U.S. ENVIRONMENTAL PROTECTION AGENCY
               NATIONAL EUTROPHICATION SURVEY
                        WORKING PAPER SERIES
                                              REPORT
                                               ON
                                         MSTAD RESERVOIR
                                          VAL VERDE COUNTY
                                              TEXAS
                                            EPA REGION VI
                                         WORKING PAPER No, 631
     CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
                                 and
    ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440

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                            REPORT
                              ON
                       WISTAD RESEWOIR
                       VAL VERDE COUNTY
                            TEXAS
                          EPA REGION VI
                      WORKING PAPER No, 631
WITH THE COOPERATION OF THE
    WATER QUALITY BOARD
          AND THE
    TEXAS NATIONAL GUARD
      FEBRUARY/  1977

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                               CONTENTS
                                                           Page
  Foreward                                                   ii
  List of Texas  Study Reservoirs                              iv
  Lake and Drainage Area  Map                                  vi

  Sections
  I.  Conclusions                                             1
 II.  Lake and Drainage Basin Characteristics                  3
III.  Lake Water Quality  Summary                               4
 IV.  Nutrient Loadings                                      11
  V.  Literature Reviewed                                    15
 VI.  Appendices                                             16

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                                  11
                           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)], 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 Texas  Water Quality Board
for professional involvement, to the Texas National Guard for
conducting the tributary sampling phase of the Survey, and to
those Texas wastewater treatment plant operators who voluntarily
provided effluent samples.

     Hugh C. Yantis, Jr., Executive Director of the Texas Water
Quality Board, and John B. Latchford,  Jr., Director, and the staff
of the Field Operations Division provided invaluable lake documen-
tation and counsel  during the Survey,  reviewed the preliminary
reports, and provided critiques most useful  in the preparation of
this Working Paper series.

     Major General  Thomas Bishop, the Adjutant General of Texas,
and Project Officer Colonel. William L. Seals, who directed the
volunteer efforts of the Texas National  Guardsmen, are also grate-
fully acknowledged for their assistance to the Survey.

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                                 iv
                  NATIONAL EUTROPHICATION SURVEY
                         STUDY RESERVOIRS
                          State of Texas
NAME
Amistad
Bastrop
Bel ton
Braunig
Brownwood
Buchanan
Caddo
              •
Calaveras
Canyon
Colorado City
Corpus Christi

Diversion
Eagle Mountain
Fort Phantom Hill
Houston
Kemp
Lake O'The Pines

Lavon
Lewisvilie (Garza-Little Elm)
Livingston
COUNTY
Val Verde
Bastrop
Bell, Coryell
Bexar
Brown
Burnet, Llano
Harrison, Marion, TX;
Caddo Parish, LA
Bexar
Comal
Mitchell
Jim Wells, Live Oak, San
Patricio
Archer, Baylor
Tarrant, Wise
Jones
Harris
Baylor
Camp, Marion, Morris,
Upshur
Collin
Denton
Polk, San Jacinto, Trinity,
Walker

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Lyndon B. Johnson

Medina

Meredith


0. C. Fisher (San Angelo)

Palestine


Possum Kingdom


Sam Rayburn



Somerville

E. V. Spence

Stamford

Stillhouse Hollow

Tawakoni

Texoma


Travis

Trinidad

Twin Buttes

White River

Whitney

Wright Patman (Texarkana)
Burnet, Llano

Bandera, Medina

Hutchinson, Moore,
Potter

Tom Green

Anderson, Cherokee,
Henderson, Smith

Palo Pinto, Stephens,
Young

Angelina, Jasper
Nacogdoches, Sabine, San
Augustine

Burleson, Lee, Washington

Coke

Haskell

Bell

Hunt, Rains, Van Zandt

Cooke, Grayson TX; Bryan,
Johnston, Love, Marshall, OK

Burnet, Travis

Henderson

Tom Green

Crosby

Bosque, Hill

Bowie, Cass

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   Tributary Sampling Site
X Lake Sampling Site
o           to           20 Km

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                            AMISTAD RESERVOIR
                             STORE! NO. 4801

