U.S. ENVIRONMENTAL PROTECTION AGENCY
          NATIONAL EUTROPHICATION SURVEY
                   WORKING PAPER SERIES
                                          REPORT
                                 wuB"
AGO
IR
LORADO,
                               SAN JUAN AND ffiOJRBIBA COUNTIES,
                                   EPA REGIONS VI AND VIII
                                    WORKING PAPER No, 775
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
                            and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA

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                                       REPORT
                                         ON
                                  p/A.in
                            ARCHULE
                         SAN JUAN AND RIffMBA COUNTIES,
                              EPA REGIONS VI AND VI11
                               WORKING PAPER No, 775
           WITH THE COOPERATION OF THE
          COLORADO DEPARTMENT OF HEALTH,
THE NEW MEXICO ENVIRONMENTAL IMPROVEMENT AGENCY,
                    AND THE
            COLORADO NATIONAL GUARD
                   JULY, 1977

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                               CONTENTS
                                                           Page
  Foreward                                                   ii
  List of Colorado Study Lakes and Reservoirs                iv
  Lake and Drainage Area Map                                  v

  Sections
  I.  Conclusions                                             1
 II.  Lake and Drainage Basin Characteristics                4
III.  Lake Water Quality Summary                             5
 IV.  Nutrient Loadings                                      9
  V.  Literature Reviewed                      '             15
 VI.  Appendices                                            16

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                                 n
                          FOREWORD
    The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to freshwater lakes and
reservoirs.

OBJECTIVES

    The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.

ANALYTIC APPROACH

    The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:

        a.  A generalized representation or model relating
    sources, concentrations, and impacts can be constructed.

        b.  By applying measurements of relevant parameters
    associated with lake degradation, the generalized model
    can be transformed into an operational representation of
    a lake, its drainage basin, and related nutrients.

        c.  With such a transformation, an assessment of the
    potential for eutrophication control can be made.

LAKE ANALYSIS

    In this report,  the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented.   The report is formatted to provide state environmental
agencies with specific information for basin planning [§303(e)j,  water
quality criteria/standards review [§303(c)],  clean lakes [§314(a,b)],
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal  Water Pollution Control  Act Amendments of 1972.

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                                   m
    Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
fresh water lakes.  Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.

ACKNOWLEDGEMENT

    The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Colorado Department of
Health and the New Mexico Environmental Improvement Agency for
professional involvement, to the Colorado National Guard for
conducting the tributary sampling, and to those Colorado waste-
water treatment plant operators who voluntarily provided effluent
samples.

    The staffs of the Colorado Water Quality Control Division and
the New Mexico Water Quality Division provided invaluable lake
documentation and counsel during the Survey, reviewed the prelimi-
nary report, and provided critiques most useful in the preparation
of this Working Paper.

    Lt. Colonel Paul A. Parsons, the Deputy Adjutant General of
Colorado, and Project Officer Colonel Hershel C. Yeargan, who
directed the volunteer efforts of the Colorado National Guardsmen,
are also gratefully acknowledged for their assistance to the Survey.

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                                iv
                  NATIONAL EUTROPHICATION SURVEY
                    STUDY LAKES AND RESERVOIRS
                        STATE OF COLORADO
NAME
Barker
Barr
Blue Mesa
Cherry Creek
Cucharas
Dillon
Grand
Green Mountatn
Hoi brook
Meredith
Milton
Navajo
Shadow Mountain
COUNTY
Boulder
Adams
Boulder
Arapohoe
Huerfano
Summi t
Grand
Summit
Otero
Crowley
Weld
Archuleta, CO; San
Juan, Rio Arriba, NM
Grand

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NAVAJO RESERVOIR
<•> frihutary Sampling Site
ij Sewage Treatment Facility
f^_»[)r
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                             NAVAJO RESERVOIR
                             STORE! NO. 0812

I.  CONCLUSIONS
    A.  Trophic Condition:
            Survey data indicate that Navajo Reservoir is mesoeutrophic.
        It ranked eighth in overall trophic quality among the 13 Colorado
        lakes and reservoirs sampled in 1975 when compared using a com-
        bination of six parameters*.  Six of the water bodies had less
        median total phosphorus, seven had less median dissolved ortho-
        phosphorus, ten had less median inorganic nitrogen, none of the
        others had less mean chlorophyll a_, and seven had greater mean
        Secchi disc transparency.  Some depression of dissolved oxygen
        with depth occurred at stations 2, 3, and 4 in September.
            Survey limnologists did not observe any nuisance concentrations
        of algae during sampling visits.
    B.  Rate-Limiting Nutrient:
            The algal assay results are not considered representative of
        conditions in the reservoir at the times the samples were collected
        (04/30/75 and 09/30/75) due to significant changes in nutrient con-
        centrations in the samples during shipment from the field to the
        laboratory.  The reservoir data indicate phosphorus limitation in
        April at stations 1, 3, and 5 and in August at stations 3 and 5.
        Nitrogen limitation is indicated at all other sampling stations
        and times.
* See Appendix A.

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                                 2
C.   Nutrient Controllability:
        1.   Point sources—During the sampling year,  point sources
    accounted for 1.6% of the  total  phosphorus input  to Navajo  Reser-
    voir.   The wastewater treatment  plants at Ignacio and Bayfield
    contributed 0.3% and 0.2%  of the total,  respectively.  The  muni-
    cipal  facility at Pagosa Springs was estimated  to have contributed
    the remaining 1.1%.
        The present phosphorus loading of 2.50 g/m2/year is 2.6 times
    that proposed by Vollenweider (Vollenweider and Dillon, 1974)
    as a eutrophic loading (see page 14).   A 62% reduction of phos-
    phorus  inputs would be necessary to lower the loading to less
    than a  eutrophic loading.   This  would require control of phos-
    phorus  from non-point sources in the drainage basin in addition
    to point-source control.
        2.   Non-point sources--Non-point sources contributed 98.4%
    of the  total  phosphorus load during the sampling  year.  The San
    Juan River contributed 34.0%, the Piedra River contributed  36.1%,
    and six other gaged tributaries  collectively contributed 7.9%.  The
    ungaged minor tributaries  and immediate drainage  contributed an
    estimated 19.8%.
        The phosphorus export  rates  of the San Juan River, Piedra
    River,  Spring Creek, and Unnamed Creeks  D-l  and F-l  were signifi-
    cantly  higher than the rates of  the other tributaries in the
    drainage basin (see page 13).  In a previous report,  it is

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                             3
noted that part of the flow in Spring Creek is due to irrigation
return flows, and that water is diverted from the San Juan,
Piedra, and Los Pinos rivers for the irrigation of approximately
189 km2 (Anonymous,  1975).   It is likely that irrigation return
flows contribute to  the excessive phosphorus loading of Navajo
Reservoir.  An additional  investigation is needed to determine
the contribution and controllability of non-point-source nutrients.

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II,
RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS

A.  Morphometry  :

    1.   Surface area:  63.25 kilometers2.

    2.   Mean depth:   33.3 meters.

    3.   Maximum depth:  39.6 meters.

    4.   Volume:  2,108.034 x Itf  m3.

    5.   Mean hydraulic retention time
                                                 t
         Tributary and  Outlet:
         (See Appendix  C for flow data)

         1.   Tributaries -
             Name

             San  Juan  River
             Piedra  River
             Sambrito  Creek
             Unnamed Stream D-l
             Los  Pinos River
             Unnamed Stream F-l
             Unnamed Stream G-l
             Unnamed Stream H-l
             Unnamed Stream 0-1
             Spring  Creek
             Minor tributaries  &
              immediate drainage -
                            Totals
         2.
                                             1.4 years.
Drainage
area (km2)*
3,185.7
1,629.1
46.6
20.7
1,320.9
18.6
11.4
17.4
23.3
150.2
1,956.3
8,380.2
Mean flow
(m3/sec)*
17.440
14.720
0.064
0.010
5.620
0.052
0.028
0.040
0.092
0.336
11.058
49.460'
        Outlet -

        San Juan River

    Precipitation****:

    1.   Year of sampling:   54.0 centimeters.

    2.   Mean annual:   47.2 centimeters.
                                                 8,443.4***
49.460
 t  Table of metric  conversions—Appendix  B.
 tt Anderson,  1974.
 *  For  limits  of accuracy,  see  Working  Paper  No.  175,  "...Survey  Methods,
   1973-1976".
 ** Sum of inflows  adjusted to  equal  outflow.
 *** Includes  area  of  reservoir.
 **** See Working Paper  No.  175.

