutrient Content 36
A-4 Mineral Content - Water - Part I 38
A-5 Mineral Content - Water - Part II 40
A-6 Heavy Metal s - Water - Part I 42
A-7 Heavy Metals - Water - Part II 44
A-8 Mineral Content - Sediment 74
A-9 Heavy Metals - Sediment - Part I 76
A-10 Heavy Metals - Sediment - Part II 78
A-l1 Average Parameter Values, Gunnison County STORET Data . . 80
vii
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LIST OF ABBREVIATIONS AND SYMBOLS
ABBREVIATIONS
SYMBOLS
BOD
- biochemical oxygen demand
Ag
-
silver
C G
- campground
A1
-
aluminum
COD
- chemical oxygen demand
As
-
arsenic
col/100 ml
- colonies per 100 milliliters
B
-
boron
DO
- dissolved oxygen
Ca
-
calcium
FS
- fecal streptococcus
Cd
-
cadmium
FTU
- formazin turbidity units
Cl"
-
chloride
MBAS
- methylene blue active substances
Cr
-
chromium
mg/1
- milligrams per liter
co2
-
carbon dioxide
xg/i
- micrograms per liter
CO32
-
carbonate
-c
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INTRODUCTION
Traditionally the 3,200 square mile area of Gunnison County, located
within the mountains of west-central Colorado, has been largely agriculture-
oriented, with forests, rangeland and irrigated meadows covering most of the
land. Coal and precious metal mines were numerous during only the first
twenty years of settlement and the few communities that did exist had small
populations. The one million acre feet of water produced per year in the
Upper Gunnison River sub-basin and other streams in the County were reputed
to be fairly pure except during the time when late spring run-off of snowmelt
occurred.
Forces are now coming into play which will significantly alter the
nature of the County and its water supply. Major deposits of molybdenum and
uranium are now under development, and large coal reserves are likely to be
developed in the near future. Increased recreational activity and incipient
mining are already significantly increasing the area's population. These
forces will tend to degrade water supplies unless extreme care is exercised.
Gunnison County planners foresaw a strong need to determine the base line
levels of water quality in advance of more development. Earlier studies,
though fairly numerous, tended to be scattered and fragmentary and to deal
primarily with point-source pollution.
The County procured federal assistance and contracted with Colorado
State University to conduct research to meet the need for data - the research
considered in this report.
The specific purposes of this research were:
1. To repeatedly determine the water quality of all major
Gunnison County streams during one calendar year, 1977.
Quality was assessed in terms of a large number of
biological, chemical and physical parameters.
2. To determine which streams fell short of acceptable
standards for water quality.
3. To review existent literature and other pertinent water
quality data, and to integrate the information with
conclusions from this 1977 research.
1
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CONCLUSIONS AND RECOMMENDATIONS
CONCLUSIONS
Base line research studies conducted at thirty-two sites upon the streams
of Gunnison County during 1977 indicate the general high quality of the water.
Forty-one percent of the sites met the 1974 A] standards. Thirty-four percent
of the sites showed excessive fecal streptoccus during May and June, prohibiting
the A-i classification. Twenty-five percent of the sites were classified B-| .
According to the proposed 1978 standards, fifty-nine percent of the sites met the
Cold Water Biota Class 1 criteria; twenty-five percent of the sites missed this
classification by slightly excessive concentrations for one parameter of water
quality - aluminum, ammonia or zinc. Nine percent of the sites had two parameters
in excess. Seventy-five percent of the sites met the criteria for classification
as Domestic Water Supply, Class 2; sixteen percent of the sites missed this
classification because of one parameter in excess (manganese), while one site (3%)
had two parameters in excess (manganese and fluoride). Two sites (6%) met only
the less restrictive criteria for recreational and agricultural use. Numerous
sites showed high values for biological parameters, pH and dissolved ammonia during
May and June, primarily.
Miscellaneous, previously-conducted water quality studies generally confirmed
the high quality of county streams, but low levels of dissolved oxygen were noted
on occasion, as well as excessive amounts of lead, zinc, mercury, sulphate, iron,
manganese and ammonia at some sites, at some times. These studies frequently
concerned point-source pollution. Significant deviation from high water quality
occurred only in the area of the Keystone Mine drainage on the Slate River and
Coal Creek; mine effluent has been reduced since collection of these data.
RECOMMENDATIONS
There should be some program for continuous spot-checking of Gunnison county
streams in order to detect the onset of possible degradation.
Potential point-source and non-point-source pollution should be identified;
corrective measures should be taken, where fiscally possible.
The summer rise in the level of biological pollutants should be studied in
depth in order to determine probable sources, the significance of it, and whether
stream improvement can or should be achieved. Specifically, we should study the
possible pollution of streams by run-off from grazed lands; management procedures
might possibly be developed to lessen pollution.
Additional work to evaluate base line levels of molybdenum and radioactive
substances should be conducted, to supplement that already available.
2
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STUDY AREA AND SAMPLING SITES
WATERCOURSES STUDIED AND LAND USE
Waters of all rivers and major creeks in
determine their water quality in this study,
by drainage in the following information; in
direction of flow are indicated. The primary
also given in the following:
Tomichi Creek Drainage:
Gunnison County were sampled to
These watercourses are grouped
addition, stream origin and
land use for major drainages is
Tomichi Creek
Sawatch Mountains
S, NW
( Hay production,
Hot Springs Creek
Waunita Hot Springs
WSW
( Grazing,
Quartz Creek
Sawatch Mountains
SW
( Timber producti
Gold Creek
Fossil Ridge
S
( and
Cochetopa Creek
Cochetopa Hills
E, N
( Recreation
Taylor River Drainage:
Willow Creek
Sawatch Mountains
NNW
( Timber products
Texas Creek
Elk Mountains
W
( Grazing, and
Taylor River
Elk Mountains
SE, S
( Recreation
East River Drainage:
Cement Creek
Italian Mountains
SSW
( Recreation,
Slate River
Elk Mountains
SE
( Grazing,
Oh-Be-Joyful Creek
Ruby Range
ESE
( Mining,
Coal Creek
Ruby Range
E
( and
East River
Elk Mountai ns
SSE
( Hay production
North Fork Drainage:
Anthracite Creek
Anthracite Range
WSW
( Coal Mining,
Coal Creek
West Elk Mountains
N
( Grazing,
Muddy Creek
Grand Mesa
ss:
( Timber, and
North Fork Gunnison River
confluence of
( Hay and Fruit
Anthracite & Muddy
w
( production
Gunnison River Drainage:
Ohio Creek
Anthracite Range
SSE
( Grazing,
Gunnison River
confluence of
( Hay production,
East & Taylor Rivers
SW, w
( Recreation,
Cebolla Creek
San Juan Range
NNW
( and
Lake Fork Gunnison River
San Juan Range
N
( Timber
Little Blue Creek
Alpine Plateau
N
Big Blue Creek
San Juan Range
N
Crystal River:
Elk Mountains
NW
( Recreation and
( Timber
3
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LOCATIONS OF SAMPLING SITES AND FREQUENCY OF SAMPLING
Thirty-two sampling sites were established throughout the County. The
sites were chosen to be as representative as possible of the entire stream
segment being sampled. Because the object of this study is to establish the
general water quality for those segments, the few known point-sources of
pollution were not evaluated.
The approximate location of each sampling site on each watercourse is
shown in Figure 1, pg 8 . The STORET location code, excluding the County
designation (08), is used as the symbol for the site location on the map and
throughout this study; for example, the symbol for site 08TC03 is TC03.
Sampling occurred seasonally (spring, summer, fall), monthly, or semi-
monthly, depending on location. During the summer sampling period (August,
1977) sediment samples were taken at all sites, in addition to the regular
water samples. Sampling began on January 3, 1977 and ended December 29, 1977.
The approximate locations of sites included in other water studies
conducted in this county are shown on Figure 2, pg 9 . Reference numbers
assigned to the sites to facilitate discussion in the Results section and for
use in Table 2 of that section are arbitrarily chosen to avoid the confusion
of the several numbering systems in the original studies.
The immediately following information includes site name, site symbol,
coordinate location, site description, and frequency of sampling for each site
in the present study.
Tomichi Creek Drainage
Tomichi Creek 3 (TC03)
Hot Springs Creek (HSCK01)
Tomichi Creek 2 (TC02)
Quartz Creek 2 (QC02)
Quartz Creek 1 (QC01)
Gold Creek 2 (GC02)
Gold Creek 1 (GC01)
106° 25' 17.7" @ Hwy.#50 bridge, .5 mile Monthly
38° 24' 3.5" W. of Sargents
106° 31' 51.1"
38° 30' 55.3"
106° 43' 43.2"
38° 30' 15.6"
Above Hot Springs Res.at Seasonal
Res. inlet, 1.2 miles W. of
Waunita Hot Springs Resort
.5 mile E. of confluence of Seasonal
Tomichi Creek and Quartz
Creek @ Pari in
106° 30' 39.7" Pitkin C.G. bridge, .2 mile Seasonal
380 36' 53.8" above Pitkin
106° 32' 30.0"
380 34- 45.3"
106° 34'
38° 39'
106° 36'
38° 34'
10.3"
26.2"
19.6"
53.1"
Directly opposite entrance Seasonal
to Roosevelt C.G., 2 miles
W. cf Pitkin
6 miles N. of Ohio City at Seasonal
Gold Creek C.G.
1 mile N. of Ohio City on Seasonal
Gold Creek Road
4
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Cochetopa Creek (CHACK01)
Tomichi Creek (TC01)
Taylor River Drainage
Willow Creek 1 (WC01)
Texas Creek (TEXC01)
Taylor River 2 (TR02)
Taylor River 1 (TR01)
East River Drainage
Slate River 2 (SR02)
106° 25' 58.5"
380 22' 57.0"
106° 56' 22.6"
380 3T 46.8"
106° 33' 36.4"
38° 49' 4.7"
106° 33' 14.7"
380 50' 55.3"
106° 35' 11.8"
38° 54' 19.5"
106° 50' 41.3"
380 39' 51.5"
107° 00' 27.5"
38° 54' 29.0"
.4 mile N. of Gunnison/ Seasonal
Saguache county line, 35 ft.
W. of Hwy.#114 road bed
Oh-Be-Joyful Creek 1 (0BJ01)107°
00'
27.5
38°
54'
28.0
Coal Creek 1 (C0ACK01)
107°
02'
0.0
38°
51'
55.3
Slate River 3 (SR03)
106°
58'
18.0
38°
51 '
20.0
Slate River 1 (SR01)
106°
54'
12.1
38°
48'
52.4
Cement Creek 1 (CEMCK01)
106°
511
57.1
38°
49'
15.6'
2 miles S. of Gunnison on
Gold Basin Road @ USGS
Gauge Station
Two weeks
First bridge above Taylor Seasonal
Park Res. , crossing
Willow Creek
Bridge crossing Texas Creek Seasonal
.5 mile N.E. of Taylor Park
Res.
Dinner Station C.G. well Seasonal
site 4 miles N. of Taylor
Park Res.
Taylor Road Bridge crossing Two weeks
Taylor River at USGS Gauge
Station
Above confluence with Oh- Seasonal
Be-Joyful Creek above
Crested Butte
Above confluence with Slate Seasonal
River, take first road past
bridge from Crested Butte
crossing Slate River to Gun-
site Pass 4-WD road, cross
old bridge to old mine
site
1.2 miles above Keystone
Mine entrance, located 2
miles above Crested Butte
1 mile below Crested Butte
at Hwy.#135 bridge
@ Hwy.#135 bridge 5 miles
below Crested Butte
USFS Guard 1 mile N.
Hwy.#l35
of
Monthly
Monthly
Monthly
Seasonal
5
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East River (ER01)
North Fork Drainage
Anthracite Creek (AC01)
Coal Creek (CCNF01)
Muddy Creek (MC01)
North Fork ^NFGOl)
Gunnison River
Gunnison River Drainage
Ohio Creek 1 (0H01)
Gunnison River 1 (GR01)
Cebolla Creek 2 (CEB02)
Cebolla Creek 1 (CEB01)
Lake Fork (LFG01)
Gunnison River
Little Blue Creek (LB01)
106° 50" 50.2" @ Almorit Hwy.#135 bridge Two weeks
38° 39' 50.3" 50 ft. upstream of confluence
with Taylor River
107° 20' 37.4"
38° 55' 24.6"
1070 20' 37.4"
38° 55' 24.6"
107° 20'
38° 59'
49.2"
15.6"
107° 13' 35.4'
38° 19' 24.9'
5 ft. above confluence Seasonal
with Coal Creek (North Fork
Drainage) 1 mile above
confluence with Muddy Creek
Above confluence with Seasonal
Anthracite Creek @ bridge
1 mile above confluence
with Muddy Creek
@ bridge crossing Muddy Seasonal
Creek (Hwy.#133) above
Paonia Res. 40 ft. S. of
bridge on E. side of creek
bed
.6 mile E. of Gunnison/ Two weeks
Delta county line, 30 ft.
E. of Bear Creek/North Fork
Gunnison confluence
106°
55'
51.2"
2.8 miles N. of Gunnison @
38°
35'
17.2"
Castle Mountain Estates, 1
mile W. of main entrance
@ bridge
106°
59'
39.8"
@ McCabe Lane Bridge, 3.2
38°
31'
4.6"
miles S.W. of Gunnison
107°
33'
14.8"
@ C.G. 7.5 miles S. of
38°
11'
15.7"
station CEB01
107°
06'
48.2"
@ Hwy.#149 bridge crossing
38°
19'
24.9"
Cebolla Creek near
Seasonal
107° 13' 35.4"
38° 19' 24.9"
107° 24' 25.6"
38° 24' 25.6"
Powderhorn
100 yds. S. of Lower Lake
Fork Bridge at Red Bridge
C.G.
@ Halfway House on Hwy.#50
5 miles W. of Blue Mesa Dam
above confluence with Big
Blue Creek
Two weeks
Seasonal
Monthly
Two weeks
Seasonal
6
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Big Blue Creek (BB01)
Crystal River (CRY01)
107° 24'
38° 24'
107° 14'
39° 05'
25.6"
15.6"
27.5"
7.8"
@ Halfway House on Hwy.#50 Seasonal
5 miles W. of Blue Mesa
Dam, 10 ft. above confluence
with Little Blue Creek
3 miles W. of Marble
Hwy.#133 bridge
&
Seasonal
7
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Marble
MC01
SR02
Somerset
JDBJ01'
NFGOl
SR03
COACKO)
tcxco:
Crested'
Butte
CfMCKOl
W( 01
sunt
0HC01
A11110*
TR01 C
GCU2
TR01
0CO2
GC01
QCOI
Gunnison
TCOI
I'SCOl
GR01
TC02
LFGOI
CHACK01
SargenU^ TCQ3
BB01
GUNNISON COUNTY
CEB01
sampling Sites
Powderhorn
o Cities
20 mi
Figure 1. Station Locations, Base Line Study
8
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Marble
40
Almo'
Gunnison
23-34,59
Sargents
GUNNISON COUNTY
2* several locations - Blue Mesa Res
Powderhorn
20 mi
Figure 2. Sites Reported in STORET
9
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EXPERIMENTAL PROCEDURES
The sites designated in the previous section were sampled at the
indicated times in accordance with accepted EPA Methods outlined in "Methods
for Chemical Analysis of Water and Wastes" and "Standard Methods for
Examination of Water and Wastewater", 14th Ed. Water temperature, pH and
velocity measurements were taken in situ.
The samples collected were then analysed for the parameters listed in
Parameters Studied and Analytical Procedures. Data gathered in the sample
analysis was averaged and standard deviations run where possible. The range
average and standard deviations are presented in Appendix Tables A-1 to A-7.
Appendix Figures A-1 through A-28 show the same data on maps so that variations
from site to site on a given water course can be examined.