I.  CONCLUSIONS
    A.  Trophic Condition:
            Survey data indicate that Amistad Reservoir is mesotrophic;
        i.e., moderately supplied with nutrients.  Whether nutrient
        enrichment is beneficial or deleterious depends on the actual
        or potential effect on the uses of  the reservoir.  In this
        regard, the Texas Water Quality Board has indicated that there
        is no known impairment of the designated beneficial uses of
        Amistad Reservoir.
            Amistad ranked fifth in overall trophic quality when the
        39 Texas reservoirs sampled in 1974 were compared using a
        combination of six parameters*.  Two of the water bodies had
        less median total phosphorus, 11 had less and six had the same
        median dissolved orthophosphorus, 36 had less median inorganic
        nitrogen, none of the other reservoirs had less mean chlorophyll
        a_, and none had greater mean Secchi disc transparency.
            Survey limnologists did not observe any nuisance conditions
        during their sampling visits.  However, marked depression of
        hypolimnetic dissolved oxygen occurred at stations 1, 2, and 3
        in August and October.
    B.  Rate-Limiting Nutrient:
            The algal assay results indicate that Amistad Reservoir was
        phosphorus limited at the times the samples were collected (03/
        05-06/74 and 10/29-30/74).  The reservoir data indicate phosphorus
        limitation at all sampling stations and times.
* See Appendix A.

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C.  Nutrient Controllability:
        1.  Point sources—No known point sources impacted Amistad
    Reservoir during the sampling year.
        The present phosphorus loading of 0.98 g/m2/year is over
    two times that proposed by Vollenweider (Vollenweider and Dillon,
    1974) as a eutrophic loading (see page 13).  If Vollenweider's
    eutrophic loading level is applicable to Texas reservoirs,
    increasingly undesirable responses to enrichment are likely to
    occur.
        2.  Non-point sources—The phosphorus contributions of non-
    point sources accounted for all of the load during the sampling
    year.  The Rio Grande River contributed 92.3%, Devils River con-
    tributed 1.8%, and the Pecos River contributed 1.1%.  The ungaged
    minor tributaries and immediate drainage contributed an estimated
    3.0%.
        The nutrient export rates of all of the gaged tributaries were
    quite low (page 12), and it is likely that any significant reduc-
    tion in non-point phosphorus contributions would be difficult to
    accomplish.

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II.   RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"

     A.   Morphometry  :

         1.   Surface area:   262.48 kilometers2.

         2.   Mean depth:   16.5 meters.

         3.   Maximum depth:  >61.0 meters.

         4.   Volume:  4,330.920 x 106 m3.

         5.   Mean hydraulic retention time:   3.8 years  (based  on  outflow).

     B.   Tributary and Outlet:
         (See Appendix C  for flow data)

         1.   Tributaries  -

                                               Drainage        Mean  flow
             Name                              area (km2)*     (m3/sec)*

             Rio Grande River                   209,271.9        38.820
             Evans Creek                             114.5         0.019
             Devil's River                       10,259.0        10.900
             Pecos River                          91,116.1          7.410
             Minor tributaries &
              immediate drainage -                7,804.9         1.357

                            Totals             318,566.4         58.506

         2.   Outlet -

             Rio Grande River                  318,828.9**        36.180**

     C.   Precipitation***:

         1.   Year of sampling:  44.7 centimeters.

         2.   Mean annual:   42.9 centimeters.
 t Table of metric conversions—Appendix B.
 tt Ito, 1976.
 * For limits of accuracy,  see Working Paper No.  175,  "...Survey Methods,
   1973-1976".
 ** Includes area of reservoir;  lesser outflow due to  discharge of springs
    below the dam and evaporation (Ligner,  1976).
 *** See Working Paper No.  175.

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III.   LAKE WATER QUALITY SUMMARY



      Amistad Reservoir was sampled four times in 1974 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 May, August, and October, and



  four stations in March (see map, page vi).  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 March and October visits, two 18.9-liter depth-integrated samples



  were 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 61.0 meters at station 1,



  39.3 meters at station 2, 53.6 meters at station 3, 23.2 meters at



  station 4, and 42.7 meters at station 5.



      The sampling results are presented in full in Appendix D and are



  summarized in the following table (the August nutrient samples were



  not properly preserved and were not analyzed).

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                             A. SUMMAHY OF PHYSICAL  AND
                                  CHEMICAL CHARACTERISTICS  KOK  AMISTAD  LAKE
                                   STO^ET COOE <*801
PARAMETER

TEMP (C)

OISS OXY (MG/L)

CNDCTVY  (MCKOMO)

PH (STAND UNITS)


TOT ALK  (MG/L)

TOT P  (MG/L)

ORTHO P  (MG/L)

N02*N03  (MG/L)

AMMONIA  (MG/L)

KJEL N  (MG/L)

INORG N  (MG/L)

TOTAL N  (MG/L)

CHLKPYL  A  (UG/L)

SECCHI  (METERS)
     RANGE

 12.1  -  16.7

  7.4  -  10.6

 610.  - 1875.