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                                       5
III.   WATER QUALITY SUMMARY
      Navajo Reservoir was sampled three times  during the  open-water
  season of 1975 by means of a pontoon-equipped Huey helicopter.   Each
  time,  samples for physical  and chemical  parameters were  collected
  from a number of depths at five stations on the  reservoir in  April
  and seven stations in August and September (see  map,  page v).   During
  each visit,  a single depth-integrated (4.6 m  to  surface) sample
  was composited from the stations for phytoplankton identification
  and enumeration;  and during the first visit,  a single 18.9-liter
  depth-integrated sample was composited for algal  assays.  Also  each
  time,  a depth-integrated sample was  collected from each  of the  stations
  for chlorophyll  a_ analysis.  The maximum depths  sampled  were  64.0
  meters at station 1,  22.9 meters at  station 2, 64.0 meters at station
  3,  53.3 meters at station 4, 67.1  meters at station 5, 10.7 meters
  at  station 6, and 32.0 meters at station 7.
      The sampling results are presented in full in Appendix D  and
  are summarized in the following table.

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TEMP 

OISS GXY (MG/L)

CNDCTVY (MCROMO)

PH (STAND UNITS)

TOT ALK (MG/L)

TOT P (MG/L)

09THO P (MG/L)

N02»N03 (MG/L)

AMMONIA (MG/L)

KJEL N  (MG/L)

iNOftG N (MG/L)

TOTAL N 

CHLSPYL A (UO/D

5ECCHI  (METERS)
       A. SUMMARY Oh  PHYSICAL


       1ST SAMPLING (  4/30/75)

             5 SITES

     RANGE        MEAN'   MEDIAN

  4.3  -   8.5     6.3     6.4

  8.0  -   9.4     9.1     9.2

 169.  -  307.    209.    191.

  7.7  -   8.2     8.1     8.1

  76.  -   94.     89.     88.

0.01*  - 0.144   0.039   0.028

0.007  - 0.020   0.011   0.010

0.100  - 0.160   0.124   0.120

0.020  - 0.064   0.029   0.030

0.200  - 0.500   0.291   0.300

0.130  - 0.210   0.153   0.140

0.310  - 0.660   0.415   0.410

  0.5  -   9.0     2.3     0.6

  0.2  -   0.9     0.5     0.4
        C-iA^ACTES I ST ICS FOK i\Av'AJG
STORCT CODE 0812

          2ND SAMPLING ( 3/18/75)

                7 SITES

        •^ANGE        MEAN   MEDIAN

     4.2  -  21.1    14.5    17.2

     3.8  -   7.4     6.2     6.4

     96.  -  227.    176.    186.

     7.4  -   8.6     7.9     7.9

     49.  -   93.     71.     70.

   0.012  - 0.084   0.032   0.028

   0.002  - 0.040   0.011   0.010

   0.020  - 0.560   0.081   0.040

   0.020  - 0.030   0.020   0.020

   0.200  - 0.500   0.249   0.200

   0.040  - 0.580   0.101   0.060

   0.220  - 0.760   0.330   0.280

     1.4  -   1.9     1.6     1.5

     0.2  -   4.6     2.6     2.4
       3RU SAMPLING  ( 9/30/75)

             7 SITES

     RANGE        MEAN   MEDIAN'

  9.7  -  19.0    16.4     18.1

  4.8  -   6.6     6.6     6.7

  94.  -  163.    158.     lf>2.

  7.6  -   8.1     7.9     7.9

  53.  -  107.     76.     73.

0.010  - 0.043   0.025   0.024

0.003  - 0.025   0.012   0.010

0.020  - 0.220   0.076   0.040

0.020  - 0.030   0.020   0.020

0.200  - 0.400   0.250   0.200

0.040  - 0.240   0.097   0.065

0.220  - 0.580   0.326   0.305

  1.5  -   5.9     2.7     1.6

  0.3  -   3.0     1.4     1.5

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    B.  Biological Characteristics:

        1.  Phytoplankton* -
            Sampling
            Date

            08/18/77
            09/30/75
        2.  Chlorophyll a^ -

            Sampl i ng
            Date

            04/30/75
            08/18/75
            09/30/75
Domi nant
Genera

1.  Cryptomonas sp.
2.  Apham'zomenon sp.

            Total

1.  Chroomonas (?) sp.
2.  Cryptomonas sp.

            Total
Station
Number

   1
   2
   3
   4
   5
   6
   7

   1
   2
   3
   4
   5
   6
   7

   1
   2
   3
   4
   5
   6
   7
Algal Units
per ml

    253
     63

    316

    605
    287

    892
Chlorophyll
(yg/1)

    0.6
    0.7
    0.5
    0.5
    9.0
    1.5
    1.4
    1.9
    1.6
    1.7
    1.4
    1.5

    1.6
    1.5
    2.2
    1.5
    1.5
    5.9
    4.7
* The April phytoplankton sample was  lost in  shipment.

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                                 8
C.   Limiting Nutrient Study:
        The algal  assay results are not considered representative  of
    conditions in the reservoir at the times the samples  were  col-
    lected (04/30/75 and 09/30/75) due to significant changes  in
    nutrient concentrations in the samples during shipment from the
    field to the laboratory.
        The reservoir data indicate a combination of limiting  nutrients.
    Following is a tabulation of the mean inorganic nitrogen/ortho-
    phosphorus ratios at each of the sampling stations and times
    with the indicated limiting nutrient in parentheses.
    Station         04/30/75          08/18/75           09/30/75
       1
       2
       3
       4
       5
       6
       7
18/1 (P)
11/1 (N)
15/1 (P)
13/1 (N-?)
17/1 (P)
13/1 (N-?)
4/1 (N)
18/1 (P)
8/1 (N)
15/1 (P)
3/1 (N)
8/1 (N)
10/1 (N)
6/1 (N)
9/1 (N)
7/1 (N)
10/1 (N)
5/1 (N)
7/1 (N)

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IV.   NUTRIENT LOADINGS
     (See Appendix E for data)
     For the determination of nutrient loadings,  the Colorado National
 Guard collected monthly near-surface grab samples  from each of the
 tributary sites indicated on the map (page v),  except for the months
 of May and July when two or three samples were  collected.   Sampling was
 begun in September, 1974, and  was completed in  August,  1975.
     Through an interagency agreement, stream flow  estimates for the
 year of sampling and a "normalized"  or average year were provided  by
 the Colorado District Office of the  U.S.  Geological  Survey for the
 tributary sites nearest the reservoir.
     In this report, nutrient loads for sampled  tributaries were
 determined by using a modification of a U.S.  Geological  Survey computer
 program for calculating stream loadings*.   Nutrient loads  shown are
 those measured minus point-source loads,  if any.
     Nutrient loads for unsampled "minor tributaries and  immediate
 drainage" ("ZZ" of U.S.G.S.) were estimated using  the means of the
 nutrient loads, in kg/km2/year,  at stations D-l  and K-l  and multiplying
 the means by the ZZ area in km2.  No nutrient samples were collected
 on  Unnamed Streams G-l  (Gomez  Canyon) and J-l (Burns Canyon),  and
 nutrient loads for these tributaries are  included  in the estimate  of
 minor tributary loadings.
     The operators  of the Bayfield and Ignacio wastewater treatment
 plants provided monthly effluent samples  and  corresponding flow data.
 *  See Working  Paper No. 175.

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                                     10
The operator of Pagosa Springs wastewater treatment plant did not
participate; nutrient loads from this source were estimated at 1.134
kg P and 3.401 kg N/capita/year, and flows were estimated at 0.3785
m3/capita/day.
    A.  Waste Sources:
        1.   Known municipal* -
        Name
        Bayfield
        Ignacio
        Pagosa Springs  1,500
        2.   Known industrial - None
Pop.
Served
390
350
1,500
Treatment
stab, pond
stab, pond
stab, pond
Mean Flow
(m3/d)
488.3
450.6
567.8
Receiving
Water
Los Pinos River
Pine River
San Juan River
* Treatment plant questionnaires;  Anonymous,  1971.

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                                     11

    B.  Annual Total Phosphorus Loading - Average Year:

        1.  Inputs -

                                              kg P/          % of
            Source                            yr             total
            a.  Tributaries (non-point load) -

                San Juan River.               53,690          34.0
                Piedra River                  57,015          36.1
                Sambrito Creek                   265           0.2
                Unnamed Stream D-l               375           0.2
                Los Pinos River                9,055           5.7
                Unnamed Stream F-l               575           0.4
                Unnamed Stream H-l                20          <0.1
                Spring Creek                   2,170           1.4

            b.  Minor tributaries & immediate
                 drainage (non-point load) -  31,300          19.8

            c.  Known municipal STP's -

                Bayfield                         330           0.2
                Ignacio                          480           0.3
                Pagosa Springs                 1,700           1.1

            d.  Septic tanks* -                   10          <0.1

            e.  Known industrial - None

            f.  Direct precipitation** -       1,105           0.7

                        Total                 158,090         100.0

        2.  Outputs -

            Reservoir outlet - San Juan
                                River         27,970

        3.  Net annual P accumulation - 130,120 kg.
* Estimate based on 34 shoreline dwellings; see Working Paper No.  175.
** See Working Paper No.  175.