The data were then used to determine which State of Colorado Water
Classification could be best applied to each site by the methods described
in Classification Procedures. A similar analysis of data available from
previous studies was done and those sites (Figure 2, pg 9 ) fitted into the
classification scheme (Table 3, pg19 ). Because of the extensive nature of
this data, tables analogous to Appendix Tables A-1 through A-7 are not presented
Instead, it was arranged by parameter on a county-wide basis. The number of
measurements, average value and range for each parameter are given in Appendix
Table A-11, where they are listed by STORET number, indicating the analytical
procedure used in the analysis. These data are all available in the Gunnison
County Sanitarian's office by site and by parameter.
Discussion of the results in terms of site and parameter is included in
Results section.
10
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PARAMETERS STUDIED AND ANALYTICAL PROCEDURES
All parameters considered under the 1974 system of classifying water
quality were studied in this research. In the case of biologicals, samples
were taken repeatedly over a long period of time, instead of intensively over
a short period of time (the recommended procedure).
Analyses for metals extractable from sediments were run for only one
sampling date. Other analyses for metals (including some listed subsequently
under minerals) were conducted only on "seasonally-collected-samples".
Cyanide was determined in samples, but data are not reported since no
measurable quantity was found (less than 10 micrograms per liter).
The following information lists parameters studied and references for
analytical procedures used in the study; analyses were conducted at the
Colorado State University Mountain Meadow Research Center, unless noted
otherwi se:
Biological Parameters:
Total Coliform - Membrane Filter 909A: pp 928-935, Standard Methods for
Examination of Water and Wastewater, 14th Ed. APHA-AWWA-WPCF.
Fecal Coliform - Membrane Filter 909C: pp 937-939. ibid.
Fecal Streptococcus - Membrane Filter 91 OB: pp 944-945. ibid.
Dissolved Oxygen (DO) - Azide Modification 422B: pp 433-447. ibid.
Biochemical Oxygen Demand (BOD) - Azide Modification 507: pp 543-550. ibid.
Nutrient Parameters:
Ammonia Nitrogen (NH3-N) - Nesslerization 418B: pp 412-416, Chemical Procedures,
Standard Methods for Examination of Water and Waste-
water, 14th Ed. APHA-AWWA-WPCF.
Nitrate Nitrogen (NO3-N) - Chromotropic Acid 419E: pp 429-431. ibid.
Phosphate Phosphorus (PO^-P) - Ascorbic Acid 425F: pp 481-483. ibid.
Total Kjeldahl Nitrogen (TKN) - Nitrogen, Kjeldahl, Total STORET No. 00652 Micro
Kjeldahl Sys+an 7.3: pp 178-181, Methods for
Chemical Analysis of Water and Wastes.
EPA 625/6-74-003.
n
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Mineral Parameters:
Sulfate (SO^) - Turbidimetric Method 427C: pp 496-498, Chemical Procedures,
Standard Methods for Examination of Water and Wastewater, 14th
Ed. APHA-AWWA-WPC F.
Chloride (CI-) - Argentometric Method 408A: pp 303-304. ibid.
Fluoride (F~) - Electrode Method 414B: pp 391-393. ibid.
Cyanide (CfT) - Colorimetric Method 413D: pp 370-372. ibid.
Boron (B) - Analyzed with an Inductively Coupled Electron Emission Plasma
Spectophotometer by the Colorado State University Soil Testing
Laboratory.
Calcium (Ca) -
Magnesium (Mg) - " " " "
Potassium (K) - "
Sodium (Na) -
Metal Parameters:
NOTE: For sediment analyses, metals extracts were prepared by the procedure
Metals 4.1.3 pp 82-83, Methods for Chemical Analysis of Water and Wastes.
EPA 625/6-74-003. Extracts were then analysed as water samples by the
laboratories listed. All analyses are for total metal content.
Arsenic (As) - Atomic Adsorption by the Colorado State University Analytical
Chemistry Facility.
Aluminum (A1) -
Cadmium (Cd) -
Chromium (Cr) -
Copper (Cu) -
Iron (Fe) -
Manganese (Mn) -
Lead (Pb) -
Zinc (Zn) -
Analyzed with an Inductively Coupled Electron Emission Plasma
Spectophotometer by the Colorado State University Soil Testing
Laboratory.
12
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Physical Parameters:
Temperature - Section 212: pp 125-126, Standard Methods for Examination of
Water and Wastewater, 14th Ed. APHA-AWWA-WPCF.
Conductivity - Section 205: pp 71-74. ibid.
pH - Section 424: pp 460-465. ibid.
Total Non-filterable Residue (Suspended Solids) - Dried at 103-105C - Section
208D: pp 94. ibid.
Velocity - Pitot tube - U.S. Department of Interior Bureau of Reclamation
Water Measurement Manual, 2nd Ed. Cat. No. I 27.19/2:
W29/2/974. Chap. 7, pp 159-161.
PARAMETERS NOT STUDIED
The State of Colorado uses some parameters not considered in this study
in their classification of surface waters. These include: algae, barium,
beryllium, chlorine, mercury, molybdenum, nickel, pesticides, selenium, silver,
thallium, turbidity, uranium, and other radioactive materials. These parameters
were not considered to be of significance for this study because of an absence
of sources for introduction into stream water.
DATA FROM OTHER SOURCES
Water quality data from other sources are included in this report, as
requested by EPA and Gunnison County. Data was supplied from the STORET system
and water studies by James Erickson of Four Corners Environmental Research
Institute, and John Woodling of the Colorado Department of Public Health. Data
were catalogued by site and by parameter. The STORET data was contributed
primarily by the United States Geological Survey and the Colorado Department of
Public Health. There are sixty-two sites represented, and forty-two parameters
measured, including fourteen metal, ten mineral, three biological, four physical,
and eleven nutrient parameters, for a total of 8,076 individual measurements.
13
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CLASSIFICATION PROCEDURE
The classification of a stream segment involved the comparison of the
available average parameter measurements for the site representing the segment,
with the criteria applied to that parameter by the Water Quality Control
Commission, Colorado Department of Health. All data from this study and all
other studies reviewed were evaluated.
The criteria for classes Ai and B-j were taken from "Water Quality
Standards and Stream Classification"; pp 3-6; Adopted: January 15, 1974;
Effective: June 19, 1974.,
and for REC-C1 , CWB-C1, AGR and DWS-C2 from "Water Quality Standards for
Colorado"; Adopted: May 2, 1978; Effective: July 20, 1978.
The specific criteria for parameters measured in this study are shown in
Table 1 , pg 15.
The stream segment was placed in a given classification if the mean values
of the measured parameters met the criteria for that class with at most two
exceptions, and any exceptions noted. Some sites showed out-of-1imits values
for unionized ammonia (NH3), pH and fecal streptococcus (FS). This is an
apparently seasonal phenomenon correlated with run-off from irrigated, grazed
meadows during warm weather. Unless this "biological pollution" occurred
year-round, the values were not considered to be descriptive of the overall
character of the stream, and they were omitted in determining stream
classification (not permitting a few high values to negate the weight of many
low ones). In this connection it should be repeated that accepted procedures
call for five determinations over a 30 day period; it was the opinion of
those conducting this study, or counselling for it, that repeated determinations
over one year was more descriptive, and so the latter procedure was used.
Sites in the present study that met the criteria for CWB-C1 or DWS-C2 also
met those for REC-C1 and AGR.
Some of the parameters studied do not have specific numerical criteria
with respect to any class at the present time. Those in this study are:
conductivity, suspended solids, stream velocity, phosphate-phosphorus, total
Kjeldahl nitrogen, sodium, potassium and calcium. In addition, turbidity
measurement, MBAS, algae, alkalinity measurements and hardness measurements,
several types of residue measurements are included in other studies but are not
used in classification schemes.
14
-------
Table 1. STATE OF COLORADO WATER QUALITY STANDARDS
Parameter
Class. Class.
A1 Bi
CI ass.
CWB-C1
CI ass.
DWS-C2
Class.
REC-C1
CI ass.
AGR
DO (mg/1)
>6 >6
>6
aerobic
aerobic
aerobic
pH (su)
6.5-8.5 6.0-9.0
6.5-9.0
5.0-9.0
6.5-9.0
-
Temp (°C)
<20 <20
^ 20
^ 20
-
-
A1 O^g/1)
-
100
-
-
-
As (^g/1 )
-
50
50
-
100
Cd O-g/i)
-
.4
10
-
10
Cr U«g/l )
-
4
50
-
100
Zn j^/1)
-
50
5000
-
2000
NH3 (mg/1)
-
.02 (un-
ionized)
.5 (total)
-
-
CI" (mg/1)
-
-
250
-
-
Fl" (mg/1)
-
-
2.4-1.4
-
-
NO3- (mg/1)
-
-
10
100
-
Mg (mg/1)
-
-
125
-
-
S04"2 (mg/1)
-
-
250
-
-
PO4-3 (mg/1)
determined by site
Fecal Coliform
(col/1OOml)
geometric mean
200 1000
1000
200
1000
Fecal Strep
(col/IOOml)
geometric mean
20
.
Total Coliform
(col/100ml)
geometric mean
1000 10,000
15
-
-
-
-------
RESULTS
Gunnison County waters are generally high in quality, as subsequent data
will show in this section of the report. The first part of this section
emphasizes the overall classification of water at individual sites. The second
part of this section emphasizes individual parameters of water quality - showing
how the parameter varies with sites.
CLASSIFICATION OF WATER QUALITY AT SAMPLING SITES
Note: Tables 2 and 3 (pg 17 and 19) list each sampling site and its
ascribed water classification. The "best-fit" assessments of
classification were made on the basis of data made available through
our "base line study" research measurements 0£ on the basis of data
from other research studies. In many instances, data were not
available for all parameters used in classification; thus,
classification assessments are incomplete. In the base line study,
we studied all parameters which might realistically be considered
possible problems for our county. See "Classification Procedures",
page 14 for further notes on this subject.
Thirteen out of the 32 base line sites (or 41%) can essentially be placed
in the 1974 A] category (Table 2 ). Eleven out of 32 (34%) are essentially A-j ,
except for excessive counts of fecal streptococcus at one time or another. The
remaining 8 sites are classified B-| (25% of the total). By the 1978 classification
scheme, 19 of the 32 sites (59%) meet the Cold Water Biota Class 1 (CWB-C1)
criteria. Eight sites meet CWB-C1 specifications except for one parameter (25%).
Three sites miss CWB-C1 by two parameters (9%). Twenty-four sites meet the
criteria for DWS-C2 (75%). Five sites missed this classification by one parameter
(16%). One site missed DWS-C2 by two parameters (3%). All sites met the criteria
for Recreation Class 1 (REC-C1 ) and Agricultural (AGR), but one site (335), Coal
Creek, only met these class criteria. Muddy Creek met the class criteria for REC-C2
and AGR.
Classified solely upon the limited data available, 60 of the 64 STORET sites
may be classified Ai (94% of the total); the remainder are classified Bi (6%)
(Table 3 ). Under the 1978 classification system, 40 of the 64 (62%) are classified
CWB-C1 and DWS-C2. At the middle bridge over Blue Mesa Reservoir (location #2),
low levels of dissolved oxygen prohibited the CWB-C1 classification. At the
juncture of Coal Creek and Elk Creek (location #9), on Oh-Be-Joyful Creek (location
#39) and on the Slate River above Crested Butte (location #48), excessive lead and
zinc exceeded DWS-C2 limits. Coal Creek at Irwin (location #7) had excessive
lead, alone. The South Fork of the Crystal River (location #12), one location on
the Gunnison River (location #34), Middle Quartz Creek (location #40), Sanford
Creek (location #44), the Taylor River (location #53) and Willow Creek (location #64)
all recorded excessive mercury for the DWS-C2 at one time or another. Two locations
on the Crystal River and one on the North Fork of the Crystal River (locations
#13, #14 and #11 respectively) showed excessive sulphate for DWS-C2. A site near
Gunnison (location #32) and one near Paonia Reservoir (location #40) showed
excessive ammonia. Five sites were classified REC-C1.
16
-------
Table 2. CLASSIFICATION OF STREAM SEGMENTS INCLUDED IN THE BASE LINE STUDY
SITE
1974
CLASSIFICATION
JULY, 1978
CLASSIFICATION
Anthracite Ck.
(ACOl)
A1
(exc FS)
CWB-C1; DWS-C2;
Big Blue Ck.
(BBOl)
B1
CWB-C1; DWS-C2;
Cebolla Ck.-l
CEBOl
A1
(exc FS)
CWB-C1, DWS-C2;
Cebolla Ck.-2
CEB02
A|
(exc FS)
CWB-C1 (exc Al); DWS-C2;
Cement Ck.
CEMCKOl
B1
CWB-C1; DWS-C2;
Cochetopa Ck.
CHACKOl
B1
CWB-C1 (exc NH3); DWS-C2 (exc Mn);
Coal Ck.
COACKOl
A1
REC-C1 ;
Coal Ck.
CCNFOl
A1
(exc FS)
CWB-C1; DWS-C2;
Crystal Ck.
CRYOl
Al
CWB-C1 (exc Al); DWS-C2;
Last River
EROl
Al
CWB-C1; DWS-C*;
Gold Ck.-l
GCOl
Al
CWB-C1 (exc Zn); DWS-C2;
Gold Ck.-2
GC02
Al
CWB-C1; DWS-C2;
Gunnison River
GR01
B1
CWB-C1 (exc NH3); DWS-C2;
Hot Springs Ck.
HSCKOl
B1
CWB-C1 (exc Al); DWS-C2 (exc Mn & F);"
Lake Fork Gunnison River
LFG01
Al
(exc FS)
CWB-C1 (exc Al & NH3;; DWS-C2;
Little Blue Ck.
LBOl
Al
(exc FS)
CWB-CI (exc Al); DWS-C2
*Fluoride is natural in
thi s
water from
a hot spring.
17 (continued)
-------
Table 2. (continued)
1974 JULY, 1978
SITE CLASSIFICATION CLASSIFICATION
Muddy Ck.
MC01
B1
REC-C2;
**
North Fork Gunnison
NFG01
River
A1
(exc
FS)
CWB-C1
(exc Al & NH3); DWS-C2;
Oh-Be-Joyful Ck.
0BJ01
A1
CWB-C1
(exc Al & Zn); DWS-C2;
Ohio Ck.
0HC01
B1
CWB-C1 ;
DWS-C2;
Quartz Ck.-l
QC01
Al
CWB-C1 ;
DWS-C2;
Quartz Ck.-2
QC02
A1
CWB-C1;
DWS-C2;
Slate River -1
SR01
Al
(exc
FS)
CWB-C1 ;
DWS-C2 (exc Mn);
Slate River -2
SR02
A1
(exc
FS)
CWB-C1;
DWS-C2;
Slate River -3
SR03
Al
CWB-C1
(exc Zn)*, DWS-C2 (exc Mn);
Taylor River -1
TROl
Al
CWB-C1;
DWS-C2;
Taylor River -2
TR02
Al
CWB-C1;
DWS-C2;
Texas Ck.
TEXC01
A1
CWB-C1;
DWS-C2;
Tomichi Ck.-l
TC01
A1
(exc
FS)
CWB-C1;
DWS-C2 (exc Mn);
Tomichi Ck.-2
TC02
B1
CWB-C1 ;
DWS-C2 (exc Mn);
Tomichi Ck.-3
TC03
A1
(exc
FS)
CWB-C1;
DWS-C2;
Willow Ck.
WC01
A1
CWB-C1;
DWS-C2;
**Heavy natural suspended solids produce an apparent high metal content.
18
-------
Table
3. CLASSIFICATION OF
STREAM SEGMENTS FROM
STORET DATA.