  7.9  -   6.4

 137.  -  178.

0.006  - 0.013

0.005  - 0.010

0.210  - 0.680

0.020  - 0.060

0.200  - 0.400

0.240  - 0.700

0.430  - 0.880   0.633

  0.2  -   1.5

  3.6  -   5.8
NG ( 3/
TES
MEAN
13.5
9.0
752,
8.2
147.
0.008
0.008
0.358
0.033
0.275
0.392
0.633
0.5
4.5
5/74)

MEDIAN
13.1
9.1
C.75.
8.3
144.
0.007
0.008
0.285
0.030
0.300
0.335
0.585
0.2
4.4
-NO SAMPLING <

rt
13.7
0.4
742.
7.4
108.
0.007
0.002
0.210
0.040
0.200
0.250
0.440
1.2
2.1
5
ANuE
- 25.4
- 8 • ^
- 965.
8.4
- 146.
- 0.0*5
- 0.007
- 0.670
- 0.360
- 0.900
- 0.810
- 1.340
2.7
4.0
SITES
MEAN
21.6
6.1
861.
8.0
131.
0.013
0.004
0.360
0.079
0.348
0.439
0.708
1.8
3.3
5/14/74)

MEDIAN
23.5
6.8
865.
8.1
131.
0.010
0.003
0.350
0.050
0.300
0.430
0.590
1.7
3.4
3f*U SAMPLING ( 3/
5 SITES
rtANGE MEAN
14.4 - 27.7 22.9
0.1 - 8.6 4.7
778. - 1231. 945.
7.6 - 8.6 8.1
6/74)

MEDIAN
26.4
6.4
961.
8.2
(tOfHHtO - tHHHHtttOO OttOOOOO OO OOQO O
eooctxt _oo«eo«««oe»«i>tt«4H
OOtKHJO -OO«HXHKHX»OO(HXH»O _««t
>««««0
>0OoOO
>eee«e
>««««««
ttooooe -oooooooo«»oooo»ooo»ooo
...00. ..«•.............<
2.7 - 4.3 3.1
2.3 - 5.5 3.7
>0»0.*
2.8
3.2

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                             A. SUMMARY  OF  PHYSICAL  AND CHEMICAL CHAPACTE*ISTICS FO* AMISTAO LAKE
                                                          STORdT CODE 4801

                             4TH  SAMPLING  <10/29/7<»>
PARAMETER

TEMP (C)

DISS OXY (MG/L)

CNDCTVY (MCROMO)

PH (STAND UNITS)

TOT ALK (MG/L)

TOT P (MG/L)

ORTHO P (MG/L)

N02+N03 (MG/L)

AMMONIA (MG/L)

KJEL N  (MG/L)

INORG N (MG/L)

TOTAL N (MG/L)

CHLRPYL A  (UG/L)

SECCHI  (METERS)
     RANGE

 16.<»  -  21.5

  0.2  -

 446.  - 1745.

  7.4  -

 109.  -  158.

0.013  - 0.037

0.011  - 0.022

0.140  - 1.680

0.020  - 0.070

0.200  - 0.500

0.190  - 1.720

0.340  - 2.080

  1.1  -

  0.9  -
5
5
8
•
1
•
7
2
0
0
0
0
0
7
7
SITES
MEAN
20.4
5.4
812.
7.7
131.
0.021
0.016
0.683
0.027
0.274
0.710
0.957
2.4
1.8
MEDIAN
21.0
6.3
no.
7.8
127.
0.021
0.015
O.bVO
0.020
0.300
0.615
0.8d5
2.0
1.9

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B.  Biological characteristics:

    1.  Phytoplankton -
        Sampling
        Date

        03/05/74
        05/15/74
        08/07/74
        10/29/74
Dominant
Genera

1.   Cysts
2.   Chroomonas sp.
3.   Coelastrum sp.
4.   Cryptomonas sp.
5.   Cyclotella sp.
    Other genera

            Total

1.   Coelastrum sp.
2.   Cryptomonas sp.
0   Chroomonas sp.
    Dinobryon SJD.
    Fragilaria sp.
    Other genera
                              3.
                              4
                              5
                Total