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                                    12

        Annual Total Nitrogen Loading - Average Year:

        1.  Inputs -

                                              kg N/          % of
            Source                            yr             total
            a.  Tributaries  (non-point load) -

                San Juan River                645,120         36.3
                Piedra River                  478,760         26.9
                Sambrito Creek                  3,050          0.2
                Unnamed Stream D-l              5,655          0.3
                Los Pinos River               167,355          9.4
                Unnamed Stream F-l              2,130          0.1
                Unnamed Stream H-l              1,215          0.1
                Spring Creek                   17,355          1.0

            b.  Minor tributaries & immediate
                 drainage (non-point load) -  380,500         21.4

            c.  Known municipal STP's -

                Bayfield                          840         <0.1
                Ignacio                         1,265          0.1
                Pagosa Springs                  5,100          0.3

            d.  Septic tanks* -                   360         <0.1

            e.  Known industrial - None

            f.  Direct precipitation** -       68.285          3.8

                        Total              1,776,990         100.0

        2.  Outputs -

            Reservoir outlet - San Juan
                                River      1,403,140

        3.  Net annual N accumulation - 373,850 kg.
* Estimate based on 34 shoreline dwellings; see Working Paper No. 175.
** See Working Paper No. 175.

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                                13

D.   Non-point Nutrient Export by Subdrainage Area:

    Tributary                             kg P/km2/yr    kg N/km2/yr

    San Juan River                            17             203
    Piedra River                              35             294
    Sambrito Creek                             6              65
    Unnamed Stream D-l                        18             273
    Los Pinos River                            7             127
    Unnamed Stream F-l                        31             115
    Unnamed Stream H-l                         1              70
    Spring Creek                              14             116

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                                14
IE.   Yearly Loads:
        In the following table,  the existing phosphorus  loadings
    are compared to those proposed by Vollenweider (Vollenweider
    and Dillon, 1974).   Essentially, his "dangerous"  loading is
    one at which the receiving water would become eutrophic  or
    remain eutrophic;  his "permissible" loading is that  which
    would result in the receiving water remaining oligotrophic
    or becoming oligotrophic if morphometry permitted.   A meso-
    trophic loading would be considered one between "dangerous"
    and "permissible".
        Note that Vollenweider's model  may not be applicable to
    water bodies with short hydraulic retention times.
                              Total Phosphorus       Total  Nitrogen
    	Total   Accumulated    Total    Accumulated
    grams/mVyr             2.50      2.06         28.1       5.9
    Vollenweider phosphorus loadings
     (g/m2/yr) based on mean depth and mean
     hydraulic retention time of Navajo Reservoir:
        "Dangerous"  (eutrophic loading)                0.96
        "Permissible"  (oligotrophic loading)            0.48

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                                    15

V.   LITERATURE REVIEWED

    Anderson, R.  Dennis, 1974.   Personal communication (waterbody
        information and morphometry).   CO Dept.  of Health, Denver.

    Anonymous, 1971.   Inventory of municipal  waste facilities.  EPA
        Publ. OWP-1,  vol.  8, Wash., DC.

    Anonymous, 1975.   Water resources  data for Colorado.   Part 1:
        Surface water records.   U.S. Geol. Surv., Lakewood.

    Vollenweider,  R.  A., and P. J. Dillon, 1974.   The application of
        the phosphorus loading concept to eutrophication research.
        Natl. Res.  Council  of Canada Publ. No.  13690, Canada Centre
        for Inland  Waters,  Burlington, Ontario.

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                                 16
VI.  APPENDICES
                                  APPENDIX A
                                 LAKE RANKINGS

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j.'TA T0 BF JS^O

      N4M£
LAKE
COOE
0801
OwO?  BA^ LAKE
oiOj  BLUE MESA ^E
080<*  CHERRY CREEK LAKE
0805  C'JCHARftS
OBOfc  DILLON
0807  GKANO LAKE
0808  GREEN MOUNTAIN RESERVOIR
0809  HOLBSOOK LAKE
0810  LAKE MEREDITH
0811  MILTON RESERVOIR
0812  NAYAJO RESERVOIK
0313  SHADOW MOUNTAIN LAKE
MEDIAN
TOTAL P
0.023
0.930
0.019
0.054
0.263
0.009
0.013
0.010
0.329
0.397
0.846
0.036
0.020
MEDIAN
INQSG N
0.045
1.09C
0,0*0
0.040
0.040
0.040
0.040
0.040
0.070
0.110
2.280
0.050
0.040
SCO-
MEAN 5tC
419.000
"51.333
395.750
469.333
490.000
181.750
366.500
391.167
490.333
489.667
429.333
479.400
427.000
MEAN
C^LOPA
5.333
2^.767
6.817
23.322
27.400
3.150
4.900
5.833
111.933
164.678
5.900
2.180
5.700
15-
MlN 00
9.4CO
10.200
13.800
10.000
14.800
9.200
10.200
9.100
9.000
10.400
9.200
10.000
9.200
MEDI
DISS OrJTi
0.006
0.730
0.005
0.007
0.015
0.002
0.003
0.002
0.02«
0.098
0.808
0.013
0.003

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            I 4VOIrt

0806  OILLON  RESERVOIR

0807  GRAND LAKE

0808  GREEN MOUNTAIN RESERVOIR

0809  HOLdROOK  LAr,E

0810  LAKE MEREDITH

0811  MILTON  RESERVOIR

0812  NAVAJO  RESERVOIR

0813  SHADOW  MOUNTAIN  LAr<*E
ME.U IAN-
TOTAL P
56 (
0 (
75 (
42 (
33 (
100 (
83 (
92 (
?5 (
17 (
8 (
50 (
67 (
7)
0)
9)
S)
4)
12)
10)
11)
3)
2)
1)
6)
8)
MEDIAN
INORG N
"2 <
e (
87 (
87 (
b8 (
b* <
87 (
58 (
25 (
17 (
0 (
33 (
87 (
5)
1)
91
9)
6>
6)
9)
6)
3)
2)
0)
4)
9)
500-
MEAN SEC
67 (
<-2 (
75 i
33 (
8 (
100 (
92 (
83 (
0 (
17 (
50 (
25 (
58 <
8)
5)
vi
4)
1)
12)
11)
10)
0)
2)
6)
3)
7)
MEAN
CrtLORA
75 1
i? (
"C (
33 (
25 (
92 (
83 (
58 (
3 (
0 (
50 (
100 (
67 <
9)
2)
5 )
4)
3)
11)
10)
7)
1)
0)
6)
12)
8)
15-
MI\ 00
58 (
29 (
8 i
46 (
0 (
75 (
29 (
92 (
100 (
17 (
75 (
46 (
75 (
7i
3)
t I
A '
5)
0)
8)
3)
ID
12)
2)
8)
5)
8)
MEDIAN
DISS CKTriO °
58 (
5 !
i. 7 t
w • '
50 (
33 (
96 (
79 (
96 (
25 (
17 (
0 (
42 (
79 (
7)
11
6)
6>
4)
11)
9)
11)
3)
2)
0)
5)
9)
IN'Jt*
NO
3SS
104
35-
291
157
521
45J
479
183
85
143
296
433

-------
LA
-------
    APPENDIX B





CONVERSION FACTORS

-------
                CONVERSION FACTORS

Hectares x 2.471 * acres
Kilometers x 0,6214 • miles
Miters x 3,281 « feet
                         •A
Cubic meters x 8,107 x 10   • cere/feet
Square kilometers x 0,3861 B square miles
Cubic meters/sec x 35,315'* cubic feet/sec
Centimeters x 0,3937 • Inches
  4
Kilograms x 2,205 * pounds
Kilograms/square kilometer x 5,711 » Ibs/square mile

-------
    APPENDIX C
TRIBUTARY FLOW DATA

-------
                                   TRIBUTARY FLO* INFORMATION FO* COLORADO
                                                                       09/24/76
LA
-------
                                   TRIBUTARY FLO*  INFORMATION FOR COLORADO
                                                                                           09/24/76
LAKE CODE 0812
NAVAJO RESERVOIR
          MONTHLY FLO«S AND OAILY FLO*SICMS>
TRIBUTARY
                            MEAN FLO*  DAY
                                FLOW  DAY
                                                                     FLO*  DAH
                                                                    FLO*
0812C1
031201
0812E1
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
74
7<»
74
74
75
75
75
75
75
75
75
75
74
74
7<*
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
1.359
2.407
2.803
1.331
4.332
3.625
5.239
30.865
61. 164
59.749
31.999
4.446
0.037
0.031
0.009
0.001
0.007
0.012
0.027
0.085
0.085
0.139
0.793
0.093
0.002
0.006
0.001
0.0
0.000
O.OC1
0.005
0.011
O.OC6
0.008
0.173
0.023
3.710
3.483
2.2C9
1.444
5.069
4.332
10. 166
19.709
20.756
42.475
28.543
6.2C1
28
28
21
23
23
27
28