LOCATION
NUMBER
LOCATION
1974
CLASSIFICATION
JULY, 1978
CLASSIFICATION
1
Blue Mesa Reservoir
A1
CWB-C1 ; DWS-C2;
2
Blue Mesa Reservoir
A1
CWB-C1 (exc DO); DWS-C2;
3
Carbon Creek
Al
CWB-C1; DWS-C2;
4
Cement Creek
A1
CWB-C1; DWS-C2;
5
Coal Creek/Crested Butte
A1
REC-C1 ;
6
7
Coal Creek above Keystone
Mine
Coal Creek/Irwin
A1
A1
CWB-C1; DWS-C2;
DWS-C2 (exc Pb & Fe)
8
Coal Creek/Wildcat Creek
Bl
REC-C1 ;
9
Coal Creek/Elk Creek
Al
DWS-C1 (exc Pb & Zn);
10
Coal Creek/Crystal River
A1
CWB-C1; DWS-C2;
11
No. Fork Crystal River
A1
CWB-C1 ; DWS-C2 (exc S04);
12
So. Fork Crystal River
Al
CWB-C1 (exc Hg); DWS-C2;
13
Crystal River
Al
CWB-C1; DWS-C2 (exc SO4);
14
Crystal River
Al
CWB-C1; DWS-C2 (exc S04);
15
Crystal River
A1
CWB-C1; DWS-C2;
16
Crystal River
A1
19
CWB-C1; DWS-C2;
(continued)
-------
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Table 3.
(continued)
LOCATION
1974
CLASSIFICATION
JULY, 1978
CLASSIFICATION
East River
East River
East River
East River
East River
East River
Gunnison River
Gunnison River
Gunnison River
Gunnison River
Gunnison River
Gunnison River
Gunnison River
Gunnison River
Gunnison River
Gunnison River
DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1 (exc NH3); DWS-C2;
20
(continued)
-------
33
34
35
37
38
39
40
41
42
43
44
45
46
47
48
49
Table 3. (continued)
LOCATION
1974
CLASSIFICATION
JULY, 1978
CLASSIFICATION
Gunnison River
Gunnison River
Hot Springs Creek
Bl
Lake Fork Gunnison River A-j
Lake Fork Gunnison River A
Oh-Be-Joyful Creek
Paonia Reservoir
Middle Quartz Creek
Quartz Creek
Quartz Creek
Cement Creek
Sanford Creek
Slate River
Slate River
Slate River
Slate River
1
CWB-C1; DWS-C2;
CWB-C1 (exc Hg); DWS-C2(exc, Mn);
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
DWS-C2 (exc Pb & Zn);
CWB-C1 (exc NH3); DWS-C2;
CWB-C1 (exc Hg); DWS-C2;
CWB-C1; DWS-C2
CWB-C1 ; DWS-C2
CWB-C1; DWS-C2
CWB-C1 (exc Hg)
REC-C1 ;
DWS-C2;
CWB-C1 (exc Cd); DWS-C2;
CWB-C1; DWS-C2;
DWS-C2 (exc Pb & Zn);
(continued)
21
-------
50
51
52
54
55
56
57
58
59
60
61
62
63
"64
"65
66
Table 3.
(concluded)
LOCATION
1974
CLASSIFICATION
JULY, 1978
CLASSIFICATION
Slate River
Slate River
Slate River
Slate River
Taylor River
Taylor River
Taylor River
Taylor River
Tomichi Creek
Tomichi Creek
Tomichi Creek
Tomichi Creek
Tomichi Creek
Tomichi Creek
Waunita Hot Springs
Willow Creek
REC-C1 ;
REC-C1;
CWB-C1; DWS-C2;
DWS-C2 (exc Zn);
CWB-C1 (exc Hg); DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1; DWS-C2;
CWB-C1 (exc Hg); DWS-C2;
22
-------
PARAMETERS OF WATER QUALITY
Note: In the following discussion, each parameter measured in the
base line study will be considered in terms of range of individual
measurements, averages, and notable exceptions to the average
values. Results obtained from other studies will then be considered.
Refer to maps showing site locations, Figures 1 and 2, pages 8 and 9
to locate indicated sites. The Appendix tables and figures applicable
to each parameter are listed at the beginning of the discussion of
each parameter. The Appendix tables list range, average and standard
deviation (where determined) for each parameter at each site.
Dissolved Oxygen (DO) (Appendix: Table A-l, Fig. A-l, Table A-ll)
All stations in the base line study had at least 6 milligrams per liter
(mg/1) required for placement in the Colorado A-| Classification. Values ranged
from 7.1 to 12.6 mg/1. Appendix Table A-l gives data for DO at individual
sampling stations. There is no consistent pattern of increasing or decreasing
DO in streams travelling from stations at higher elevations to stations at lower
elevations, evidenced by examining Appendix Figure A-l. These oxygen levels
place waters in the 1974 Class A] and in the 1978 classes Cold Water Biota
Class 1 (CWB-C1), Domestic Water Supply Class 2 (DWS-C2), Recreation Class 1
(REC-C1) and Agricultural (AGR).
Data available in STORET showed that 212 measurements of DO averaged 8.1
mg/1, with values ranging from 5.3 to 10.4 mg/1. The only measured sites with
values below 6, which is the minimum acceptable value for classes A-| and CWB-C1 ,
were on Blue Mesa Reservoir.
Biochemical Oxygen Demand (BODQ (Appendix: Table A-l, Fig. A-2, Table A-ll)
Values ranged from less than 1 to 6.2 mg/1. The average of 112 measurements
available through other sources was 1.4 mg/1 with a range of 1.17 to 1.63 mg/1.
BOD5 is not included as a criteria for any classification, however, a value over
5 mg/1 is considered a possible pollution indicator. Values of 5.0 mg/1 or more
were found in nine of 264 measurements: TC03 (3), TC02 (1), GR01 (2), ER01 (1),
LFG01 (1), NFG01 (1). However, the highest average value for any site was
3.7 mg/1 at TC02.
Total Coliform (Appendix: Table A-l, Fig. A-3, Table A-ll)
Geometric mean values ranged from 8 to 1,807 col/100 ml for sites in the
present study and all sites met the A classification criteria of a geometric
mean of less than 1,000 col/100 ml, except MC01, OHOl and TC02. Total Coliform
is not used as a criteria for any 1978 classification. The 219 measurements
available through other data were taken at four locations - one on Taylor River
at Almont and one on the East River at Almont, both of which have averages of
less than 500 col/100 ml. The other two locations, one on Gunnison River west
of Gunnison and Tomichi Creek, had averages over 4,000 col/100 ml.
23
-------
Fecal Coliform (Appendix: Table A-l, Fig. A-4, Table A-11 )
Geometric means for sites in the present study ranged from 2 to 283 col/100 ml.
Those over the Ai classification limit were MC01 and TC02. The 1978 standards
classification REC-C1 limit of 200 col/100 ml was exceeded only by MC01. The
DWS-C2 and AGR limit of 1,000 col/100 ml was not exceeded at any site. Data from
other sources had 248 measurements with an average of 356 col/100 ml and a range
of 0 to 1,087 col/100 ml. There were two sites, one on Gunnison River and one
on Tomichi Creek, which measured a total of 110 times with unusually high counts.
Without those two stations the average value would be 61 col/100 ml, with only 5
of the remaining 138 measurements being in excess of 100 col/100 ml.
Fecal Streptococcus (Appendix: Table A-l, Fig. A-5, Table A-l1)
All sites in the present study except C0ACK01, CRY01, GC01 , GC02, LFG01,
QC01, QC02, SR03, TR01, TR02, TEXC01 and WC01 had geometric mean values greater
than the A] limit of 20 col/100 ml, however the high values were distributed over
a very brief period of time and were not descriptive of the general nature of the
stream. Other sources of data provided only 18 values. They were taken from
points in the Crested Butte-Gunnison-Pitkin area in June and July, 1974. The
values ranged from 13 to 595 col/100 ml with an average of 221 col/100 ml. They
were single samples, therefore not providing a geometric mean and taken during
the peak time for fecal streptococcus concentrations and therefore not
representative of overall stream quality. Fecal streptococcus is not used in
the 1978 classification scheme.
Temperature (Appendix: Table A-2, Fig. A-6, Table A-l1)
Class A-| temperature criteria is specified in terms of temperature rise
caused by discharges into a stream. So far as is known, there are no warming
discharges into county streams. Therefore, normal diurnal and seasonal
fluctuations are assumed to be maintained and the diurnal temperatures were not
monitored in this study. The highest temperature was measured on Hot Springs
Creek (HSCK01) at 70°F; the lowest, 31°F on Tomichi Creek (TC01). Average
temperatures on the various sites cannot be directly compared because some
averages represent sites whose temperatures were measured all year long and some
only spring, summer and fall. However, the averages ranged from 39°F at C0ACK01
to 61 °F at HSCK01.
Although diurnal temperatures were not monitored in this study, a previous
study conducted at Mountain Meadow Research Center (unpublished data) included
monitoring the diurnal fluctuations on Ohio Creek over a period of the six
months May through September, 1971, which showed the largest changes in
temperature to be 20°F in May (34° to 54°) and August (50° to 70°), and the
least 15° (53° to 68°) in July. One is tempted to assume winter temperatures
would show less change, since air temperatures stay below freezing for long
periods of time.
Of the total 264 temperature measurements made, only six were over 68°F
(20°C); five of those were 69°F and one 70°F, placing the entire system of
streams in the Cold Water Biota Class.
24
-------
pH (Appendix: Table A-2, Fig. A-7, Table A-ll)
Values on sites in the present study ranged from 6.5 to 10.7 SU, with a total
of 59 (22%) of the 264 readings being greater than 8.5 SU. With the exception of
CEMCK01 and CHACK01 any average pH over 8.5 SU was produced by one (in the case of
stations measured only three times) or several high values which occurred,
almost exclusively, during spring run-off in May and June. These values, because
of the limited time of occurrence were not considered to be descriptive of the
quality of water and were not included in classification estimates. A^ class
waters may have a range of 6.5 to 8.5 SU; B-j, REC-C1 and CWB-C1 classes 6.5 to
9.0 SU, and DWS-C2 5.0 to 9.0 SU. There were 34 pH measurements over 9.0 SU
falling in the same pattern as the over 8.5 SU measurements.
Other data included 374 measurements ranging from 5.6 to 8.8 SU, average
7.9 SU. Three measurements fell below the 6.5 SU limit, all three on Coal Creek
near the confluence with the Keystone Mine effluent. The effluent itself
measured 3.0 SU. Seven other relatively low values occurred on Slate River and
Coal Creek.
Conductivity (Appendix: Table A-2, Fig. A-8, Table A-ll)
Conductivities ranged from 45 jumhos at C0ACK01 to 715yumhos at HSCK01.
HSCK01 conductivity measurements were considerably higher than those at other
sites due to hot springs source. Twenty-seven other sites had average conductance
values of less than 300 -umhos.
Other data reviewed listed 403 measurements of conductivity with a range of
50 to 890 /jmhos. Conductivity is not used in the criteria of any of the
classifications, however, the relatively low values indicate generally low
concentrations of dissolved salts (.01 M KC1 has a conductivity of l,408Aimhos
at 25°C).
Suspended Solids (Appendix: Table A-2, Fig. A-9, Table A-ll)
Suspended solids values found in the present study ranged from less than
.1 mg/1 to 122 mg/1 on all sites except MC01 where the range was 294 to 1,708 mg/1.
Average values, except at MC01 and WC01 , were 17 mg/1 or less. Other data
provided 126 measurements with a range of 3.0 to 24 mg/1 and an average of 14 mg/1.
Those values came exclusively from the Gunnison River and tributaries north of
the river's confluence with Tomichi Creek. Measurements from the same area in
this study averaged approximately 6 mg/1. Although suspended solids is not a
criteria for any current classification it had been suggested that 25 mg/1 be used
as a criteria for CWB-C1. (Proposed Water Quality Standards, October 28, 1976).
Stream Velocity (Appendix: Table A-2, Fig. A-10, Table A-ll)
Stream velocities were measured from May through December. At a given site,
the variation in velocity was less than .1 ft/sec in many cases; the largest
variation was 1.7 ft/sec. There was no general "high" flow period with respect
to time of year. (It was not deemed practical to measure volume of stream flow
in our year-long study. In addition, 1977 was a drouth year.) Velocity is not
used as a criteria for any classification.
25
-------
Total Ammonia (NH^+NH3)-N (Appendix: Table A-3, Fig. A-ll, Table A-ll)
Actual measured-values shown in tables and figures were total ammonia,
(NH++NHo)-N values, from which unionized ammonia (NH3-N) values were calculated.
As a pollution indicator this material should not be over .5 mg/1 to meet
DWS-C2 criteria. The values found in this study varied from .08 to 1.02 mg/1.
The 22 high values were found no more than twice at any station and no average
value was over 0.40 mg/1. A similar pattern was found in other studies.
Unionized ammonia values ranged from less than .001 to .090 mg/1 with
values over the .02 mg/1 limit for CWB-C1 in 54 (20%) of the measurements made
in this study. Of those, 10 occurred at NFG01, 9 at GR01, 5 at LFG01 and 4 at
TC01. Other over-the-1imit values were distributed randomly among the other sites.
All sites, other than those on the highest streams, such as WC01, TEXC01, AC01, TR02,
GC02 and QC02. 0BJ01 and SR02 would probably have high unionized ammonia values
if sampled frequently over the summer. High values were restricted to summer and
except for GR01 and NFG01 occurred over such a short time period so as not to be
considered descriptive. All averages were less than 0.02 mg/1. There is no other
classification for which unionized NH3-N is used as a criteria.
Nitrate-nitrogen (diss) (Appendix: Table A-3, Fig. A-12, Table A-ll)
The nitrate-nitrogen values found in this study ranged from less than .01 to
.54 mg/1, with averages ranging from .07 to .23 mg/1. Those in other studies had
a range of 0.08 to 1.0 mg/1 and an average of .49 mg/1. The criteria for DWS-C2
is 10 mg/1 and for AGR is 100 mg/1. No sites studied were over the limits.
Phosphate-phosphorus (Appendix: Table A-3, Fig. A-13, Table A-ll)
No specific numerical criteria is used for this parameter. The range found
in this study is 0.00 to 0.20 mg/1 with averages ranging from 0.00 to 0.12 mg/1.
The range found in other data reviewed was 0.006 to 4.71 mg/1 with an average of
.33 mg/1. These measurements included two sets of samples taken at sites 32 and
33 known as point sources of pollution. For the other 94 samples representing
18 sites, the average was less than 0.01 mg/1.
Total Kjeldahl Nitrogen (TKN) (Appendix: Table A-3, Fig. A-14, Table A-ll)
The range found in this study was from .2 to 2.5 mg/1 with averages ranging
from .4 to 1.4 mg/1. TKN in 86 samples from other studies ranged from .02 to 11.2
mg/1 with an average of 1.2 mg/1. This parameter is not used in classification.
Sodium (total) (Appendix: Table A-4, Fig. A-15, Table A-ll)
In this study, with one exception, values ranged from 1.0 to 18.0 mg/1.
Averages ranged from 1.0 mg/1 at 0BJ01, SR02 and GC02 to 16.5 mg/1 at CHACK01.
HSCK01 was exceptional where the range was 82.0 to 143.0 mg/1 with an average of
112 mg/1. Other studies provided data with 185 total sodium measurements with a
range of 2.6 to 8.9 mg/1 and an average of 5.2 mg/1. There is no classification
with a criteria for this parameter.
26
-------
Potassium (total) (Appendix: Table A-4, Fig. A-16, Table A-ll)
The sites in this study had a range of less than 1.0 to 8.0 mg/1 with
averages ranging from less than 1.0 mg/1 at numerous sites to 6.5 mg/1 at HSCK01.
Other studies recorded 13 measurements with a range of 0.00 to 10.00 mg/1 with an
average of 4.7 mg/1. There is no classification with a criteria for this
parameter.