1.  Navicula S£.
2.  Chroomonas sp.
3.  Oscill ataria sp.
4.  Peridinium sp.
5.  Centric diatoms
    Other genera
1.
2.
3.
4.
5.
                                              Total
Coelastrum sp.
Chroomonas sp.
Cryptomonas sp.
Melosira sp.
Scenedesmus sp.
Other genera
Algal Units
per ml	

   262
   174
    87
    87
    87
    44

   741

   161
   107
    40
    40
    40
    68

   456

   739
   370
   269
   168
   101
   268

 1,915

    30
    20
    20
    20
    10
    21
                                              Total
                               121

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2.  Chlorophyll a -
C.
    Sampling
    Date

    03/05-06/74
    05/14-15/74
    08/06-07/74
                              Station
                              Number

                                 1
                                 2
                                 3
                                 4
                                 5

                                 1
                                 2
                                 3
                                 4
                                 5

                                 1
                                 2
                                 3
                                 4
                                 5

                                 1
                                 2
                                 3
                                 4
                                 5
Limiting Nutrient Study:

1.   Autoclaved, filtered, and nutrient spiked -

    a.  March sample -

        (1).  Stations 1 and 2 -
          Chlorophyll  a
    10/29-30/74
    Spike (mg/1)

    Control
    0.050 P
    0.050 P  + 1.0 N
    1.0 N
                         Ortho P
                         Cone, (mg/1)

                            <0.005
                            <0.055
                            <0.055
                            <0.055
Inorganic N
Cone, (mg/1)

    0.299
    0.299
    1.299
    1.299
                0.2
                0.2
                0.3
                1.5
                1.2
                2.2
                1.4
                2.7
                1.7

                2.7
                2.8
                2.8
                4.3
                2.9

                1.1
                2.0
                3.3
                1.8
                3.7
Maximum yield
(mg/1-dry wt.)

    0.1
    5.7
   11.3
    0.1

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                (2).  Stations 3 and 4 -
        2.
            Spike (mg/1)
Ortho P
Cone, (mg/1)
Inorganic N
Cone, (mg/1)
Maximum yield
(mg/1-dry wt.)
Control
0.050 P
0.050 P + 1.
1.0 N
b. October
<0.005
<0.055
0 N <0.055
<0.005
sample -
(1). Stations 1, 2, and
Spike (mg/1)
Control
0.050 P
0.050 P + 1.
1.0 N
Ortho P
Cone, (mg/1)
0.009
0.059
0 N 0.059
0.009
0.525
0.525
1.525
1.525

3 -
Inorganic N
Cone, (mg/1)
0.424
0.424
1.424
1.424
0.1
10.8
11.4
0.1


Maximum yield
(mg/1 -dry wt.)
0.3
12.5
20.0
0.2
(2). Stations 4 and 5 -
Spike (mg/1)
Control
0.050 P
0.050 P + 1.
1.0 N
Discussion -
Ortho P
Cone, (mg/1)
0.005
0.055
0 N 0.055
0.005

The control yields of the
Inorganic N
Cone, (mg/1)
(1.058)*
(1.058)
(2.058)
(2.058)

Maximum yield
(mg/1 -dry wt. )
0.2
13.0
15.6
0.2

assay alga, Selenastrum capri-
            cornutum, indicate that the potential  primary productivity

            of Amistad Reservoir was low in March and moderate in October.

            The significant increases in yields with the addition of ortho-

            phosphorus and the lack of changes in yields when only nitrogen

            was added indicate phosphorus limitation.
* Sample for nitrogen analysis was inadvertently discarded.  The reser-
  voir data indicate a mean inorganic nitrogen concentration of 1.058 mg/1.

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                     10
    The reservoir data also indicate phosphorus limitation;
i.e., the mean inorganic nitrogen to orthophosphorus ratios
were 44 to 1 or greater in March, May, and October.

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                                  11
IV.   NUTRIENT LOADINGS
     (See Appendix E for data)
     For the determination of nutrient loadings,  the Texas National
 Guard collected monthly near-surface grab samples from each of the
 tributary sites indicated on the map (page vi),  except for the high
 runoff month of April when two 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 Texas 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*.
     Because of lack of flow, Evans Creek was not sampled, and the
 nutrient loads for this stream and the unsampled "minor tributaries
 and immediate drainage" ("II"  of U.S.G.S.) were  estimated using the
 means of the nutrient loads at stations C-l and  E-l, in kg/km2/year,
 and multiplying the means by the Evans Creek and II areas in km2.
     No known point sources impacted Amistad Reservoir during the sam-
 pling year.
   See Working Paper No.  175.