5
11
7
28
26
28
21
23

27
28

5
11
7
28
28
28
21


27
28

5
11
7
28
28
28
21
23

27
28

5
11
7
28
1.671
3.909
2.265
1.331
6.909
2.152
5.182

66.545 21
46.440
54.368 23
2.832
0.045
0.051
0.008
0.001

0.037
0.026

0.093 21
0.108
1.359 23
0.059
0.003
0.010
0.001


O.OCl
0.481

0.006 21
0.006
0.283 23
0.014
3.9C3
7.646
1.926
1.529

3.341
15.546

32.281 21
26.193
42.192 23
6.541








70.226

14.158 31









0.096

0.340 31









0.007

0.076 31









20.048

19.114 31

                                                                                       6.269
                                                                                       0.204
                                                                                       0.045
                                                                                      8.014

-------
                                    TRIBUTARY  FLO<* INFORMATION FOK COLORADO
LAKE CODE 031?
                   MAVAJO  RESERVOIK
0612F1
OS12G1
Oal2dl
 0812J1
          ••'ONTriLY FLOaS  AND  DAILY  FLO»SlCMS)
                             MEAN  FLO*)  DAY
ONT-i
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
YtA4
74
7n
74
74
75
75
75
75
75
75
75
75
7*
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
0.01C
0.019
0.007
O.OC1
O.OC4
0.010
0.023
O.OB5
0.110
C.I 25
0.510
0.005
0.006
0.011
0.004
0.000
0.002
0.005
0.014
0.045
0.051
0.059
0.340
0.028
0.012
0.016
0.006
0.001
0.004
0.007
0.020
0.062
0.074
0.076
0.425
0.045
0.018
0.02S
0.014
C.003
0.018
0.019
0.051
0.178
0.224
0.275
0.623
0.065
28
28
21
23


28

5

7
26












28
28
21
23

27
28

5
11
7
26












 fLO«  DAY

0.0
0.031
0.0
0.0
                                                                      FLU*  DAY
                                                                                         FLOW
                                                   0.028

                                                   0.119

                                                   0.0
                                                   0.0
0.0
0.026
0.0
0.0

0.0
0.019
        21
        31
0.127

0.0
                                                            21
0.079
0.059
0.708   23
0.028
0.085

0.187   31
                                                                                        0.110

-------
                                             FLO* INFORMATION FOR COLORADO
     CODE 0612

     MEAN MONTHLY FLOnS AND UAlLY

TRIBUTARY   MQNT1   fEAR    MEAN FLO*  DAY
0812ZZ
q
10
11
1?
1
?
3
u
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
74
7<.
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
1.133
J.566
0.170
0.113
1.388
2.719
2.180
0.736
1.27<*
1.841
1.926
1.954
1.756
3.087
2.407
0.934
3.087
3.087
4.474
11.978
50.404
45.590
33.980
5.239
28
28
21
23

27
28

5
11
7
28












                                                   KLOW  DAY

                                                  0.680
                                                  0.3^0
                                                  0.144
                                                  0.099

                                                  2.577
                                                  0.425
                                                                     FLOW  DAY
                   FLOW
                                                          21
                                                  0.963
                                                  1.982
                                                  1.784   23
                                                  2.180
1.501

1.869
                                                                            31
                                                                                      1.642

-------
        APPENDIX D





PHYSICAL and CHEMICAL DATA

-------
STORET RETRIEVAL DATE 76/09/24
                                                                  081201
                                                                 36  47  59.0  107  36  18.0
                                                                 NAVAJO RESERVOIR
                                                                 35045    COLORADO
                                                                 11EPALES   760114      2111302
                                                                  0999  FEET   DEPTH   CLASS 00

DATE
FROM
TO
75/04/30






75/08/18




75/09/30








TIME
OF
DAY
10 50
10 50
10 50
10 50
10 50
10 50
10 50
17 15
17 15
17 15
17 15
17 15
17 10
17 10
17 10
17 10
17 10
17 10
17 10
17 10

DEPTH

FEET
0000
0005
0015
0035
0065
0115
0165
0000
0005
0030
0050
0071
0000
0005
0018
0045
0090
0140
0180
0210
00010
WATER
TEMP
CENT
6.1
6.0
5.8
5.8
5.7
4.9
4.3
20.7
20.8
17.5
13.2
10.7
18.4
18.4
18.4
18.1
14.3
12.4
11.1
9.7
00300
DO

MG/L
9.4
9.2
9.2
9.2
9.2
9.4
8.8
6.8
6.6
5.2
5.8
6.6
7.0
6.4
6.8
5.4
6.4
7.2
7.0
6.8
00077
TRANSP
SECCHI
INCHES
30






180




120







00094
CNDUCTVY
FIELD
MICROMHO
191
181
182
183
183
180
182
209
207
176
208
205
164
166
161
157
149
169
172
180
00400
PH

SU
8.10
8.10
8.10
8.00
8.00
8.00
8.05
8.65
8.50
8.10
7.90
7.90
8.15
8.10
8.05
7.90
7.85
7.80
7.80
7.80
00410
T ALK
CAC03
MG/L
92
91
91
91
91
91
88
74
72
70
78
79
70
69
70
70
71
81
88
91
00610
NH3-N
TOTAL
MG/L
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.300
0.300
0.200
0.200K
0.200K
0.200K
0.300
0.200K
0.200K
0.200K
0.200K
0.200
0.400
0.400
0.400
0.400
0.400
0.400
0.400
0.400
00630
N02&N03
N-TOTAL
MG/L
0.130
0.120
0.120
0.120
0.120
0.120
0.130
0.020K
0.020K
0.020
0.060
0.110
0.020K
0.020K
0.020K
0.100
0.120
0.150
0.160
0.180
00671
PHOS-OIS
ORTHO
MG/L P
0.011
0.009
0.009
0.008
0.009
0.008
0.009
0.003
0.004
0.002
0.002K
0.013
0.005
0.004
0.003
0.007
0.017
0.019
0.021
0.017
          K VALUE KNOWN TO 8E
          LESS THAN INDICATED

-------
STO*ET RETRIEVAL OATE 76/09/24
                                                                  081201
                                                                 36 47 59.0 107 36 18.0 3
                                                                 NAVAJO RESERVOIR
                                                                 35045   COLORADO
                                                                 11EPALES  7601K     2111202
                                                                  0999 rrcr  OEPTr  CLASS 00
OATE
FROM
TO
75/04/30






75/08/18




75/09/30







00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCOT LT
OF A REMNING
OAY FEET
10
10
10
10
10
10
10
17
17
17
17
17
17
17
17
17
17
17
17
17
50
50
50
50
50
50
50
15
15
15
15
15
10
10
10
10
10
10
10
10
0000
0005
0015
0035
0065
0115
0165
0000
0005
0030
0050
0071
0000
0005
0018
0045
0090
0140
0180
0210
MG/L P
0,
0,
0
0,
0,
0,
0,
0,
0.
0.
0,
0,
0,
0,
0.
0,
0,
0,
O,
0,
.027
.027
.027
.025
.025
.023
.02^
.022
.024
.020
.021
.019
.013
.012
.010
.018
.028
.030
.028
.027
UG/L PERCENT
0.6






1.5




1.6








-------
    ET RETRIEVAL DATE  7&/09/24
                                                                  081202
                                                                 37  00  07.0  107  24 44.0 3
                                                                 NAVAJO RESERVOIR
                                                                 08007    COLORADO
                                                                 11EP4LES   760114     2111202
                                                                  0056  FEET   DEPTH  CLASS 00

DATE
FROM
TO
75/04/30




75/08/18





75/09/30





TIME
OF
DAY
14 30
14 30
14 30
14 30
14 30
12 50
12 50
12 50
12 50
12 50
12 50
16 00
16 00
16 00
16 CO
16 00

DEPTH

FEET
0000
0005
0015
0035
0052
0000
0005
0015
0030
0050
0067
0000
0005
0015
0045
0075
00010
WATER
TEMP
CENT
8.5
8.3
7.6
7.6
7.4
18.3
18.3
17.8
17.2
12.6
10.2
18.4
18.4
17.9
17.8
15.4
00300
DO