Calcium (total) (Appendix: Table A-4, Fig. A-17, Table A-ll)
The sites in this study have a range of 7.0 mg/1 at OBJOl to 74 mg/1 at
CRY01 with averages ranging from 9.5 mg/1 at OBJOl to 55.0 mg/1 at 0HC01. Other >
data had 29 measurements with a range of 5 to 170 mg/1 and an average of 29.7 mg/1.
There is no classification with a criteria for this parameter.
Magnesium (total) (Appendix: Table A-4, Fig. A-18, Table A-ll)
The sites in this study have a range of 1.0 mg/1 at 5 sites to 18.0 mg/1
at TC02, with averages ranging from 1.0 mg/1 at OBJOl to 14.5 mg/1 at TC01.
Other data did not provide a comparable measurement. There is no classification
with a criteria for this parameter.
Sulfate (diss) (Appendix: Table A-5, Fig. A-19, Table A-ll)
Sulfate values varied from 1.2 mg/1 at WC01 to 144 mg/1 at CRY01, with
averages ranging from 3.2 mg/1 at WC01 and 87.4 mg/1 at CRY01. Other data sources
had 35 measurements ranging from 5.0 mg/1 to 30.0 mq/1 with an average of 13.8 mg/1.
DWS-C2 limit is 250 mg/1.
Fluoride (diss) (Appendix: Table A-5, Fig. A-20, Table A-ll)
Fluoride values ranged from .066 mg/1 at CCNF01 to 16.1 mg/1 at HSCK01
with averages ranging from .070 mg/1 at SR02 to 9.6 mg/1 at HSCK01. Other data
provided 13 measurements ranging from 0.10 mg/1 to 18.00 mg/1 with an average of
1.55 mg/1. The 18 mg/1 value was measured at Waunita Hot Springs (the source of
HSCK01) and is the only value of those in this group over 0.300 mg/1. Therefore,
a more realistic average, omitting that value, is 0.179 mg/1. The classification
DWS-C2 limit varies from 2.4 mg/1 to 1.4 mg/1 at various temperatures. The only
sites over the limit are HSCK01 and Waunita Hot Springs.
Chloride (diss) (Appendix: Table A-5, Fig. A-21, Table A-ll)
Chloride values ranged from 0.9 mg/1 at TR01 to 16.4 mg/1 at HSCK01 with
averages ranging from 1.6 mg/1 at WC01 and CEMCK01 to 13.8 mg/1 at HSCK01. The
second highest average value was 3.2 mg/1 at TC02. Other sources provided 229
measurements with a range of 0.20 to 10.0 mg/1 with an average of 4.7 mg/1.
DWS-C2 limit is 250 mg/1.
Boron (total) (Appendix: Table A-5, Fig. A-22, Table A-ll)
Boron values ranged from 10 to 30 xjg/1 at all sites in this study except
at HSCK01 where the values were from 30 to 60 jug/1. Averages ranged from 10 to
20 xjg/l except at HSCK01 where the average was 45 xig/1. Boron samples from other
data provided measurements of boron ranging from 7.1 to 19.5 >ug/1 with an
average of 11.6 xig/1. The only classification limit is 750 xjg/1. All measurements
were well below this limit.
27
-------
Aluminum (total) (Appendix: Table A-6, Fig. A-23, Table A-ll)
Aluminum values ranged from less than 50 to 605 xig/1 at all sites in this
study except at MC01 where the values were 3,380 to 5,100/ug/1. Average values
ranged from less than 50 Aig/1 to 505 Aig/1. If the average value at a site was
greater than 120/iig/l or both values over 100/jg/l an aluminum (A1) exception
was noted for the classification CWB-C1 designation. Other sources provided no
aluminum measurements. The limit for aluminum is 100/ig/l for CWB-C1.
Arsenic (total) (Appendix: Table A-6, Fig. A-24, Table A-ll)
Arsenic values on sites in this study ranged from less than . 5>ug/l to
8.0 >ug/l. Forty-three of the 64 measurements were less than . 5/jg/l. Other data
provided 119 total arsenic measurements all given a value of 0.00^jg/1. The
limit for classes CWB-C1 and DWS-C2 is 50,ug/l, and for AGR 100/jg/l. All
measurements were well below these limits.
Cadmium (total) (Appendix: Table A-6, Table A-ll)
Cadmium values for this study were all recorded simply as less than 5 xjg/1
because of limitations in instrument sensitivity. This allows cadmium to be
included in the classification estimates for DWS-C2 and AGR, whose limits are
10 xig/1, but not in that for CWB-C1, whose limit, at the hardness of most streams
in this study, is 0.4 xig/1.
Totdl cadmium data from other sources provides 114 measurements with a range
of 0.00 to 0.18 jug/1. All measurements were 0.00 except at one site on the East
River, location 17, where the average of 27 measurements was 0.18>ug/l. The
available dissolved cadmium data is more generally distributed over the county
with a total of 36 measurements, of which 18 are less than .4 jug/1. The other 18
were taken in the Keystone mine area at sites affected by its seepage. Those
values ranged from 0.870 to 57 >ug/l.
Chromium (total) (Appendix: Table A-&, Table A-ll)
Chromium measurements were recorded as less than 5 >ug/l or less than 10 Aig/1.
because of instrument limitations. However, because the CWB-C1 and AGR limits
are 100/ug/l and DWS-C2 limit is 50 >ug/l all sites are clearly below these limits.
Data from other sources included 126 measurements and indicate finding no chromium
Copper (total) Appendix: Table A-6, Fig. A-25, Table A-ll)
Copper measurements ranged from less than 5/jg/l to 17>ug/l. Averages-
ranged from less than 5 xig/1 at 19 locations to 17 >ug/l at MC01. Only four of the
64 measurements were over the CWB-C1 classification limit of 10 xig/1 and no
average value except a 16>ug/l average at MC01 was over the limit. DWS-C2 and
AGR limits are 1 ,000 ,ug/l and 200>ug/l respectively. Data available from other
sources provide 138 measurements with a range or 0.00 to 275 xig/1 with an average
of 8.5>ug/l. The six higher than lOxig/1 values were on Coal Creek (locations 8
and 5), Oh-Be-Joyful (location 38) and Slate River (location 48). (Keystone Mine
again!)
28
-------
Iron (total) (Appendix: Table A-7, Fig. A-26, Table A-ll)
Iron measurements ranged from 38 Ajg/1 at GC02 to 939 Aig/1 at HSCK01, except
MC01 where the values were 3,190 and 3,614 Aig/1. The averages were 42 >ug/l at
6C02 to 742 >ug/l at HSCK01, except MC01 where the average is 3,402 viig/1.
Data from other sources provides 195 measurements with a range of 60 to
3,800 Aig/1 and an average of 271 Aig/1. The CWB-C1 limit is 1 ,000 >ug/l. The
eleven values over 1 ,000 AJg/1 were all on Coal Creek and Slate River. The
Keystone Mine effluent measures 32,000 Ajg/1.
Classification DWS-C2 has a soluble iron limit of 300 ug/1. Although
soluble iron was not measured in this study, dissolved iron values available from
36 measurements in other data ranged from 10xig/l at five sites to 1 ,400 xig/1
at Coal Creek (location 7). The average was 139 >ug/l with only two sites
(locations 7 and 8) over 300. This data in combination with the low total iron
values indicate that with the exception of MC01 and HSCK01 , sites in this study
meet the DWS-C2 limits on soluble iron.
Manganese (total) (Appendix: Table A-7, Fig. A-27, Table A-ll)
Values for manganese ranged from 2 xig/1 at TEXC01 and GC02 to 791 >ug/l
at SR03. Averages ranged from 2 xig/1 at TEXC01 to 559 >ug/l at SR03. The CWB-C1
limit is 1 ,000 /ug/l; AGR 200 >ug/l, and DWS-C2 50 (sol) >ug/l. With the exception
of MC01, SR03 and TC02 all sites were within the AGR limits, and all meet the
CWB-C1 limits. Other data, including 188 measurements ranged from less than 13
to 11,195 Aig/1 with an average of 278 Ajg/1. The seven values over the AGR 200 Ajg/1
limit are found at Coal Creek and Slate River locations. No soluble manganese
values were available, therefore direct assessment for DWS-C2 was impossible,
however, if a site was given a DWS-C2 classification but had a total value of
over 50 ,ug/l it was noted with a manganese exception.
Lead (total) (Appendix: Table A-7, Table A-ll)
All sites in this study had less than 30 xig/1. Values were measured to less
than 30 >ug/l because of instrument limitations. CWB-C1 limit is 4 >ug/1, DWS-C2
50 xig/1 , and AGR 100>ug/l. Data from other sources had 126 measurements ranging from
0.00 to 11.3 >ug/l with an average of 4.0 jug/1. The high values were found on
Tomichi Creek (location 57). (Dissolved lead values were generally out of limits
for CWB-C1 in the Keystone Mine area and two out of 34 measured over 100 jug/1 in
that area.)
Zinc (total) (Appendix: Table A-7, Fig. A-28, Table A-ll)
Zinc values ranged from less than 2>ug/l at nine sites in this study to
889 >ug/l at SR03. Averages ranged from 2 /ug/1 at CEB02 to 652 >ug/l at SR03.
All sites met the AGR 2,000 >ug/l limit and DWS-C2 5,000 >ug/l limit. Six sites
failed to meet the 50 jjg/1 CWB-C1 limit. Of those four were affected by Keystone
Mine effluent - 0BJ01, SR01, SR03 and C0ACK01. The other two were TR02 and GC02
each with one high value and one very low value.
Other data available had 181 values ranging from 5.6 to 8,050 Ajg/1. The high
(over 50 Aig/1) values were found at nine sites in the Coal Creek-Slate River - Oh-
Be-Joyful Creek area affected by Keystone Mine effluent. The effluent was
measured at 100,000>ug/l dissolved zinc.
29
-------
Sediment Analyses (Appendix Tables A-8, A-9 and A-10)
These show mineral and metals content for sediments from the sites
sampled in this study. Although there are no specific limits placed on the
parameters, the measurements indicate that under extreme conditions -
including extremely low pH and high temperatures - iron, manganese, lead
and copper could become general problems. However, these conditions are
unlikely to occur if mining and ore processing activities in the area are
controlled in accordance with State and Federal requirements.
Other parameters from other studies
Many other parameters are listed in Table A-ll that may be helpful in making
a general assessment of the overall water quality in Gunnison County.
In particular, the high value of 6 /jg/1 for selenium on a total of 8
dissolved and 122 total selenium determinations is well below the most stringent
criteria (100>ug/l for DWS-C2) established.
Seventy-two silver analyses showed one value of .9/ug/l. The rest were
0.00xig/l. The most stringent limit is 10>ug/l for DWS-C2.
Total molybdenum measured on 58 samples had a high value of 1.6 jug/1. There
is no present established limit, however, molybdenum concentrations are a matter
of concern to ranchers, particularly in view of the possible opening of a large
molybdenum mine in the area.
Forty-six mercury values ranged from 0.00 to l.Oxig/1 with only one value
over 0.3>ug/l (at Willow Creek). The CWB-C1 0.5>ug/l limit is the most
stringent for all classifications.
Forty-three dissolved alpha measurements were made, two were over the
15 PC/L limit, but the error in measurement was so large that in each case the
actual value could have been well below that limit.
Twenty-four dissolved beta measurements were made, all less than 19 PC/L.
The limit is 50 PC/L.
Radium 226 was measured on eight samples. The maximum reading was .58 PC/L.
The limit is 5 PC/L.
PROBLEM AREAS
The major source of poor quality water in this area is effluent from the
Keystone Mine, which causes considerable pollution by metals in areas of Coal
Creek, Slate River and Oh-Be-Joyful Creek.
The other major problem is the increase in ammonia and pH content on Ohio
Creek, Tomichi Creek, Cochetopa Creek, Lake Fork of the Gunnison River, North
Fork of the Gunnison River and the Gunnison River during late spring, although
this seems to be distinctly seasonal and of short duration.
30
-------
APPENDIX
Appendix Tables A-l through A-7 give range, average values and standard
deviations for parameters measured in this study.
Appendix Figures A-l through A-28 give the same data shown at site
locations so that variations from site to site on a given water course can be
exami ned.
Appendix Tables A-8, A-9 and A-10 show mineral and heavy metals content
for sediment from the sites in this study.
Appendix Table A-l1 gives county-wide average values for data available
through other studies of surface water in this area. The values are listed
by STORET parameter numbers to indicate the analytical procedures used in
their measurement.
31
-------
Table A-l. BIOLOGICAL PARAMETERS
SITE
DO
mg/1
BODc
mg/T
*Total
Coliform
col/100 ml
*Fecal
Coliform
col/100 ml
*Fecal
Strep
col/100 ml
ACOl
8.1-10.6
<2-4.6
20-100
<1-20
36-150
8.9
3.0
34
7
60
BBOl
8.4-11.2
<2-4.8
48-875
2-231
42-275
9.4
3.0
276
24
142
CEBOl
6.5-11.4
<1-3.6
17-450
1-140
10-750
9.2(1.6)
2.4(.7)
119(165)
17(43)
68(207)
CEB02
7.4-10.7
2.3-4.1
103-150
9-112
37-110
8.9
3.0
119
37
57
CEMCKOI
8.4-9.2
< 2-2.1
3-115
<£ 1-10
11-175
8.8
2.0
15
4
57
CHACKOl
7.4-9.3
< 2-2.3
370-2,450
7-278
56-475
8.4
2.1
920
89
230
COACKOl
8.0-10.7
< 2-3.3
<1-370
^ 1 -36
1-65
9.4(.9)
2.2(.5)
12(104)
3(9.8)
3(19.7)
CCNFOl
8.6-10.8
1.5-3.4
8-100
1-10
21-185
9.4
2.8
22
2
45
CRYOl
8.4-8.8
< 2-3.2
20-200
5-25
6-50
8.6
2.6
43
10
20
EROl
7.1-12.0
< 1-5.8
<1-1 ,050
<1-114
<1-330
9.7(1.3)
2.6(1.2)
66(266)
4(23.8)
24(94.6)
GCOl
8.3-10.0
< 1-2.1
1-45
<1-2
6-20
8.9
2.0
8
1
13
GC02
7.8-10.0
< 1-4.8
7-35
< 1-<1
<1-11
8.8
2.6
12
1
3.8
GR01
7.2-12.6
< 2-5.4
<1-1 ,550
< 1-97
15-1 ,310
9.9(1.5)
3.3(1.0)
63(348)
8(26)
115(264)
HSCKOl
6.8-8.2
1.4-2.0
90-4,600
<1-285
90-345
7.4
1 .8
853
30
150
LFGOl
7.2-11.8
<2-5.0
<1-555
<1-30.0
2-720
9.7(1.4)
2.8(1.0)
29(157)
3(45)
20(160)
LBOl
8.2-11.1
2.2-4.5
66-500
1-70
45-300
9.3
3.0
181
16
85
(continued)
*mean values are geometric rather than arithmetic means for
32
these three
parameters.
-------
Tabl e A-l.