MG/L
9.0
6.0
9.2
9.2
8.2
6.4
7.0
6.6
5.6
5.0
5.6
7.6
6.8
7.0
6.2
5.2
00077
TRANSP
StCCHl
INCHES
10




48





24




00094
CNDUCTVY
FIELD
MICROMHO
209
202
196
195
208
162
166
164
166
123
100
161
15S
153
156
105
00400
PH

su
8.15
8.20
8.10
8.10
8.10
7.90
7.95
7.90
7.70
7.60
7.80
8.10
8.10
8.10
7.95
7.80
00410
T ALK
CAC03
MG/L
89
87
87
86
84
71
71
68
69
63
69
71
69
69
61
53
00610
NH3-N
TOTAL
M6/L
0.050
0.040
0.040
0.040
0.040
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.500
0.400
0.400
0.400
0.400
0.500
0.400
0.400
0.400
0.500
0.500
0.200K
0.200
0.200
0.200K
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.120
0.120
0.120
0.120
0.130
0.020K
0.020K
0.020K
0.030
0.080
0.020
0.020K
0.020K
0.020K
0.090
0.110
00671
PHOS-DIS
ORTnO
MG/L P
0.014
0.014
0.014
0.016
0.017
0.008
0.007
0.007
0.013
0.040
0.006
0.009
0.005
0.005
0.018
0.023
  DATE
  FROM
   TO

75/04/30
75/08/18
75/09/30

TIME DEPTH
OF
DAY FEET
14 30 0000
14 30 0005
14 30 0015
14 30 0035
14 30 0052
12 50 0000
12 50 0005
12 50 0015
12 50 0030
12 50 0050
12 50 0067
16 00 0000
16 00 0005
16 00 0015
16 00 0045
16 00 0075
00665
PHOS-TOT

MG/L P
0.064
C.066
0.064
0.067
0.057
0.020
0.020
0.019
0.026
0.043
C.042
0.020
0.022
0.018
0.039
0.040
32217 00031
CHLRPriYL INCDT LT
A REMNING
UG>L PERCENT
0.7




1.4





1.5




           K VALUE KNOWN TO-BE

-------
STURET RETRIEVAL DATF 76/09/24
                                                                  081303
                                                                 36 50 53.0 107 36 14.0 3
                                                                 NAVAJO RESERVOIR
                                                                 35045   COLORADO
                                                                 11EPALES  760114     2111202
                                                                  5999 f£py  n£pT«  CLASS OQ
DATE
TO
75/04/30






75/08/15






75/09/30







00010
TIME DEPTH WATER
OF TEMP
DAY FEET
11
1
1
1
1
1
1
15
15
15
15
15
15
15
14
14
14
14
14
14
14
14
40
40
40
40
40
40
40
45
45
45
45
45
45
45
25
25
25
?5
25
25
25
25
0000
0005
0015
0035
0085
0125
0165
0000
0005
0027
0060
0100
0150
0180
0000
0005
0015
0040
0080
0120
0160
0210
CENT
7.2
6.5
6.3
5.5
5.1
4.9
4.7
20.8
20.6
18.8
11.6
8.4
6.4
5.7
19.0
18.8
18.6
18.3
14.9
13.2
12.2
9.7
00300
00

MG/L
9.0
9.0
8.8
9.2
9.2
9.0
9.4

7.0
5.6
6.0
6.8
7.0
7.2
7.0
7.0
6.2
5.6
6.0
6.4
6.4
4.8
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMriO
9 175
169
172
180
185
187
185
180 208
205
190
175
191
208
205
72 177
173
171
168
153
171
179
183
00400
PH

SU
8.10
8.15
8.15
8.10
8.10
8.10
8.10
8.30
8.35
8.10
7.90
7.75
7.65
7.65
8.10
8.10
8.00
7.80
7.80
7.80
7.70
7.60
00410
T ALK
CAC03
MG/L
87
89
88
92
93
94
93
68
68
72
69
80
90
91
87
87
89
82
87
92
99
107
00610
NH3-N
TOTAL
MG/L
0.030
0.030
0.020
0.020K
0.020K
0.020
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.300
0.200
0.200
0.200
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.150
0.150
0.140
0.120
0.120
0.120
0.120
0.020K
0.020K
0.020K
0.070
0.130
0.560
0.160
0.020K
0.020K
0.020K
0.060
0.120
0.140
0.180
0.220
00671
PHOS-OIS
OftTHO
MG/L P
0.015
0.012
0.010
0.009
0.008
0.009
0.009
0.003
0.003
0.003
0.010
0.015
0.014
0.013
0.003
0.003
0.006
0.016
0.019
0.018
0.017
0.013
           K  VALUE KNOWN TO BE
           LESS  THAN  INDICATED

-------
       RETRIEVAL DATE 76/09/2'.
                                                                  081203
                                                                 36 50 53.0 107 36 14.0 3
                                                                 NAVAJO RESERVOIR
                                                                 35045   COLORADO
                                                                 11EPALES  760114     2111202
                                                                  0999 FEET  DEPTH  CLASS 00
  DATE
  FROM
   TO

75/04/30
75/08/15
75/09/30
00665 32217 00031
TIME DEPTH PHOS-TOT CHLPPHYL INCOT LT
OF A REMNING
DAY FEET MG/L P
11 40
11 40
11 40
11 40
11 40
11 40
11 40
15 45
15 45
15 45
15 45
15 45
15 45
15 45
14 ?5
14 25
14 ?5
14 25
14 25
14 25
14 25
14 25
0000
0005
0015
0035
0085
0125
0165
0000
0005
0027
0060
0100
0150
0180
0000
0005
0015
0040
0080
0120
0160
0210
0.056
0.053
0.042
0.022
0.019
C.021
0.021
o.oia
0.020
0.028
0.029
0.035
0.030
0.034
0.016
0.013
0.016
0.022
0.024
0.027
0.026
0.029
JG/L PERCENT
0.5






1.9






2.2








-------
STDRET RETRIEVAL DATE 76/09/24
                                                                  081204
                                                                 36 54 47.0 107 26 48.0
                                                                 NAVAJO RESERVOIR
                                                                 35045   COLORADO
                                                                 11EPALES  760114     2111202
                                                                  0150 FEET  D£pTh  CLASS 00

DATE
FROM
TO
75/04/30






75/08/18







75/09/30







TIME
OF
OAf
15 10
15 10
15 10
15 10
15 10
15 10
15 10
13 20
13 20
13 20
13 20
13 20
13 20
13 20
13 20
16 15
16 15
16 15
16 15
16 15
16 15
16 15

DEPTH

FEET
0000
0005
0015
0030
0065
0115
0145
0000
0005
0020
0045
0080
0110
0140
0175
0000
0005
0015
0050
0090
0120
0155
00010
WATER
TEMP
CENT
7.1
7.1
6.9
6.6
6.5
6.6
6.5
20.7
19.9
18.9
12.3
9.3
7.3
6.6
5.5
18.3
18.3
18.2
18.0
14.0
12.7
11.9
00300
DO

MG/L
9.2
9.0
9.0
9.2
9.4
9.2
9.4
6.8
6.8
6.4
5.6
6.6
6.6
5.8
5.4
B.4
6.8
6.8
6.2
5.8
5.4
5.0
00077 00094
TRflNSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
14 289
286
280
280
307
297
270
84 185
118
163
143
96
123
161
212
36 158
155
154
152
94
170
141
00400
PH

SU
8.20
8.20
8.20
8.20
8.20
8.20
8.20
8.20
8.10
7.80
7.50
7.45
7.50
7.60
7.60
8.00
8.00
8.00
7.80
7.75
7.70
7.70
00410 .
T ALK
CAC03
MG/L
87
89
88
88
88
86
76
59
61
59
60
49
63
74
88
70
71
70
54
61
72
74
00610
NH3-N
TOTAL
MG/L
0.030
0.030
0.030
0.030
0.030
0.040
0.050
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.400
0.300
0.300
0.200
0.200
0.400
0.500
0.200
0.200
0.200
0.200
0.200K
0.300
0.300
0.300
0.200
0.200
0.200
0.200K
0.200
0.200
0.200
00630
N02&N03
N-TOTAL
MG/L
0.110
0.100
0.110
0.110
0.110
0.130
0.160
0.020K
0.020K
0.020K
0.080
0.080
0.130
0.170
0.200
0.020K
0.020K
0.020K
0.100
0.140
0.170
0.170
00671
PHOS-OIS
ORTHO
MG/L P
0.010
0.010
0.009
0.010
0.010
0.015
0.020
0.003
0.002
0.005
0.012
0.019
0.020
0.022
0.024
0.005
0.004
0.004
0.023
0.023
0.024
0.025
           K  VALUE KNOWN TO BE
           LESS THAN  INDICATED

-------
STDRET RETRIEVAL DATE 76/09/24
                                                                  08120*
                                                                 36 54 47.0 107 26 48.0 3
                                                                 NAVAJO RESERVOIR
                                                                 350-»5   COLORADO
                                                                 11EPALES  760114     2111202
                                                                  0150 FEET  DEPTH  CLASS 00
DATE
FROM
TO
75/04/30






75/08/18







75/09/30






00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
15
15
15
15
15
15
15
13
13
13
13
13
13
13
13
16
16
16
16
16
16
16
10
10
10
10
10
10
10
20
20
20
20
20
20
20
20
15
15
15
15
15
15
15
0000
0005
0015
0030
0065
0115
0145
0000
0005
0020
0045
0080
0110
0140
0175
0000
0005
0015
0050
0090
0120
0155
MG/L P
0
0
0
0
0
Q
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.035
.030
.033
.037
.035
.065
.144
.013
.012
.013
.018
.030
.041
.051
.084
.020
.015
.015
.034
.040
.043
.041
UG/L PERCENT
0.5






1.6







1.5







-------
RETRIEVAL DATE 76/09/?4
                                                           081205
                                                          36 51 20.0  107 33 28.0 3
                                                          NAVAJO RESERVOIR
                                                          35039   COLORADO
                                                          11EPALES  760114
         2111202
                                                           0999
DEPTH  CLASS CC
DATE
FROM
TO
75/04/30






75/08/18







75/09/30





00010
TIME DEPTH WATER
OF TEMP
DAY FEET
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
05
05
05
05
05
CS
05
30
30
30
30
30
30
30
30
45
45
45
45
45
45
0000
0005
0015
0030
0065
0115
0165
0000
0005
0025
0050
0090
0140
0190
0220
0000
0005
0015
0045
0080
0116
CENT
6.7
6.7
6.4
6.1
6.1
5.8
5.3
20.6
21.1
19.7
13.0
9.2
6.9
5.3
4.2
18.7
18.7
18.7
17.9
14.9
13.2
00300
DO
MG/L
9.2
9.2
9.0
9.2
9.0
9.2
9.0
6.8
6.8
5.2
5.8
6.6
6.6
6.6
7.4
7.4
6.6
6.8
5.6
6.0
6.6
00300
DO

MG/L
9.2
9.2
9.0
9.2
9.0
9.2
9.0
6.8
6.8
5.2
5.8
6.6
6.6
6.6
7.4
7.4
6.6
6.8
5.6
6.0
6.6
C0077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MIC*OMHO
34 193
192
189
187
189
196
196
132 207
192
180
151
118
181
201
210
60 160
160
163
152
122
108
00400
PH

SU
8.20
8.20
6.20
7.70
7.80
3.00
8.10
8.00
8.30
8.00
7.90
7.75
7.70
7.70
7.70
7.90
7.95
7.95
7.80
7.70
7.70
00410
T ALK
CAC03
MG/L
89
90
89
88
86
86
88
67
70
66
63
54
77
87
93
71
74
75
73
63
63
00610
NH3-N
TOTAL
MG/L
0.020
0.020
0.020K
0.020K
0.064
0.030
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.400
0.400
o.soa
0.300
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200
0.300
0.300
0.400
0.300
0.300
00630
N02&N03
N-TOTAL
MG/L
0.140
0.110
0.110
0.110
0.140
0.140
0.130
0.020K
0.230
0.060
0.090
0.100
0.160
0.180
0.190
0.020
0.020
0.210
0.060
0.100
0.110
00671
PrtOS-OIS
ORTHO
MG/L P
0.008
0.007
0.008
0.007
0.012
0.012
0.011
0.002
0.002K
0.002
0.005
0.019
0.019
0.017
0.017
0.005
0.004
0.004
0.011
0.020
0.018
     K VALUE KNOtfN TO BE
     LESS THAN INDICATED

-------
STDRET RETRIEVAL DATE 76/09/24
                                                                  081205
                                                                 36 51 20.0 107 33 28.0 3
                                                                 NAVAJO RESERVOIR
                                                                 3503v   COLORADO
  DATE
  FROM
   TO

75/04/30
75/08/13
75/09/30
                                                                 11EPALES  760114     2111202
                                                                  0999 FEET  DEPTH  CLASS 00

TIME DEPTH
OF"
DAY FEET
16 05 0000
16 05 0005
16 05 0015
16 05 0030
16 05 0065
16 05 0115
16 05 0165
16 30 0000
16 30 0005
16 30 0025
16 30 0050
16 30 0090
16 30 0140
16 30 0190
16 30 0220
16 45 0000
16 45 0005
16 45 0015
16 45 0045
16 45 0080
16 45 0116
00665
PHOS-TOT

MG/L P
0.025
0.025
0.013
C.019
0.021
0.034
0.028
0.025
0.025
0.022
0.027
0.045
0.039
0.040
0.038
0.020
0.013
0.015
0.021
0.028
0.043
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
9.0






1.7







1.5






-------
STOSET RETRIEVAL DATE 76/09/2*
                                                                  081206
                                                                 37 01 28.0 107 22 10.0
                                                                 NAVAJO RE5ESVOIR

                                                                 06007   COLOrtAOO

DATE
FROM
TO
75/08/18



75/09/30




DATE
FROM
TO
75/08/18



75/09/30




TIME DEPTH
OF
DAY FEET
12 20 0000
12 20 0005
12 20 0015
12 20 0032
15 30 0000
15 30 0005
15 30 0015
15 30 0035

TIME DEPTH
OF
DAY FEET
12 ?0 0000
12 20 0005
12 20 0015
12 20 0032
15 30 0000
15 30 0005
15 30 0015
15 30 0035
00010
WATER
TEMP
CENT
18.6
18.2
17.7
16.4
IB. 5
18.5
18.1
17.8
00665
PHOS-TOT

MG/L P
0.040
0.030
0.041
0.070
0.031
0.032
0.027
0.033
00300
DO

MG/L
6.
6.
5.
5.
8.
7.
7.
7.
32217
00077
TRANSP
SECCHI
INCHES
2 9
4
4
2
2 12
6
0
2
00031
00094
CNOUCTVY
FIELD
MICROMHO
197
186
189
227
166
165
162
171

11EPALES 76011
Ou3t FC.ET DEf-
00400 00410
PH

su
7.95
7.90
7.90
7.90
8.10
8.10
8.10
8.10

T ALK
CAC03
MG/L
58
75
76
84
75
70
71
76

K 2111202
:TH CLASS 00
00610 00625
NH3-N TOT KJEL
TOTAL
M&/L
0.020K
0.020K
0.020
0.020K
0.020K
0.020
0.030
0.030

N
MG/L
0.200
0.200K
0.200
0.500
0.200
0.200
0.200
0.200K

00630
N02&N03
N-TOTAL
MG/L
0.030
0.030
0.030
0.040
0.020
0.020K
0.020K
0.020K

00671
PHOS-OIS
ORTHO
MG/L P
0.014
0.021
0.017
0.013
0.013
0.010
0.008
0.010

CHLRPHYL INCDT LT
A
UG/L
1.



5.



REMNING
PERCENT
4



9









































































          K  VALUE KNOWN TO BE
          LESS  THAN  INDICATED

-------
iTORET RETRIEVAL DATE 76/09/24
                                                                 081207
                                                                36 55 57.0  107  36 09.0  3
                                                                NAVAJO RESERVOIR
                                                                35045   COLORADO
                                                                 11EPALES   760114      2111202
                                                                 0070 FEET  DEPTH   CLASS  00
DATE
FROM
TO
75/06/15




75/09/30






DATE
FROM
TO
75/08/15




75/09/30





TIME DEPTH
OF
DAY FEET
16 15 0000
16 15 0005
16 15 0020
16 15 0045
16 15 0065
15 00 0000
15 00 0005
15 00 0015
15 00 0040
15 00 0070
15 00 0105

TIME DEPTH
OF
DAY FEET
16 15 0000
16 15 0005
16 15 0020
16 15 0045
16 15 0065
15 00 0000
15 00 0005
15 00 0015
15 00 0040
15 00 0070
15 00 0105
00010
WATER
TEM*>
CENT
19.5
19.7
18.9
12.4
10.4
19.0
18.8
18.5
18.4
15.4
13.6
00665
PHOS-TOT

MG/L P
0.032
0.028
0.026
0.053
0.056
0.022
0.024
0.016
0.018
0.028
0.024
00300
DO

MG/L
6.
6.
6.
3.
4.
8.
7.
6.
6.
5.
6.
32217
00077
TRANSP
SECCHl
INCHES
4 96
4
4
8
2
6 60
0
8
6
4
0
00031
00094
CNOUCTVY
FIELD
MICROMHO
206
202
199
142
123
168
177
175
173
125
158

00400
PH

su
7.80
7.90
8.10
8.10
8.00
8.10
8.10
8.10
8.05
7.85
8.00

00410
T ALK
CAC03
MG/L
75
75
76
70
61
87
81
83
87
68
80

00610 00625 00630
NH3-N TOT KJEL N02&N03
TOTAL
MG/L
0.020K
0.020K
0.020K
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K

N N-TOTAL
MG/L
0.200
0.200
0.200K
0.200K
0.200K
0.200K
0.200
0.200K
0.200K
0.200K
0.200

MG/L
0.020K
0.020K
0.020K
0.060
0.090
0.020K
0.020K
0.020K
0.020K
0.090
0.130

00671
PhOS-uIS
ORTMO
MG/L P
0.003
0.004
0.005
0.018
0.015
0.005
0.007
0.005
0.007
0.017
0.020

CHLRPHYL INCOT LT
A
UG/L
1.