(continued)
SITE
DO
mg/1
bod5
mg/T
*Total
Col iform
col/100 ml
*Fecal
Col iform
col/100 ml
*Fecal
Strep
col/100 ml
MC01
8.0-9.1
< 2-4.2
120-8,250
120-970
150-875
8.7
3.3
1,189
283
395
NFG01
7.8-11.9
^2-6.0
4-1,540
< 1-98
1-735
10.0(1.4)
3.2(1.1)
93(347)
9(22)
39(152)
0BJ01
7.6-9.1
00
CO
1
V
35-64
3-11
10-55
8.6
2.3
48
6
22
0HC01
7.3-8.4
< 2-3.6
400-8,200
10-70
65-800
8.0
2.7
1 ,807
29
243
QC01
8.2-9.9
< 2-2.5
4-320
1-14
<1-137
9.0
2.2
42
2
15
QC02
8.6-10.5
<2-2.7
2-100
M-l
2-82
9.3
2.4
23
1
19
SR01
7.8-10.5
< 2-4.2
<1-330
<1-40
2-141
9.4 (. 9)
2.0(.9)
25(124)
5(16)
36(44)
SR02
7.7-9.2
<1-3.1
53-125
<-1-95
18-135
8.6
2.0
87
12
51
SR03
8.3-11.0
< 2-2.6
<1-250
<1-50
<1-110
9.3 (. 9)
2.2 (. 4)
19(93)
6(22)
15(34)
TR01
8.7(11.5
< 2-3.6
<1-1 ,200
<1-11
<1-83
10.0(1.0)
2.6 (. 5)
30(348)
2(4.1)
6(24.7)
TR02
7.9-9.2
<1-2
9-60
< 1-44
1-25
8.7
1.6
23
4
8
TEXC01
8.0-9.0
< 1-2
8-121
< 1-14
< 1-20
8.6
1.6
29
2
3
TC01
8.9-12.4
^ 2-6.2
<2-2,750
<1-370
12-450
10.0(1.3)
3.1(1.2)
221 (820)
24(121)
98(146)
TC02
7.7-10.2
2.2-5.5
340-7,500
99-425
110-2,150
8.8
3.7
1 ,359
164
452
TC03
7.8-11.2
< 2-4.1
5-3,080
< 1-1 ,050
11-TNTC
9.5(1.0)
2.4 (. 8)
166(1 ,104)
15(296)
68(175)
WC01
8.2-9.2
< l-< 2
21-330
1-108
5-85
8.7
^ 2
101
9
20
*mean values are geometric rather than arithmetic means for these three parameters.
33
-------
Table A-2. PHYSICAL PARAMETERS
pH Suspended
Temp. std. Conductivity solids Velocity
SITE °F units /imhos/cm mg/1 ft/sec
AC01
41-61
8.0-8.7
98-148
.4-9.9
1.9-2.9
51
8.3
121
4.1
2.3
BB01
35-58
7.8-10.1
84-146
2.0-5.1
1.1-2.2
46
8.6
124
3.5
1.6
CEBOl
33-67
7.2-8.6
100-340
1.2-52.6
1.1-2.8
45.2(13.7)
7.8(.4)
158(62.8)
11 .5(14.3)
1.9 (. 5)
CEB02
35-56
8.0-9.4
86-138
2.6-8.9
1.9-2.0
46
8.6
109
6.4
1 .9
CEMCK01
39-54
8.7-10.3
240-310
1.5-8.6
1.1-1.9
44
9.3
286
4.7
1.5
CHACK01
47-62
8.6-9.3
280-384
1.1-33.9
1.6-3.2
55
9.0
317
13.5
2.4
C0ACK01
32-52
6.4-10.4
45-200
.2-11.0
1.1-2.2
38.6(7.6)
7.8(1.0)
121(66.5)
2.9(2.8)
1.5(.5)
CCNF01
44-59
8.3-10.5
100-132
.7-9.8
1.6-2.6
51
9.1
114
5.2
2.0
CRYOl
41-49
7.7-8.7
144-395
2.4-17.4
1.9-4.0
44
8.2
291
11.8
2.6
ER01
32-64
8.1-10.3
108-350
.2-50.6
1.9-4.3
43.5(10.0)
8.6(.6)
291(53.7)
6.6(10.7)
2.6(.8)
GC01
42-54
8.2-10.7
128-132
.4-7.8
1.6-1.9
48
9.1
130
5.1
1.7
GC02
42-49
7.8-10.7
72-96
.3-.8
1.1-1.1
47
8.9
83
.6
1.1
GR01
32.5-69
7.2-10.6
170-324
1.2-93.6
2.0-4.3
46(12.9)
8.7(.7)
243(40.2)
13.5(18.6)
2.7(. 5)
HSCK01
52-70
8.2-8.6
576-715
7.1-28.6
1.1-1.1
61
8.4
642
17.1
1 .1
LFGOl
31-69
7.5-9.4
120-188
.2-122
1.6-4.0
43.5(12.4)
8.2(.36)
160(17)
16.0(29)
2.4(.7)
LBOl
34-59
7.9-8.4
98-100
4.2-6.9
1.1-1.6
46
8.2
99
5.4
1 .3
34
(continued)
-------
Table A-2. (continued)
pH Suspended
Temp. std. Conductivity solids Velocity
SITE °F units /jmhos/cm mg/1 ft/sec
MC01
49-55
8.2-9.0
195-264
294-1,708
1.6-1.6
51
8.5
230
794
1.6
NFG01
32-67
7.5-10.4
78-260
<.1-34.8
1.1-3.5
45(11.8)
8.6(0.7)
157(36)
10.0(9.0)
2.2 (.6)
0BJ01
39-48
8.1-9.3
49-82
1.8-2.4
1 .1-3.0
44
8.7
69
2.1
1.7
0HC01
49-65
8.3-8.7
330-400
.4-12.8
1 .1-1.6
59
8.5
367
5.1
1.3
QC01
35-53
8.0-10.7
149-193
.4-7.2
1 .9-3.5
46
9.1
167
2.4
2.7
QC02
42-49
8.2-10.6
102-149
1.8-2.8
1.9-2.9
45
9.1
126
2.2
2.3
SR01
32-63
7.2-9.2
84-220
.3-21.6
1.6-3.8
43(11.0)
8.1(.5)
176(48)
6.0(7.0)
2.3(1.1)
SR02
39-54
8.2-10.0
62-140
2.5-10.7
1.6-3.5
45
8.9
109
7.3
2.3
SR03
32-62
7.9-8.4
87-195
.7-15.8
1.1-3.2
46(12)
8.1 (.16)
145(44)
5.0(5.0)
1.7(.7)
TR01
32-59
7.6-10.7
109-158
^.1-6.7
2.2-2.9
41(8.8)
8.6(.8)
132(19.3)
3.2(2.2)
2.5(.4)
TR02
37-54
8.1-8.5
82-122
1.5-12.4
1.6-2.9
45
8.3
105
5.7
2.2
TEXCOl
40-54
7.9-8.3
56-76
.8-8.9
1.6-2.9
46
8.1
65
3.9
2.3
TC01
31-69
7.1-10.7
219-440
2.2-44.1
1.1-2.6
46(13.4)
8-4 (. 7)
310(60)
9.3(10.4)
2.0(.4)
TC02
50-62
7.4-8.5
450-564
3.0-23.9
1.6-2.5
55
8.0
495
11.7
1.9
TC03
32-56
7.8-10.3
107-240
1.1-74.0
1.1-1.6
40(9.2)
8.2 (. 7)
162(46.3)
10.6(20)
1.4(.3)
rtfCOl
40-53
8.0-8.3
127-148
1.9-87.4
1.1-2.2
46
8.1
134
31 .0
1.6
35
-------
Table A-3. NUTRIENT CONTENT
SITE
nh3-n
ppm
N05-N
ppm
PO^-P
ppm
TKN
ppm
ACOl
.15-.22
.04-.16
.00-.01
.7-1.1
.18
.07
.01
.9
BBOl
.30-.59
.10-. 34
.05-.11
.7-1.5
.46
.18
.08
1 .2
CEBOl
.01-.78
.01-.37
.04-.07
.2-.9
.36(.20)
.14(.12)
. 05 (. 01 )
.7
CEB02
.09-.68
.04-.30
.05-.06
.2-1.2
.29
.16
.05
.1
CEMCKOl
.29-.49
.01-.26
.00-.00
.7-1.1
.40
.11
.00
.9
CHACKOl
.26-.46
.08-.35
.07-.20
.8-1.0
.37
.23
.12
.9
COACKOl
.02-.73
.01-.33
.00-.12
.0-1.2
.34(.19)
. 10(.09)
.02(.03)
.8
CCNFOl
.14-.22
.02-.10
CM
O
•
1
0
0
.7-2.5
.19
.09
.01
1 .3
CRYOl
.20-.42
.02-.19
.00-.01
.6-.9
.30
.08
.00
.8
EROl
.02-.66
C01-.14
.00-.06
.7-1.7
.30(.15)
.11 (.08)
.02(.01)
.8
6C01
.04-.63
.10-.34
.00-.01
.6-.8
.37
.20
.01
.7
GC02
.15-.64
.06-.22
.00-.00
.2-1.0
.38
.16
.00
.6
GROl
.01-.59
A
0
1
ro
.01-.04
1 .1-1.5
.33(.18)
. 12(.09)
.02(.01)
1 .2
HSCKOl
.02-.41
.20-.26
.05-.09
1.0-1.9
.18
.23
.07
1.4
LFGOl
.07-1.02
.01-.57
.01-.05
.4-1.7
.27(.20)
.11 (.13)
.03(.01)
.9
LBOl
.29-.56
.06-.19
.02-.06
.7-1.5
.39
.12
.03
1.0
36
(continued)
-------
r-. 01
<3-
O
CM CO
O O
O
CM
in *3-
O r-
(Ti
CM
00 en
O r—
00
*3" "Xl
CO 1—
o o
O CM
o o
CM
CM
UD
O
V
00 CT>
cn i—
VO CM
<— co
o
o
o o
o o
un
I— 00
o o
CO
ld r~-
CM
o
o o
CM
LT)
•
I
O I—
CM 00
cn
CM
00 CO
i— CM
cn
LO
OO
O
I— CVJ
o o
CVJ
CNJ
LO 00
O r—
LO
P^. «?t"
r— CO
CO LO
CO
o
I
o
o o
o
CM
cvj in
KD
ID
00 00
I— CO
lo
LO •
. LO
V »—
lo
r^.
r- CO
O «d-
CNJ
lo
O CNJ
00
CO
CVJ vo
»— CVJ
00
I
<3- CVJ
O I—
CO I—
00 CNJ
• •
00
O CO
IT)
i-n.
i
CNJ ,
LO
oo
LO r—
CO O
O CO
UJ
,
o
o
o
CM
r—
CVJ
CO
,—
CNJ
o
p—
CVJ
CO
H-
o
o
T>
o
o
o
o
o
o
o
o
X
o
o
o
o
LL.
00
o
o
a:
cn
cn
cn
cn
UJ
o
o
o
00
21
z
o
o
or
cr
oo
00
oo
1—
h-
H-
h-
1—
• 00
00
CNJ
*3*
O*--*
o
S,
o ^
~ CVJ
i r-
f— o
•
r—
o
• f—
CVJ
1 o
o
1 o
o o
o
o
1
o
CNJ
1 o
o
t— •
•
r— •
• »
•
•
•
«
•
•
o
1
o
O—'
1 *—
1
1
o
1
1
• f—
o
•
• f—
o »—
o o
o o
•
CNJ
CO CT>
• CVJ
O 1—
vo
o
•
V
V o
•
o o
• •
o o
• •
o o
V
o
o o
V O
o o
o
CVJ
O CO
CVJ
lo
o co
o
o
-------
Table A-4.
MINERAL CONTENT - WATER - Part I
Na
K
Ca
Mg
SITE
mg/1
mg/1
mg/1
mg/1
AC01
2.0-4.0
o
o
V
12.0-42.0
2.0-3.0
3.0
1.0
27.0
2.5
BBOl
3.0-5.0
2.0-2.0
10.0-15.0
3.0-4.0
4.0
2.0
12.5
3.5
CEBOl
10.0-12.0
3.0-3.0
17.0-20.0
4.0-5.0
11.0
3.0
18.5
4.5
CEB02
3.0-5.0
2.0-3.0
11.0-15.0
2.0-3.0
4.0
2.5
13.0
2.5
CEMCKOl
2.0-4.0
1.0-1.0
45.0-52.0
12.0-15.0
3.0
1.0
48.0
13.5
CHACKOl
15.0-18.0
3.0-4.0
43.0-53.0
8.0-9.0
16.5
3.5
48.0
8.5
COACKOl
1.0-3.0
s
o
o
8.0-16.0
1.0-2.0
2.0
1.0
12.0
1.5
CCNFOl
5.0-6.0
o
o
•
V
13.0-14.0
3.0-3.0
5.5
1.0
13.5
3.0
CRY 01
1.0-2.0
<1.0- <1 .0
24.0-74.0
3.0-7.0
1.5
<1.0
49.0
5.0
ER01
4.0-4.0
A
0
1
o
45.0-55.0
8.0-10.0
4.0
1.0
50.0
9.0
GC01
1.0-2.0
A
0
1
h
o
16.0-17.0
6.0-6.0
1.5
< 1.0
16.5
6.0
GC02
1.0-1.0
<1.0-^1.0
0
1
o
4.0-5.0
1.0
<1.0
10.0
4.5-
GR01
4.0-7.0
1.0-2.0
35.0-50.0
8.0-12.0
5.5
1.5
42.5
10.0
HSCK01
82.0-143.0
5.0-8.0
12.0-16.0
2.0-4.0
112.0
6.5
14.0
3.0
LFG01
3.0-5.0
<1.0-1.0
18.0-25.0
3.0-4.0
4.0
<1.0
21.5
3.5
LB01
4.0-4.0
1.0-2.0
11.0-12.0
2.0-3.0
4.0
1.5
11.5
2.5
(continued)
38
-------
Table A-4. (continued)
Na
K
Ca
Mq
SITE
mg/1
mg/1
mg/1
mg/1
MC01
10.0-11.0
2.0-2.0
43.0-57.0
9.0-11.0
10.5
2.0
50.0
10.0
NFGOl
3.0-6.0
O
\/
1
o
*
V
11.0-17.0
2.0-3.0
4.5
-c 1.0
14.0
2.5
0B001
1.0-1.0
^1.0-^ 1.0
7.0-12.0
1.0-1.0
1.0
^1.0
9.5
1.0
OHCOl
6.0-6.0
1.0-3.0
54.0-56.0
13.0-14.0
6.0
2.0
55.0
13.5
QCOl
2.0-2.0
^ 1.0-1.0
22.0-28.0
6.0-8.0
2.0
^ 1.0
25.0
7.0
QC02
2.0-2.0
<1.0-1.0
16.0-21.0
4.0-5.0
2.0
-£ 1.0
18.5
4.5
SROl
2.0-5.0
^1.0-1 .0
14.0-33.0
2.0-6.0
3.5
^ 1.0
23.5
4.0
SR02
1.0-1.0
< 1.0-<-'1.0
12.0-22.0
1.0-2.0
1.0
^1.0
17.0
1.5
SR03
2.0-7.0
<-1.0-1.0
14.0-23.0
2.0-4.0
4.5
< 1.0
18.5
3.0
TROl
2.0-2.0
^1.0-1.0
15.0-20.0
5.0-6.0
2.0
< 1.0
17.5
5.5
TR02
2.0-2.0
1.0-1.0
11.0-17.0
3.0-5.0
2.0
1.0
14.5
4.0
TEXC01
1.0-2.0
^ 1.0- -'-1.0
9.0-11.0
1 .0-2.0
1.5
^1.0
10.0
1.5
TC01
9.0-10.0
2.0-3.0
53.0-54.0
14.0-15.0
9.5
2.5
53.5
14.5
TC02
7.0-24.0
1.0-3.0
14.0-55.0
6.0-18.0
15.5
2.0
34.5
12.0
TC03
3.0-4.0
1.0-1.0
18.0-18.0
4.0-5.0
3.5
1.0
18.0
4.5
WCOl
2.0-2.0
1.0-1.0
18.0-23.0
4.0-5.0
2.0
1.0
20.5
4.5
39
-------
Table A-5. MINERAL CONTENT - WATER - Part II
SO"2
F"
Cl"
B
SITE
pprti
ppm
ppm
i«j/l
ACOl
5.4-15.0
.120-.146
1.6-2.4
20-20
10.5
.129
1.9
20
BBOl
4.9-9.8
.101-.132
1.8-2.4
10-20
7.3
.122
2.1
15
CEBOl
7.4-19.4
.160-.740
1.4-5.0
30-30
10.6(3.2)
.339(.184)
3.0(1.6)
30
CEB02
7.8-11.2
.120-.144
1.4-1.9
10-10
10.1
.130
1.6
10
CEMCKOl
12.2-33.2
.101-.171
1.2-2.1
10-10
22
.144
1.7
10
CHACKOl
5.5-24.1
.360-.620
1.3-4.6
20-20
13.7
.510
2.7
20
COACKOl
6.4-82.4
<.100-.420
1.3-3.0
10-10
27.0(18.0)
.282(.109)
2.2(.6)
10
CCNFOl
4.7-7.3
.066-.078
1.5-1.9
10-20
6.0
.072
1.7
15
CRYOl
21.3-144
.130-.263
1.7-2.4
10-10
87.4
.210
2.0
10
EROl
16.3-45.5
C.100-. 225
1.6-2.6
10-10
26.7(6.7)
.168(.030)
2.0(.30)
10
GCOl
3.6-6.5
.170-.285
2.0-2.4
10-10
5.2
.230
2.3
10
GC02
3.3-4.4
.130-.160
1.5-2.4
10-10
3.7
.150
2.1
10
GROl
8.4-21.4
.180-.346
1.4-2.6
10-20
14.5(3.2)
.239(.040)
1.9 (. 4)
15
HSCKOl
86.5-142.9
3.80-16.1
9.1-16.4
30-60
120
9.6
13.8
45
LFGOl
15.4-31.0
.200-.350
1.4-2.9
10-10
26.3(4.4)
.257(.038)
2.1 (.45)
10
LBOl
4.2-4.4
.118-.130
1.6-2.7
10-10
4.3
.120
2.2
10
40
(continued)
-------
Table A-5. (continued)
SO42
F"
ci-
B
SITE
ppm
ppm
ppm
/^/l
MC01
6.0-6.4
.160-.235
1.8-2.6
20-20
6.2
.210
2.1
20
NFG01
5.3-23.6
-------
Table A-6.