4.





REMNING
PERCENT
5




7
































































































           K  VALUE KNOWN TO BE
           LESS  THAN  INDICATED

-------
       APPENDIX E

TRIBUTARY AND WASTEWATER
  TREATMENT PLANT DATA

-------
ST03ET KETRIEVAL OATt 76/09/24
                                                                 36 40 50.0 107 40 22.0  <»
                                                                 SAN JUAN
                                                                 06      la NAVAJO DAM
                                                                 0/MAVAJO RESERVOIR        110291
                                                                 ST RT 173 8«DG 6 MI « OF  NAVAJO  DAM
                                                                 11EPALES             '2111204
                                                                  0000 FEET  DEPTH  CLASS  CO
DATE
FROM
TO
74/09/23
74/11/21
74/12/23
75/01/21
75/02/27
75/03/23
75/05/05
75/05/21
75/06/14
75/07/09
75/07/23
75/07/31
75/08/28
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
10
10
14
11
10
09
11
10
11
09
10
09
10
40
30
55
00
00
00
?5
15
05
20
00
30
30
MG/L
0
0
0
0
0
0
c
0
0
0
0
0
0
.112
.100
.104
.114
.032
.040
.035
.075
.040
.075
.115
.135
.085
MG/L
1.
0.
0.
0.
0.
0.
1.
0.
1.
0.
0.
6.
1.
100
900
400
600
400
400
200
950
500
300
300
500
350
00610 00671 00665
NH3-N PnOS-DIS PHOS-TOT
TOTAL URTMO
MG/L
0.
0.
0.
0.
0.
0.
C.
0.
0.
0.
0.
0.
0.
020
030
015
024
024
010
025
020
025
025
015
090
015
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0
0
.005
.015
.010
.010
.008K
.005K
.005K
.005
.005
.005
.015
.025
.010
MG/L P
0.010
0.015
0.020
0.020
0.010K
0.020
0.020
0.030
0.020
0.017
0.020
0.030
0.010
    K VALUE KNOWN TO 8E
    LESS THAN INDICATED

-------
STOPET RETRIEVAL DATE 76/09/24
                                                                   031242
                                                                  37  01  10.0  107  15 20.0  4
                                                                  SAN JUAN
                                                                  os      is  PAGOSA JCT
                                                                  T/^AVAJO rtESESVOI^       110291
                                                                  SEC KO tft^OG 16.5  MI  E OF AK80LES
                                                                  11EPALES              2111204
                                                                   0000 f"£ET   QtPlH  CLASS GO
DATE
FROM
TO
74/09/33
74/1 1/21
74/12/23
75/01/23
75/02/27
75/03/28
75/05/05
75/05/21
75/06/11
75/07/07
75/07/23
75/07/31
75/08/23
C0630 00625
TIME DEPTH NO?kN03 TOT KJEL
OF N-TOTAL N
DAf FEET
It
14
11
13
15
13
13
13
14
13
14
14
13
20
00
30
00
00
00
20
20
40
15
10
00
30
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
.016
.005K
.016
.064
.040
.280
.100
.070
.055
.010
.010
.015
.010
MG/L
0.
i.
0.
0.
0.
i.
i.
i.
2.
X).
0.
1.
2.
250
000
600
800
600
050
000
600
400
250
650
250
600
00610 00671 00665
NH3-N PnOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
010
020
032
040
048
027
020
035
045
075
025
165
015
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
005
015
016
024
032
035
030
025
020
052
020
030
005
MG/L ?
0.027
0.030
0.040
0.040
0.100
0.360
0.130
0.190
0.147
0.052
0.090
0.090
0.030
     K VALUE KNOWN TO BE
     LESS THAN INDICATED

-------
STO»ET RET&IEVSL DATE 76/09/24
                                                                  0812bl
                                                                 37 0". 35.0 107 24 15.0 4
                                                                 03      7.5 ALLISON
                                                                 T/NAVAJO rtESErfVOIK       110291
                                                                 SEC SO 8^00 3.5 MI N OF AP.BOLES
                                                                 11EPALES             211120t
                                                                  0000  FEET  DEPTH  CLASS 00
DATE
FROM
TO
7<«/Q9/28
74/1 1/21
74/12/23
75/01/23
75/02/27
75/03/23
75/05/05
75/05/21
75/06/11
75/07/07
75/07/23
75/07/31
75/08/28
00630 00625
TIME DEPTH M026.N03 TOT KJEL
OF N-TOTAL N
OAY FEET
13
13
12
11
1«»
12
12
12
14
12
13
13
12
SO
30
40
00
00
45
50
30
00
35
45
50
30
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
.003
.033
.006
.112
.072
.140
.540
.065
.035
.015
.015
.010
.005
MG/L
1.
0.
0.
1.
1.
0.
0.
1.
0.
0.
0.
0.
1.
000
700
600
300
100
800
500
300
925
750
500
700
400
00610 00671 00665
NH3-N PhOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
015
020
016
040
024
020
345
100
025
075
020
025
015
MG/L
3.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
005K
005K
OO&K
008
008
015
005
015
020
015
015
025
005K
MG/L P
0.005K
0.010K
0.020
0.010K
0.130
0.160
0.150
0.200
0.130
0.080
0.030
0.050
0.010K
    K VALUE KNOWN TO 8E
    LESS THAN INDICATED

-------
STO-^ET RETRIEVAL DATE
                                                                  0312C1
                                                                 37 00 38.0  107 27 23.0 4
                                                                 iAMBRITO CREE<
                                                                 03      7.5 ALLISON
                                                                 T/NAvAjO RESE^VOItf        110291
                                                                 CLVRT i MI  s AND  .a MI E  OF RT  151  JCT
                                                                 11EPALE5              211120^
  DATE   T!uf DEPTH N02^N03
  FROM    Of
   TO    DAY  TEET
74/09/26
74/11/21
74/12/23
75/02/27
75/03/28
75/05/05
75/05/21
75/06/1 1
75/07/07
75/07/23
75/07/31
75/08/28
13 30
13 00
13 30
13 00
12 00
12 30
12 10
13 45
12 10
12 25
13 12
12 04
0630
'*,N03
OTAL
IG/L
0.052
0.304
0.500
0.366
0.«.80
0.160
0.100
0.005
0.060
0.060
0.070
0.015
00625
TOT KJEL
N
MG/L
1.6CO
0.400
0.700
1.300
0.950
1.700
1.130
2.600
0.850
0.850
1.950
1.650
00610
NH3-N
TOT&L
MG/L
0.120
0.010
0.024
0.056
0.015
0.040
C.C30
0.050
0.075
0.035
C.030
0.040
00671
PHOS-DIS
OUTHO
MG/L P
0.010
0.005K
0.016
0.032
0.015
0.065
0.030
0.025
0.050
0.045
0.055
0.025
00665
PHOS-TOT

MG/L P
0.050
0.010K
0.020
0.120
0.260
0.310
0.170
0.030
0. 140
0.110
0.130
0.050
     K VALUE KNOWN TO BE
     LESS THAN  INDICATED

-------
STOSET RETRIEVAL DATE 76/09/24
  DATE   TIME DEPTH N02S.M03
  FROM    OF
   TO    DAY  FEET
74/09/23
74/11/21
75/02/27
75/03/28
75/C5/05
75/05/21
75/06/H
75/07/07
75/07/23
75/07/31
75/08/28
13
12
12
11
12
12
13
12
12
12
12
00
30
00
00
20
00
30
00
47
30
10
                                                                  031201
                                                                 37 00 37.0 107 28 52.0 4
                                                                 UNNAMtD STREAM
                                                                 06      7.5 ALLISON
                                                                 T/NAvAjO KESErfVQlft        110291
                                                                 SEC SO ri*0(5 l.to MI S OF ALLSION
                                                                 11EPALES             2111204
                                                                  0000 FEET  DEPTH  CLASS  00
0630
'S.M03
OTAL
IG/L
0.016
C.080
0.272
0.050
0.030
0.120
O.OJO
0.0?5
0.020
0.020
0.005
00625
TOT KJEL
N
MG/L
0.900
0.700
2.300
0.650
1.300
2.400
3.400
1.100
1.350
1.700
0.900
00610
NH3-^
TOTAL
MG/L
0.065
0.025
0.248
0.010
0.035
0.040
0.055
0.095
0.040
0.095
0.015
00671
PHOS-DIS
ORTrlO
MG/L P
O.C10
0.005K
0.032
0.005
0.010
0.160

0.040
0.035
0.055
0.025
00665
PHOS-TOT

MG/L P
0.030
0.010K
0.270
0.050
0.050*.
0.480

0.160
0.245
0.230
0.065
   K  VALUE  KNOWN  TO  BE
   LESS  THAN  INDICATED

-------
STD^EIT RETRIEVAL DATE  76/09/24
 0812E1
37 00 35.0 107 35 57.0 4
LOS PINOS KIVEr!
06      15 TIFFANY
         RESERVOIR
    AT GAGE STN
11EPALLS
         110291
.5 M SE OF 5T RT
     2111204
                                                                                                   172 JCT
                                                                   oooo
                                                                                     CLASS oo
DATE
FROM
TO
74/09/28
74/11/21
74/12/23
75/02/27
75/03/28
75/05/05
75/05/21
75/06/11
75/07/07
75/07/23
75/07/31
75/OS/23
00630 00625
THE DEPTH N02*.N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12
11
14
li
10
10
11
11
11
11
10
11
00
30
15
30
15
12
00
50
45
00
45
15
MG/L MG/L
0
0
0
0
c
0
0
0
0
0
0
0
.012
.040
.019 (
. I4
-------
    tT SETPIEVfiL OME 76/09/2'*
                      00630
  OATE   TI"E DE°T-» N02&N03
  FROM    OF        N-TOTAL
   TO    DAY  FEET    MG/L
75/03/24 13 30
75/05/05 14 00
75/05/21 14 05
0.075
0.005
0.020
  00625
TOT KJEL
   N
  MG/L

   1.150
   2.300
   0.450
 00610
NH3-N
TOTAL
 MG/L

  0.010
  0.035
  0.010
                                                                 37 03 00.0  107  11 55.0  4
                                                                 UMNAMEO 5TKEAM
                                                                 08      15  PAGOSA JCT
                                                                 T/NiAvAjO RESERVOI*        1102^.1
                                                                 b£C *
-------
STORET RETRIEVAL DATE  76/09/24
                                                                   0312-11
                                                                  37 03 10.0 107 08 00.0 4
                                                                  UNNAMED STREAM
                                                                  0?      15 PAGOSA JCT
                                                                  T/NAvAJO 3£SEP.vGIr!       110291
                                                                  iEC KO -U'^G 2 Ml N OF JUANITA
                                                                  11EPALES             211120<-
                                                                   0000 FEET  DEPTH  CLASS 00
DATE
FP.OM    OF
 TO    UAY
         TIME DEPTH
              FEET
75/03/28 14 00
75/05/05 13 45
75/05/21 13 50
75/06/11 15 30
75/07/07 14 OC
75/07/23 14 15
75/07/31 14 20
75/08/28 14 20
00630
N02&N03
N-TOTAL
MG/L
0.230
0.005
0.015
0.002
0.005
0.005
O.OOb
0.005
00625
TOT KJEL
N
MG/L
1.450
0.800
0.575
1.200
0.150
1.000
0.850
0.350
00610
NH3-N
TOTAL
M-3/L
0.020
0.015
0.015
0.025
0.020
0.010
0.010
0.005K
00671
PnOS-DIS
UPTHO
MG/L P

0.005K
0.005K
0.010
0.005K
0.005K
0.010
0.005K
00665
PfiOS-TOT

MG/L P
O.UlO
0.010K
0.015

0.010K
0.040
0.010
0.010*
    K VALUE KNOWN TO BE
    LESS THAN INDICATED

-------
STOSET KETPIEVAL DATE 76/09/24
  OATE   TIME OE°TH N02?>N03
  FROM    OF
   TO    DAY  FEET
74/09/23
74/11/21
74/12/23
75/02/27
75/03/28
75/05/05
75/05/21
75/06/11
75/07/07
75/07/23
75/07/31
75/08/28
12
11
14
11
10
10
11
12
11
11
11
11
17
45
00
00
00
25
10
00
00
15
00
25
                                                                  0812M
                                                                 37 CO  40.0  107  35  45.0  4
                                                                 SPRING CREEK
                                                                 0-?       15  TIFFANY
                                                                 T/NAVAjO  ^ESErtvOlK        110291
                                                                 BNK AT OAGE  .'+  MI  t  OF  LA  60CA ON SEC kO
                                                                 11EPALES              2111204
                                                                  0000  FEET   OEPTn  CLASS  00
10630
!»>N03
'OTAL

-------
STORET RETRIEVAL DATE 76/09/24
  DATE   TIME DEPTH N02J.N03
  FROM    OF
   TO    DAY  FEET
74/12/33
75/C1/20
75/03/19
75/03/13
75/04/16
75/05/08
75/05/21
75/05/28
75/06/10
75/06/23
75/07/10
75/07/30
75/06/20
75/09/10
75/09/30
75/10/22
75/10/29
10 00
10 00
11 00
11 00
15 00
11 00
14 00
10 00
13 00
08 00
08 00
08 00
08 00
U7 00
08 00
                                                                   0612E4           PUOS12EA
                                                                  37  06 45.0  107  37 45.0  4
                                                                  IGM4CIO
                                                                  08057   7.5  CARACAS
                                                                  T/NAVAJO RES.
                                                                  LOS P1NOS rtIVt«
                                                                  11EPALES             2141204
                                                                   0000 FFFT   OfPTH  CLASS 00
                                                                                      P001000
0630
'J.N03
OTAL
iG/L
0.080
0.080
0.080
o.oao
0.200
0.050
0.050
0.050
0.050
0.050
0.050
0.050
0.050
0.050
0.025
0.025
0.100
00625
TOT KJEL
N
MG/L
10.000
14.000
9.700
l.OOOK
5.700
5.600
3.200
3.400
6.800
4.800
7.500
17.500
7.400
6.600
6.900
11.000
9.900
00610
NH?-N
TOTAL
MG/L
0.100
0.080K
3.200
0.390
3.195
0.075
0.370
0.050K
C.050
0.175
0.050
0.025K
0.025K
0.100K
0.025K
0.140
0.460
00671
PnOS-OIS
ORTHO
MG/L P
3.700

2.700
2.300
1.450
1.300
2.300
1.900
2.600
2.000
2.800
2.400
2.400
2.600
1.700
2.100
2.400
00665
PHOS-TOT

MG/L P
3.200
4.500
3.500
2.300
1.900
2.300
2.500
2.200
4.300
2.000
3.600
4.300
3.000
3.000
2.100
2.600
2.800
50051
FLO*
RATE
INST MGD
0.080


0.080
0.129











0.130
50053
CONDUIT
FLO*-MGO
MONTHLY
0.060
0.034
0.086
0.080
0.129
0.129
0.130
0.130
0.130
0.130
0.130
0.130
0.135
0.130
0.130
0.130

     K VALUE KNOWN TO BE
     LESS THAN INDICATED

-------
ST3«ET RETRIEVAL 'JATE 76/09/24
  DATE   TIME DEPTrt
  FROM    OF
   TO    DAY  FEET

75/04/21 08 30
75/06/05 08 ?0
75/07/03 09 00
75/08/07 15 00
75/09/33 13 30
75/10/39 08 45
                 P00812EB
37 13 30.0 107 36 00.0 4
                                                                                                pooo39o
                                                                 03      7.5 CHIMNEY KOCK
                                                                 T/NAV4JO f?ES.             110291
                                                                 LOS PINOS KIVER
                                                                 llEPALtiS              214120^
                                                                  0000 FEET  DEPTH  CLASS  00
00630
N02kN03
N-TOTAL
MG/L
0.350
0.300
0.050
0.050
C.125
0.050
00625
TOT KJEL
N
MG/L
5.000
1.700
3.300
5.100
4.300
6.000
00610
NH3-N
TOTAL
MG/L
0. 150
0.300
0.035
0.067
0.220
0.025
00671
PMOS-OIS
ORTHO
MG/L P
1.450
1.650
0.860
0.810
0.790
1.350
00665
PHOS-TOT

MG/L P
2.100
2.100
0.860
0.810
2,900
1.700
50051
FLOW
RATE
INST MGD
0.050
0.113
0.011
0.200
0.200
0.200
50053
CONDUIT
FLO--MGO
MONTHLY
0.050
0.113
0.011
0.200
0.200
0.200

-------