HEAVY METALS
- WATER -
Part I
Total Concentrations
A1
As
Cd
Cr
Cu
SITE
/'j/!
>//l
AC01
77-92
<.5- <.5
< 5- < 5
<5- <10
< 5-16
84
<.5
<5
< 5
10
BBOl
< 50-173
0.5-0.8
< 5- <5
<5-<10
< 5-7
112
0.6
< 5
< 5
6
CEBOl
< 50-162
5.0-6.5
< 5- < 5
<5-< 10
< 5-< 5
106
5.8
< 5
5
<5
CEB02
99-162
<.5 --'.5
< 5- <5
<. 5- <10
< 5-5
130
< .5
< 5
< 5
<5
CEMCKOl
< 50-64
<. 5- <. 5
<5-^5
<5- <10
* 5- <5
57
<. . 5
< 5
<5
* 5
CHACKOl
<- 50-72
6.2-8.0
<5- <5
< 5- <10
<5- < 5
61
7.1
< 5
<5
< 5
COACKOl
231-241
3.5-3.7
<5- <5
<5- <10
<5- <5
236
3.6
< 5
< 5
5
CCNFOl
< 50-188
< .5- < . 5
<5- <5
<5- <10
< 5- < 5
119
< .5
< 5
< b
<5
CRYOl
123-130
<.5- <.5
<5- <5
<5- <10
<5-7
126
<.5
<5
< 5
6
EROl
< 50-< 50
. 5- <. 5
<5- <5
< 5- <10
< 5- < 5
< 50
<•5
5
< 5
< 5
GCOl
< 50- < 50
1.4-2.8
<5- <5
< 5- <10
<5- < 5
< 50
2.1
< 5
< 5
<5
GC02
< 50- < 50
< . 5- < . 5
<5- <5
<5- <10
<5- <5
< 50
<.5
<5
<5
<5
GROT
< 50-114
<.5-.5
<5- <5
<5-^10
<5- <5
82
<.5
< 5
<5
< 5
HSCK01
406-605
<.5-.7
< 5- <5
<5- <10
< 5-6
505
.6
<5
< 5
5
LFGOl
< 50-300
.7-.7
< 5- <5
< 5- <10
* 5- <5
175
.7
5
< 5
<5
LBOl
100-162
.7-.9
<5- <5
<5- <10
< 5- <5
131
.8
<5
<5
-------
Table A-6. (continued)
A1
As
Cd
Cr
Cu
SITE
*j/l
M5n
nn
,.j/i
'V1
MC01
3,380-5,100
<.5- <.5
<5- <5
< 5- <10
14-17
4,240
<.5
<5
< 5
16
NFGOl
110-275
<. 5-. 5
<•5- < 5
<5- <10
< 5- <5
192
<.5
< 5
<5
< 5
OBJOl
109-218
<. 5- <¦. 5
< 5- < 5
<-5- <10
5-11
163
<.5
< 5
< 5
8
OHCOl
< 50-< 50
<.5- <.5
< 5- < 5
< 5- <10
< 5- <5
< 50
<.5
<5
<5
< 5
QCOl
< 50-95
<. 5- <. 5
<5- < 5
<5- <10
< 5-<5
70
<.5
< 5
< 5
< 5
QC02
< 50- < 50
<.5- <.5
<5-< 5
<5- <10
< 5-8
< 50
<•5
<5
< 5
6
SROl
< 50-243
<.5-1.2
<5-<5
< 5- <10
<5-7
150
.8
< 5
< 5
6
SR02
87-122
< . 5- < . 5
<5-<5
<5- <10
<5-6
104
< . 5
< 5
<5
5
SR03
65-241
<.5-1.2
<5-<5
<5- <10
<5-8
153
.8
<5
<5
6
TR01
< 50- < 50
<.5- <.5
< 5- < 5
<5- <10
< 5- < 5
< 50
<.5
<5
<5
< 5
TR02
63-113
<.5- <.5
< 5- < 5
<5- <10
< 5- <5
86
<•5
<5
<5
< 5
TEXCOl
< 50-< 50
<.5- <.5
< 5- < 5
< 5- < 10
<5- <5
<50
<.5
<5
< 5
< 5
TCOl
< 50- < 50
1.1-1.3
<5-<5
< 5- < 10
<5-9
<50
1.2
<5
< 5
7
TC02
<50-70
<.5-.8
^5-< 5
< 5- <10
< 5- <5
<60
.6
<-5
< 5
<5
TC03
<50-64
-<.5- -<.5
< 5- <5
< 5- <10
<5- <5
57
< .5
< 5
< 5
<5
WCOl
<50-100
<.5- <.5
< 5-<5
<5- <10
<5-7
75
< .5
< 5
< 5
6
-------
Table A-7. HEAVY METALS - WATER - Part II
Total Concentrations
Fe
Mn
Pb
Zn
SITE
A,C^/l
^/1
.-uyl 1
AC01
76-156
7-11
<- 30-
-------
Table A-7.(continued)
Fe
Mn
Pb
Zn
SITE
ZAmJ /I
¦JAmJ /I
J~\
*cy / I
MC01
3,190-3,614
166-396
/ 30-35
38-39
3,402
281
32
38
NFGOl
201-362
10-23
< 30-< 30
2-16
281
16
< 30
9
OBJOl
126-128
40-61
<30--<30
160-463
127
50
<30
312
OHCOl
123-131
22-77
<30-<30
<2-18
127
50
< 30
10
QCOl
74-320
5-21
<30-< 30
4-9
197
13
<30
6
QC02
190-195
9-13
<30-30
3-11
192
11
<30
7
SROl
91-402
106-279
<^30-<30
206-378
246
192
<30
292
SR02
168-192
5-8
<30-< 30
11-13
180
6
< 30
12
SR03
145-349
327-791
<30-<30
415-889
247
559
<30
652
TROT
137-214
24-39
< 30-< 30
3-11
176
32
<30
7
TR02
166-744
6-26
<^0- <30
8-291
455
16
<30
150
TEXCOl
94-111
2-3
<30-< 30
^ 2-5
102
2
<30
3
TCOl
237-285
56-110
<30-<30
3-16
261
83
^ 30
10
TC02
176-524
53-463
<30-<30
< 2-14
350
258
^30
8
TC03
352-575
23-38
<30-<30
20-26
461
30
<30
23
WCOl
360-360
24-33
<30-<30
6-23
360
28
<30
14
45
-------
Marble
CRY01
MC01
Somerset
AC01
l 98 1-10 6
TR02 4
779-9?
10 0(1 4) 8 6-10
TLXfO!
-,8 6 B 0-9 0
Crested^
Butte
WL01
SR01
0HC01
ftlinoht/'
CR01 4% TR01
9 7(1 3)/ 10 OC l»
GC02
QC02
OCO]
n s 7
Gunnison
Pari in
f8 ®'TC01
v GR01 10 0(1 3)
9 9(1 M 0 9"12 1
HSCOl
LFGOl>
i) 7(l 4)
CHACKOl
SargentsjA TC03
BBOl
GUNNISON COUNTY
CEBOl
' 9 ?(l 6)
20 mi
Powderhorn
a Samplinq Sites
o Cities
mean (standard deviation) hiqn-low
Figure A-l Dissolved Oxygen Content of Surface Waters
46
-------
CRY01
Marble
MCOI
Somerset
COACKOI
TCXCO!
Crested'
Butte
CEMCKOl
WCO)
OHCOI
Almont/'
CR01«JR01
,• 1,(1 2)/? *' *
GC02
GfOl
Gunnison
.'r-' Pa r 1 in
IISCOl
TC02
LFGO!
CHACK01
Sarg^ntsj* TC03
.LBOl
Vi ft /
¦' 1 nl Ha\fway
I \House
BB01
GUNNISON COUNTY
CEB01
2,0 mi
Powderhorn
o Sampling Sites
o Cities
3-4
mean (standard deviation) high-low
Figure A-2 Biochemical Oxygen Demand (mg/1) Content of Surface Waters
47
-------
Marble
MC01
Somerset
fl1 51-125
TR02 I
23 9-V1
34 20-100
NFG01
93(347)
4-1,540
V SR03 (
^ I9(9j)
CrestedV •'
Butte \\
TEXC01.
Iytt 8-121
CEMCK01
WC01
0HC01
Almont
ER01
-------
Marble
CRY01
10 5-25
SR02
Somerset
TR02
V SR03 (
6(22)
CrestedX ^'-so
Butte \A
SR01®"
TEXC01
CEMCKOI
4 < i-io
WC01
0HC01
GC02
TR01
ER01
4(23 B)
GCOia
'QCQl
Gunnison
Pari in
HSC01
30 -i 1-285
1 370
CHACK01
) 7-278 ,
SarggntsjA TC03
15(291.1
JLlbov
BBOl vSV i' i '0
M 2-"' /Hakfway
I AHouse
GUNNISON COUNTY
\CEB01
V 1-140
Powderhorn
20 mi
a Sampling Sites
o Cities
mean (standard deviation) high-low
Figure A-4 Fecal Coliform
49
-------
CRY01 Marble
20 6-50
MC01
iq5 150-875
Somerset
fCNFOl
NFG01 <5 11-165
39(152]
1-735
C»rm1w
flBJOl
CEMCK01
57 11-175
OHCOl
Almont
243 S5-B0C
,\ 3„,CP^«0'tt^4R03
Crested
Butte
TR02
a i-?'
13 1 -20
)TEXC01
WC01
20 5-85
<:> ER01 dX TR01
\ 24(94 6)^^ 6^24 7)
1 ' 1-330 I ' ,"B3
GC02
3 8 j i-nj
GCOlS
13 6-20
„o„, _«.LBOV
BB01 •W*\05 45-300
"way
House
LFGOI
20(160)
2-720
Gunnison, ,
Pa r1 i n
*TC01
/ GR01 98046)
115(264) 17-450
15-1 310 i| 4M
CHACKOl'} 110-2.150
230 56-475
„ HSC01
\ TC^2^r,
CEB01
_J 68(207)
Powderhorn fjq-jso
Leboz
GUNNISON COUNTY
tOIH'jl
I irilt
i^QC02
ly ?-aQCQ1
15 'I-IJ7
10
20 mi
o Samp)1ng Sites
o Cities
mean (standard deviation) high-low
Figure A-5
Fecal Streptococcus
50
-------
CIMOl ^ Marble
44 41-49
MC01
51 49-55
jpnier"iOL
* AO« 101
. CCNFOI
I „„f'lr('01 SIM-Sol 51 4'-6'
*5(11 8)32-6/
„ rOACKOl
^ 6(7 (jj32
TEXCO:
Crestec."
Butte
SR01
43(U 0)32-
t" an-S4
CEMCKOI
44 39-54
0HC01
S949-65
Mmoht
LR01 aBL TR01
GC02
4 42-49
41 !>ll" 0)' 41(8 81
0C01
46 35
Gunni
HSCOl
61
CHACK01
40(9 ?) 12-Sl)
GUNNISON COUNTY
House
CEB01
n ^ v. 2
-------
CRY01 Marble
8 ? 7 7-8 7
MC01
8 5 8 2-9 0
Somerset
^08101
TRO?
B 3u 1
« ' ,
B 1-*) 3
CCNFOl
NFG01
i 1 n 1 10 5
LOACKOl
7 8(1
T! Ml
n i~ln ,)
1 '< 10 4
r rested
6 «-io •
Butte
CEMCK01
9 3 8 7-10 3
0HC01
fl ' R 3-B 7
Almont
\ CROl
B fit 4)
gen?
1 I 8 ?-IO 6
C01
9 I 8 0-10 7
Gunnison
CHACK01
LFGOI
TC03
R ?( 7) 7 K-10 1
BB01
h
i ri-io i I \House
GUNNISON COUNTY
0 5 ]£
20 mi.
CFRnl
7 R( 4)
PowderhornBy 7 2_a 6
a Sampling Sites
o Cities
mean (standard deviation) high-low
Figure A-7 PH (su) of Surface Waters
52
-------
Marbl e
I SR02V
\OBJOVs» 10.\
TOACKOI
' I ... c \ ¦
Somerset
NFG01 ,
SR03 )
n 145(44)
¦jooCres ted*®'"195
Butte \\
SKM®"
17SMR)
\ H4-220
CIMLK01
2Si 0-310
Alroo'
ER01 B
TR01
132(19 3)
109-158
108-350
CO!
Gunnison
>'TC01
HSC01
> 57
LFGOI
Sargents^A TC03
1«?(4& 3)
IC'-P-.O
JLlboi
BB01 99 98-100
<¦484-146 Ha Wway
I \House
GUNNISON COUNTY
20 mi
Powderhorn
a Sampling Sites
tEB02
"AlOO 86-13*
mean (standard deviation) high-low
Figure A-8 Conductivity (timho/cm) of Surface Waters
53
-------
CRY01Marble
MCO!
{794 /W-1 708
.OBJOl1
TR02
? 9U Bi
10 0(9 ol'
V SU03 I
0(5 0)
CrestedX 7r15 8
Butte \A
SR01®<
6 0(7 0) 1
3-21 6 1
TCXC01
CEMC KOI
WC01
0IIC01
GC02
TR01
3 2(2 2)
0C01
Gunnison
Parlin
P> otcoi
T'GROl 9 3(10 4)
13 5(18 6) 2 2-44 1
HSC01
TC02
LFGOI^*
vl6 0(291
\ 2-122
10 6(20) 1
Llbov
®\5 4 4 2-6
Ha\fway
\House
BB01
GUNNISON COUNTS
CEB01
2fi mi
Powderhorn
a SamplIng Sites
o Cities
mean (standard deviation) high-low
Figure A-9 Suspended Solids (mg/1) Content of Surface Waters
54
-------
r RYOl Marble
? 6 1 9-4 0
Somerset
OBJOI
5JC0ACK01
Mcrm CCNF01
NFG01 2 o
2 _2( 6) | 6_2 6
Tcxrn;
2 3 16-29
Crested
BuUe
CEMCKOl
15 11-19
OMCOI
13 11-1 6\ Almoht
i LK01 <« TR01
: 2 6( 8)/^ 2 5( 4)
I 9-4 31 2 2-2 9
Gunnison
^1" Pari in
TCOl
nrcoi 2 o( 4)
2 7( 5) 1 1-2 6
2 0-4 1
CHACK01
2 4 16-32
LFGOI
2 41 7)
I 6-4 0
BB01 3 11-16
i 6 |Ha\fway
2 \House
TC03
1 11 3)
I 1-1
GUNNISON COUNTY
CEB01
20 mi
Powderhorn i-? «
L.EB02
I Q-? 0
L 1
a Sampling Sites
o Cities
mean (standard deviation) high-low
Figure A-10.
Velocity (ft/sec) of Surface Waters
55
-------
Marble
CRY01K
30 20- 42
MC01
23 18- 29 SR02
~\0BJ01\o 29
Somerset
NFG01
5- 42
TR02
SR03
TEXC01
34M9U^---Sn,j
"•"^"^Crested'
~ Butte
ns- 87
CEMCK01
40 29- 49
WC01 ^
3b 07- 4?
SR01
39( 24)
16- 90
0HC01
Almoi
CROle
GC02
TR01
02- 66
QC02
GCOH
"QC01
M *18- 66
04- 63,
Gunnison
T* t> TC01
GR01 38( 21)
IISC01
TC02
LFGOlA
\ 27( 20) \
\ 07-1 02
CHACKOT
Sarg,entsj* TCQ3
Llbov
39 29- 56
Ha\fway
\House
BB01 i
46
30- 59
GUNNISON COUNTY
CEB01
' 36( 20)
\ 01- 78
20 mi
Powderhorn
a Sampling Sites
o Cities
mean (standaru deviation) high-low
Figure A-ll. Total Ammonia Nitrogen (mg/1) Content of Surface Waters
56
-------
Marble
CRY01 "
e 02- 19
MC01
08 oi- 15 SR02V
^XOBJOlVo 04 00- 08
Somerset
TR02
NFG01
10( 06)
TCXC01
:«~m- 33;rested'
~ Butte
CEMCKOI
SR01
20
0HC01
Almoj
LKOlC
I ( 08)3
TRO1
07( 07)
<01- 20
>^QC02
f 15 12-
OCOI
GCOli/
Gunnison
f WTCOl
GR01 1?( 06)
01- 27< 01- 23
12( 09)
IISC01
23 20- 26
LFGOI
CHACK01
Sargents
BB01
GUNNISON COUNTY
10- 34
CEB01
20 mi
Powderhorn
01- 37
a Sampling Sites
LEB02
"A 16
04- 30
mean (standard deviation) high-low
Figure A-12 Nitrate Nitrogen (mg/1) Content of Surface Waters
57
-------
CRY01 on no oi
°?< 03IC0ACK01
Crested
Cutte
CI.MCK01
UC01
oi oo- o?
SR01
OK 02
<01- 08
OO 00- 00
OHCOl
01 01- 02
Mmoht
GC02
oo no- oo
'> ER01 eft TP.01
^ 02( 01)7^ 00)
OO- 06 I °°- 01
GC01
01 00- 01
Gunnison
Pari in
TC01
GR01 02{ oi)
02( 01) <01-04
01- 04
IISC01
07
i TC02 ss.r
09 03- 20
LFGOI
03( 01)
LBOl' v 01' 05
BBOI «W\ 03 02- 06
XHACK01
12 07- 20
Saraents
02( oi)
< 01- 04
Haktway
06" 11 ' N House
GUNNISON COUNTY
CEB01
20 mi
il Powderhorn
05-^06
a Sampling Sites
o Cities
mean (standard deviation) high-low
Figure A-13 Phosphate Phosphorus (mg/1) Content of Surface Waters
58
-------
SM2
.OBJOl1
r -Nt on,AC,0,'
, ijn 1,1
SR03
COACKOl
i 0-1 2 i
TEXCO!
Crested l- 8
Butte
.SROl
CEMCK01
WC01
0HC01
Gunnison
.cr-' Par) in
TC01
HSC01
GR01
V TC02
LFGOI
CHACK01
SarqgntsJ* TCQ3
BB01
GUNNISON COUNTY
CEB01
20 mi
Powderhorn
a Sampling Sites
o Cities
mean (standard deviation) high-low
Figure A-14 Total Kjeldahl Nitrogen (mg/1 ) Content of Surface Waters
59
-------
Marble
MC01
(10 5 10
SR02
Somerset
.OBJOl'
TR02
NFG01
COACKOI
TCXC01
Crested^
But to
WC01
SR01
0HC01
GC02
¦QC01
Gunnison
-c""_ Parlin
T o'TCOl
GR01 9 59 0-10 0
HSC01 1
11? o
82 6-143 (I
Tcor
15 5
CHACKOrJ 7
II, 5 15 H-18 Oj
LFGOI
Sarggnts^* TCQ3
BB01
GUNNISON COUNTY
\ CEB01
nno
Powderhornjkoo o-i? o
20 mi
a Sampling Sites
o Cities
mean (standard deviation) high-low
Figure A-15 Sodium (mg/1) Content of Surface Waters
60
-------
CRY01 Marble
MC01
0 SR02 \
.OBJONp <' <>
Somerset
¦"tCNFOn^W!
TR02
NFbOl
V SR03 )
o^TH * 1 0
CrestedX °*' 0
Butte \\
SR01®\
C0ACK01
TEXC01
n-
-------
riiYOlK^Marblr
49 0 ^
2' 0-74 0 1
MCOl
Somerset
"AC01 \
27 O 1? 0-4? 0
12 0-22 0.
CCNFOV
( OACkOI
/
f r fjt of 111 ^ 0-23
liuLli \\
23 514 0-33 0
0-16 0
flM( KOI
48 0 45 0-52
win I
omul o\
G( IV
10 0
15 0-20 0
Q CD.
j^Qroi
6 1(01
(.1(0 I 53 5 53 Q-54
35 0-50 0
UB01
fillNMlSON COUNT Y
10 0-15 0
CCUOl
20 mi
Powderhorn
a S
-------
CRYOlV: Marble
MCOl
SRO?
Some r s e
-------
CRY01
87 4
21 3-H4
Marble
MC01
Somerset^
'Tr*i7"~frNFniV AC°l
iNFGOl C ' • I 10
i 5(3 7)
6 5 I SR02 \
.OBJOlVp 16 4^
TR02
15 0
V SR03 t
I—--o\ 29(1?)
CrestedX 8r,)
Butte \\
SROl®^
COACKOl
TEXCOl
CEMUOl
22
12 2-33 2
WC01
6-34 4
0HC01
ftlmont/'
LROl dBC TROT
26 7(6 7) 5 9
16 3-45 5 4 :
GC02
GCOl
Gunnison
Par) in
TCOl
' GROl
14 5(3 2)
TC02
CHACKOrl 39 3-9' 0
LFG01A
26 3(4 4)
\l5 4-31 0
Sarqents
TC03
BB01
GUNNISON COUNTY
CEBOl
' 10 6(3 2)
20 mi
Powderhorn
o Sampling Sites
o Cities
mean (standard deviation) hiyh-low
Figure A-19 sulfate (mg/1)Content of Surface Waters
64
-------
¦CRY01 ®
210
130- 263
Marble
MC01
> ?io
s 1G0- 23b
070- 105
090 I
"\0BJ01*
.R02
Somerset
070 x
070- 077 <
TR02 dl
231 >
200- 264
129
120- 146
INFGOI 07?
14U( 04U) 0f>6. 07R
100- c40
C0ACK01
'oo- 420 Crested'
v Butte
TEXC01
p^. i?0' '
100- i?o
270( 130)
)00- 420
CEMCK01
144
WC01
090
073- 101
SR01 ¦
210( 090)
120- 410
0HC01 M
250
/30- 283
Almonty/
v LR01«TR01
168( 030)
100- 225 ,
GCO 2
150
no- 160
l70( 0?2)
130- 203
GC01
230
f MO
'QCOl 130- 142
150
140- 163 J
Gunnison
Pa r 11 n
TC01
MSC01
9 6
3 80-16
GR01
2J9( 040)
IBO- 346
404 ( 088)
210- 560
TC02
H90-1 20
LFGOI A
25/( 038)
\ 200- 350
CHACK01
510 |
'"j€0- 620
BB01 120 118-
1?? 'Hakfway
ioi- 132 \House
Sarggntsjfc TCQ3
GUNNISON COUNTY
20 inl
Powderhorn
a Sampling Sites
o Cities
tEB02
mean (standard deviation) hiah-low
Figure A-20. F1uoride(mg/1) Content of Surface Waters
65
-------
Marble
MC01
1 y I SR02 \
¦OBJOlVn 2 2 2
Somerset
TR02
NFGOl
COACKOl
TEXCO!
Butte
CEMCKOl
WCOl
SROl
OHfOl
GC02
33)
f 2 0
•QC01
GC01
Gunnison
Par] in
•' TC01
MSC01
GR01
« Tcor-
5 3 1
CHACKOl'j ' 3"4 3
IFGOI
Llbov
WT 2 2 1 6-2
Halfway
\House
Saraents
TC03
BB01
GUNNISON COUNTY
CEB01
• 3 0(1 6)
Powderhorn
a Sampling Sites
mean (standard deviation) hin^-low
Figure A-21 Chloride (mg/1) Content of Surface Waters
66
-------
Marble
CRY01K
10 10-10
SR02\
¦g 10 10-10.
Somerset
TR02 A,
10 10-10
NFG01 IS 10-20 20 20-20
10 10-10 I
"¦ lo-io!.
C0ACK01
10 10-10JJ
Crested'
Butte
CEMCK01
10 10-10
WC01
10 10-10
AlmoJ
LROlt
GC02
0-10
10-101
GCOlJ
10 10-10
l'QC01
10 10-10
10-10
Gunnison
TC01
^o 20-20
HSC01
45 10-60
GR01
15 10-20
LFGOI^
00 10-10
CHACKOV
Sargents^A K03
10 10-10
BB01
GUNNISON COUNTY
10-20
CEB01
' 30 10-30
20 mi
Powderhorn
a Sampling Sites
o Cities
LEB02
10-10,
mean (standard deviation) high-low
Figure A-22. Boron (&g/l) Content of Surface Waters
67
-------
CRY01K
126 123-130
Marble
MCOl
f 4.Z40 3.380-5,100
163 I \
109-218; SR02 \
YOBJOlVplO' 87-122
Somerset
NFG01 119 so-issl84 '7'9Z
192 (
110-275 -A
SR03 (
W153 65-241
COACKOl
" 23I-241J
Crestetr
Butte
"CEMCKOl
57 50-64
WC01
75 50-100
SK01"\
lSH'50-243 1;
0HC01d
50 SO- 50
GC02
5050- 501
GCOH
50 50-
TC01
¦V IISC01
>• 505 406-605
I
CHACK01
61 M-721
Sargents
TC03
BB01
GUNNISON COUNTY
CEB01
• 106
\ < 50-162
20 mi
Powderhorn
a Sampl ing Sites
o Cities
mean (standard deviation) high-low
Figure A-23. Aluminum ing/1) Content of Surface Waters
68
-------
Marble
CRY01
MCOl
5SR02
Somerset
.OBJOV
TR02
NFGOl 55.
TEXCO!
Crested"
Butte
CEMCKOl
WCOl
SR01
OHCOl
Almoht
G.C02
GfOl
Gunnison
TCOl
IISCOl
% TCQ2
LFGOI
CHACK01
Sarqents
TC03
BBOl
o 5-0
GUNNISON COUNTY
CEB01
20 mi
Powderhorn
o Sampling Sites
o Cities
tEB02
mean (standard deviation) high-low
Figure A-24 Arsenic Uig/1) Content of Surface Waters
69
-------
CRY01
Marble
MCOI
5-11 1 SR02 \
^BJOTSp 5 5-6
Somerset
TR02
NFG01
COACKOl
TCXCOl
Crested'
Butte
CEMCKOl
WCOl
SROl
A lino]
TROl
¦qcoi
Gunnison
TC02
LFGOI
CHACKOl
Sarg^nts^ TCQ3
JLlbov
5- b
I-? I Ha\fway
I \House
BBOl
GUNNISON COUNTY
CEBOl
20 mi
Powderhorn
a Sampling Sites
mean (standard deviation) hiah-low
Figure A-25 copper Cng/1) Content of Surface Waters
70
-------
Marble
MC01
M.40<> 3.190-J.6I4
127126-128 SR02
'-"\OBJOI\d1801
Somer se
201-362 ,3° m [
TL'XCO!
Crested'
Cutte
HC01
360 360-360
0HC010
27 123-131
Almonty/
ER01 «TR01
68 176 I37-2M
46-901
^^002
f 192 190-195
'QC01
I97/74-32U ,
GC0)'®|
79 75-83
Gunnison
-1'"' Pari in
iy HSC01
£ 7 4 2 546-939
GR01 26' ?37"285
LFG01A
.208 49-367,
Sarqgntsj* TC03
461 W-57".
BB01 «
328
310-346
GUNNISON COUNTY
\ CEB01
f> 502
Powderhorn fc.4fla-5i5
20 mi
a Sampling Sites
o Cities
mean (standard deviation) hiqh-low
Figure A-26 Iron (tig/1) Content of Surface Waters
71
-------
CRY01 Marble
i66-396
I v
jomersel^
50 40-1
TR02
16 6-26
COACKOI
10-23
Crested1
Butte
•ZH'*
CEMCK01
OHCOl>
so 22-u
Almohty
ER01(« TR01
/* 8-39^32 24-39
GC02
OCOl
Gunnison
f¦BTC01
/GR01 ni 5fi-no
47 21-67
I TC02
* 258
,11 53-463
CHACKOV
Sargents
BB01 fLB°V .
42 34-50/ Hakfwav
I \House
' TC03
30 23-38
GUNNISON COUNTY
CEB01
148 43-53
20 mi
Powderhorn
a Sampl1ng Sites
o Cities
mean (standard deviation) high-low
Figure A-27 Manganese U
-------
CRY01
28 5-50
Marble
MCOI
f 38 38-39
Somerset
.0BJ01
TR02 t
150 8-291
9 2-16
SR03 (
H 652 415-1
TEXC01
Crested'
Butte
WC01
14 6-23
0IIC01
10 ^ 2-
GC02
¦QC01
Gunnison
Pari in
P*6'TCOl
'GR01 10 3-16
17 6-28
HSC01
10 4-17
LFGOI^
S.42 41-43
CHACKOV
5< 2-8 i
SarqentsjA TC03
23 20-26
BB01
GUNNISON COUNTY
CEB01
• 37 3-71
20 mi
Powderhorn
a Sampling Sites
o Cities
mean (standard deviation) hiqh-low
Figure A-2d Zinc (>g/l) Content of Surface Waters
73
-------
Table A-8. MINERAL CONTENT - SEDIMENT
Na
K
Ca
Mg
B
SITE
mg/g
mg/g
mg/g
mg/g
/g
ACOl
200
772
2,803
1 ,831
21
BBOl
510
868
3,128
1 ,548
30
CEBOl
197
880
2,202
1 ,160
22
CEB02
416
1,304
3,178
1 ,798
24
CEMC KOI
72
384
7,496
2,268
11
CHACKOl
80
1 ,306
3,218
2,877
21
COACKOl
182
CO
00
O
3,551
2,482
36
CCNFOl
291
969
3,335
2,292
26
CRYOl
78
620
6,878
2,117
21
EROl
242
438
2,296
1 ,136
10
GCOl
69
390
1 ,227
1 ,267
15
GCOl
112
816
2,918
4,898
33
GROl
614
629
4,118
1 ,464
18
HSCKUl
362
600
1 ,998
978
12
LFGOl
543
1 ,006
2,992
6,086
19
LBOl
184
685
1 ,487
941
14
74
(continued)
-------
Table A-8.
(continued)
SITE
Na
mg/g
K
mg/g
Ca
mg/g
Mg
mg/g
B
<"9 /g
MC01
284
554
2,427
1 ,787
15
NFGOl
325
785
5,647
2,243
22
OBJOl
559
937
3,232
2,992
30
OHCOl
200
550
4,884
2,082
17
QCOl
69
640
5,339
1 ,490
14
QC02
60
438
1 ,818
1 ,651
16
SROl
316
410
2,472
1 ,483
16
SR02
543
1 ,006
5,432
6,086
302
SR03
355
561
2,884
2,013
20
TROl
76
717
1 ,963
1 ,485
15
TR02
116
879
2,261
1 ,581
23
TEXCOl
66
754
1 ,320
1 ,362
16
TCOl
163
931
5,777
1 ,839
15
TC02
196
198
5,190
3,538
40
TC03
106
759
1 ,947
988
15
WCOl
168
664
4,556
75
2,808
32
-------
Table A-9. HEAVY METALS - SEDIMENT - Part I
AT As Cd Cr Cu
SITE Xuj /g jog /g //y/g V/y/g
AC01 7,193 2.1 0.22 2.2 6.6
BB01 4,932 3.6 0.27 3.3 7.4
CEB01 2,846 16.5 0.26 0.53 4.5
CEB02 4,796 1.8 0.51 1.0 6.4
CEMCKOI 2,717 2.3 0.36 3.6 2.5
CHACK01 ' 6,130 2.1 0.38 4.6 28.0
C0ACK01 5,923 12.7 0.55 4.7 7.7
CCNF01 3,335 2.4 0.62 2.5 7.8
CRY01 4,300 5.2 0.65 2.3 11.3
ER01 4,125 3.8 1.21 2.8 8.8
GC01 2,667 29.5 0.09 3.2 15.4
GC02 7,755 1.7 1.02 8.2 17.0
GR01 4,768 2.0 0.84 1.7 5.7
HSCK01 2,900 1.3 0.33 2.2 5.3
LFG01 4,329 5.4 2.60 1.4 40.1
LB01 3,829 2.7 0.21 1.3 3.8
76
vcontinued)
-------
Table A-9. (continued)
A1
As
Cd
Cr
Cu
SITE
xt/j /g
/g
^/g
"9
/g
MC01
7,544
-
1.22
5.7
17.0
NFGOl
5,537
1.9
0.28
3.4
7.4
OBJOl
12,234
11.2
6.00
9.8
33.0
OHCOl
4.102
0.9
0.22
0.2
11.0
QCOl
5,641
1.6
0.16
3.3
7.1
QC02
3,278
1.7
0.48
2.4
11 .0
SROl
6,572
9.8
5.40
5.5
24.0
SR02
19,382
15.4
1 .85
21 .0
38.0
SR03
8,529
12.3
1.65
6.6
20.2
TROl
3,216
2.3
0.19
3.5
4.9
TR02
4,614
5.1
0.88
4.2
7.2
TEXCOl
3,136
0.5
0.17
3.2
4.2
TCOl
3,683
1 .9
0.45
3.3
8.9
TC02
9,447
7.5
1.50
11 .0
33.0
TC03
3,258
2.7
0.43
3.2
9.1
WCOl
7,480
2.4
0.80
10.0
60.0
-------
Table A-10. HEAVY METALS - SEDIMENT - Part II
Fe
Mn
Pb
Zn
SITE
Mjyl g
y^/g
,^,/g
-ay! g
AC01
7,610
213
12.3
31.0
BBOl
10,310
510
10.7
30.0
CEBOl
7,846
383
6.6
18.6
CEB02
8,699
301
10.2
28.0
CEMCKOl
4,638
145
6.2
15.0
CHACKOl
8,506
199
28.0
69.0
COACKOl
8,733
250
12.0
28.0
CCNFOl
10,404
239
19.2
46.0
CRYOl
7,300
206
14.0
37.0
EROl
3,698
411
12.5
185.0
GCOl
5,218
219
105.0
95.0
GC02
13,265
602
21.0
57.0
GROT
7,110
173
15.0
107.0
HSCKOl
4,233
210
14.0
33.0
LFGOl
6,854
535
238.0
287.0
L BO 1
5,232
219
8.1
19.0
(continued)
78
-------
Table A-10. (continued)
Fe
Mn
Pb
Zn
SITE
UUj-l g
My /g
MC01
5,853
303
40.0
235.0
NFGOl
8,051
206
14.0
31.0
OBJOl
10,381
796
278.0
681.0
OHCOl
6,408
93
6.4
20.0
QCOl
5,214
188
7.4
20.0
QC02
5,766
182
10.0
38.0
SROl
5,515
1 ,125
30.0
883.0
SR02
12,778
198
99.0
246.0
SR03
7,334
402
39.0
246.0
TROl
5,497
172
16.0
27.0
TR02
7,561
612
24.6
101.8
TEXCOI
5,542
246
11.0
22.0
TCOl
5,334
232
14.0
31.0
TC02
13.920
668
49.0
132.0
TC03
4,849
390
18.0
67.0
WCOl
11,520
620
24.0
120.0
79
-------
Table A-ll. AVERAGE PARAMETER VALUES
Gunnison County STORET Data
STORET
# of
Para-
Measure-
Parameter
meter #
ments Range
Average
Turbidity (Transmittance)
00074
77
92-98%
96%
Turbidity (FTU)
00076
223
< 1-432 FTU
8.3 FTU
Conductivity
00094
404
50.0-1200.0 ^mho
208.0 /^mho
Dissolved Oxygen (DO)
00300
212
513-10.4 mg/1
8.1 mg/1
Biochemical Oxygen Demand (BOD^
) 00310
112
1.17-1.63 mg/1
1.4 mg/1
COD (Low Level)
00335
4
30.0 mg/1
30.0 mg/1
PH
00400
377
3.0-8.8 su
7.9 su
co2
00405
29
0.8-19.0 mg/1
7.3 mg/1
Total Alkalinity (CaCOg)
00410
114
0.108.0 mg/1
74.4 mg/1
Phenolphthelien Alkalinity
00415
18
0-20.0 mg/1
4.4 mg/1
Bicarbonate A1kalinity (CaC03)
00425
39
26.0-202.0 mg/1
110.5 mg/1
HCO3 Ion
00440
44
12.0-132.0 mg/1
77.5 mg/1
CO3 Ion
00445
10
0-4.5 mg/1
0.4 mg/1
Residue, total
00500
53
1.0-200.0 mg/1
133.0 mg/1
Residue, Volatile, total
00505
61
3.0-47.3 mg/1
20.8 mg/1
Suspended Solids-Non Filterable
00530
126
3.0-24.0 mg/1
14.0 mg/1
Residue, Settleable
00545
50
0.1 mg/1
0.1 mg/1
Organic N, diss
00607
2
0.060 mg/1
0 .060 mg/1
NHg-N, diss
00608
27
0.02-0.64 mg/1
0.19 mg/1
NH3-N, total
00610
254
0.02-2.90 mg/1
0.09 mg/1
NO2-N, diss
00613
2
0-0.010 mg/1
0.005 mg/1
NO2-N, total
00615
163
0.001-0.040 mg/1
0.002 mg/1
(continued)
-------
Table A-ll. (continued)
Parameter
STORET
Para-
meter #
# of
Measure-
ments
Range
Average
NO^-N, diss
00618
13
0.08-1.0 mg/1
0.49 mg/1
NO3-N, total
00620
364
< 0.10-0.24 mg/1
0.07 mg/1
Kjeldahl N, diss
00623
2
0.14 mg/1
0.14 mg/1
Total Kjeldahl N
00625
86
0.020-11.16 mg/1
1.19 mg/1
I^+NOg-N, total
00630
85
0.02-24.7 mg/1
1.27 mg/1
NO2+NO3-N, diss
00631
13
0.01-0.19 mg/1
0.08 mg/1
PO4, total
00650
124
0.077-0.183 mg/1
0.123 mg/1
PO4, Ortho
00660
15
0.030-1.00 mg/1
0.136 mg/1
Phosphorus, total
00665
163
0.017-6.87 mg/1
0.344 mg/1
Phosphorus, diss
00666
6
0.010-0.015 mg/1
0.013 mg/1
Phosphorus Ortho, diss
00671
96
0.006-4.71 mg/1
0.333 mg/1
Phosphorus Hydro, diss
00672
2
0-0.015 mg/1
0.008 mg/1
Phosphorus Organic, diss
00673
2
0.00 mg/1
0.00 mg/1
Organic Carbon, C, diss
00681
2
5.10 mg/1
2.55 mg/1
Cyanide, CN~, total
00720
68
0.00 mg/1
0.00 mg/1
Total Hardness, CaCO^
00900
293
15.0-470.0 mg/1
117.0 mg/1
Carbonate Hardness, CaCOg
00901
39
36.0-162.0 mg/1
93.0 mg/1
Non Carbonate Hardness, CaCOg
00902
29
0.00-390.0 mg/1
41.3 mg/1
Calcium, CaC03
00910
178
54.4-120.1 mg/1
89.2 mg/1
Calcium, Ca, diss
00915
29
5.0-170.0 mg/1
29.7 mg/1
Magnesium, CaCOg
00920
178
6.4-10.1 mg/1
8.4 mg/1
Magnesium, Mg, diss
00925
32
0.00-12.0 mg/1
4.3 mg/1
Sodium, Na, total
00929
185
2.58-8.89 mg/1
5.25 mg/1
81
(continued)
-------
Table A-ll. (continued)
Parameter
STORET # of
Para- Measure-
meter # ments Range
Average
Sodium, Na, diss
00930
28
1.0-160.0 mg/1
8.48 mg/1
Sodium, Na, Adsorption Ratio
00931
194
0.00-18.00
0.30
Sodium, Na, %
00932
11
1.0-93.0%
16.8%
Potassium, K, diss
00935
13
0.00-10.00 mg/1
1.65 mg/1
Chloride, CI"
00940
229
0.20-10.0 mg/1
4.7 mg/1
Sulfate, SO^, total
00945
178
3.4-390.0 mg/1
26.5 mg/1
Sulfate, SO^, diss
00946
35
5.0-30.0 mg/1
13.8 mg/1
Fluoride, F", diss
00950
13
0.10-18.00 mg/1
1.55 mg/1
Fluoride, F~, total
00951
129
0.234-0.442 mg/1
0.300 mg/1
Silica, diss
00955
13
3.8-130.0 mg/1
17.1 mg/1
Arsenic, As, diss
01000
17
0. 00-6 . OyCtJf /I
0.94,^/1
Arsenic, As, total
01002
119
0.00
0.00
Boron, B, diss
01020
1
70.0^y/l
70. 0^^/l
Boron, B, total
01022
167
7.1-19.5^/1
11.6/U^/l
Cadmium, Cd, diss
01025
36
0.00-57.3^/1
7 . 0;Ujl 1
Cadmium, Cd, total
01027
114
0.00-0.18^/1
o.ooi,t£yi
Chromium, Hex-Val
01032
126
0.00
0.00
Cobalt, Co, diss
01035
10
0.00-10.0^/1
1.4,^/1
Copper, Cu, diss
01040
33
•
O
C\J
r—
1
V
15.2,^/1
Copper, Cu, total
01042
138
0.00-275.0^/1
8.5 ijf/j 1
Iron, Fe, total
01045
195
60.3-32,000.0^/1
433./I
Iron, Fe, diss
01046
36
10.0-1400.0^/1
138.6.^/1
(continued)
-------
Table A-ll.
(conti nued)
Parameter
STORET # of
Para- Measure-
meter # ments Range
Average
Lead, Pb, diss
01049
34
1.0-1130.0^/1
58.8^/1
Lead, Pb, total
01051
126
0.00-11.3^/1
4.0/^/1
Manganese, Mn, total
01055
189
13.0-100,000.0 xu? /1
805.6 /f^y/l
Molybdenum, Mo, diss
01060
9
0.00-<333.0 1
333.0,/6-i/I
Molybdenum, Mo, total
01062
58
0.00-4.3/<^/l
1.6^/1
Nickel, Ni, diss
01065
27
0.00-24.3^/1
4. 5/u/ /]
Nickel, Ni, total
01067
12
25.0-37.5^/1
31 .1 At.fi \
Silver, Ag, diss
01075
11
0.00
0.00
Silver, Ag, total
01077
62
0.00-0.9^/1
0.2^/1
Zinc, Zn, diss
01090
34
0.00-100,000.0/^/1
4,543.0^/1
Zinc, Zn, total
01092
181
5.6-8050.0 ,wjl 1
207.0^;/l
Lithium, Li, diss
01130
1
210.0^/1
210.0/,f;/l
Selenium, Se, diss
01145
8
0.00-6.0,^/1
0.75/6<^/l
Selenium, Se, total
01147
122
0.2-0.6 l^ /I
0. 3/^/1
Detergent Suds, Severity
01305
3
0.00
0.00
Turbidity, Severity
01350
13
0.00-2.0
0.31
Total Coliform - MPN, Conf
31505
219
187-7,489 col/100ml
3,267 col/100ml
Fecal Coliform - MPN, EC,
Med
31615
248
0-1 ,087 col/100ml
356 col/lOOml
Fecal Streptococci - MPN,
K.F.Br)31675
18
13-595 col/lOOml
221 col/lOOml
Chlorophyl1, A
32217
12
4.6-11.6^/1
6.8/]
MBAS
38260
126
0.00
0.00
Algae, total
60050
3
760-2,300 cells/ml
1 ,520 cells/ml
(continued)
83
-------
Tab! e A-l 1.
(continued)
Parameter
STORET
Para-
meter #
# of
Measure-
ments
Range
Average
Ammonia, NH^, diss
71846
2
0.11,^/1
0.06/^/1
Nitrate, NO", total
71850
8
1 mg/1
^1 mg/1
Nitrate, NO^, diss
71851
2
0.38 mg/1
0.19 mg/1
Nitrite, NO^ diss
71856
2
0.03 mg/1
0.02 mg/1
Mercury, Hg, diss
71890
12
0.00-1 .0^;//l
0.2/t?/l
Mercury, Hg, total
71900
34
0.00-0.2/^/1
0.1^/1
84
-------
REFERENCES
1. U.S. Environmental Protection Agency, Methods for Chemical Analyses of
Water and Wastes, Methods Development and Quality Assurance Research
Laboratory, National Environmental Research Center, Cincinnati, Ohio.,
1974. EPA-625-/6-74-003. 298 pp.
2. American Public Health Association, American Water Works Association and
Water Pollution Control Federation, Standard Methods for the Examination
of Water and Wastewater, 14th Edition, 1975. 1193 pp.
3. Four Corners Environmental Research Institute, Biological and Chemical
Studies of Selected Reaches and Tributaries of the Colorado River in the
State of Colorado, Prepared for the Colorado Department of Public Health,
Denver, Colorado, 1976. 95 pp.
4. Water Quality Control Division, Colorado Department of Public Health, The
Upper Gunnison River Drainage, October, 1975. 70 pp.
5. U.S. Department of the Interior, Bureau of Reclamation, Water Measurement
Manual, 2nd Edition. Cat. No. I 27.19/2: W29/2/974.
6. Water Quality Control Commission, Colorado Department of Public Health,
Water Quality Standards and Stream Classification, Adopted: January 15,
1974; Effective: June 19, 1974. 52 pp.
7. Water Quality Control Commission, Colorado Department of Public Health,
Water Quality Standards for Colorado, Adopted: May 2, 1978; Effective:
July 20, 1978.
85
i
------- |