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                               12
  A.  Waste Sources:
      1.  Known municipal - None
      2.  Known industrial - None
  B.  Annual Total Phosphorus Loading - Average Year:
      1.  Inputs -
                                            kg P/           % of
          Source                            yr              total
          a.  Tributaries (non-point load) -
              Rio Grande River              237,445          92.3
              Evans Creek                       115          <0.1
              Devil's River                   4,585           1.8
              Pecos River                     2,750           1.1
          b.  Minor tributaries & immediate
               drainage  (non-point load) -    7,805           3.0
          c.  Known municipal STP's - None
          d.  Septic tanks - Unknown            ?
          e.  Known industrial - None
          f.  Direct precipitation* -         4,595           1.8
                      Total                 257,295         100.0
      2.  Outputs -
          Lake outlet - Rio Grande River     14,320
      3.  Net annual P accumulation - 242,975 kg.
See Working Paper No. 175.

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                               13
  C.  Annual Total Nitrogen Loading - Average Year:

      1.  Inputs -

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

              Rio Grande River            2,106,250          49.6
              Evans Creek                     5,555           0.1
              Devil's River                 938,080          22.1
              Pecos River                   533,080          12.6

          b.  Minor tributaries & immediate
               drainage (non-point load) -  378,540           8.9

          c.  Known municipal STP's - None

          d.  Septic tanks - Unknown            ?

          e.  Known industrial - None

          f.  Direct precipitation* -       283,375           6.7

                      Total               4,244,880         100.0

      2.  Outputs -

          Lake outlet - Rio Grande River  1,193,690
       o
      3.  Net annual N accumulation - 3,051,190 kg.

  D.  Non-point Nutrient Export by Subdrainage Area:

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

      Rio Grande River                           1             10
      Devil's River                             <1             91
      Pecos River                               <1              6
See Working Paper No. 175.

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                             14
E.  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/in2/yr             0.98       0.93        16.2       11.6
    Vollenweider phosphorus loadings
     (g/m2/yr) based on mean depth and mean
     hydraulic retention time of Amistad Reservoir:
        "Dangerous"  (eutrophic loading)          0.40
        "Permissible"  (oligotrophic loading)     0.20

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                                 15
V.  LITERATURE REVIEWED

    Ito, Cruz, 1976.  Personal communication (morphometric data).
        Intn. Boundary & Water Comm., El Paso.

    Ligner, James J., 1976.  Personal communication (tributary flows)
        Intn. Boundary & Water Comm., El Paso.

    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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VI.   APPENDICES
                                   16
                                  APPENDIX A
                                 LAKE RANKINGS

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PERCENT or LAKES
LAKE'
CODE  LAKE NAME
MIGHER VALUED (NUMBER OF LAKES
                                                          HICME.H
      AMISTAO LAKE
4802  BASTROP LAKE
4803  8ELTON RESERVOIR
4804  BRAUNIG LAKE
4805  BROWNWOOD LAKE
4806  LAKE BUCHANAN
4807  CADOO LAKE
4808  CALAVERAS LAKE
4809  CANYON RESERVOIR
4810  LAKE COLORADO CITY
4811  CORPUS CRISTI LAKE
4812  DIVERSION LAKE
4813  EAGLE MOUNTAIN LAKE
4814  FT PHANTOM HILL LAKE
4815  GARZA LITTLE ELM RESERVO
4816  KEMP LAKE
4817  HOUSTON LAKE
4818  LAKE OF THE PINES
4819  LAVON RESERVOIR
4820  LIVINGSTON LAKE
4821  LYNDON 8 JOHNSON LAKE
4822  MEDINA LAKE
4823  LAKE MEREDITH
4824  PALESTINE LAKE
4825  POSSUM KINGDOM RESERVOIR
4826  SAN ANGELO RESERVOIR
4827  SAM RAYBURN RESERVOIR
4828  E V SPENCE RESERVOIR
MEDIAN
TOTAL P
95
79
92
5
66
47
26
45
99
39
8
68
71
24
34
76
16
54
21
3
39
99
82
54
74
13
59
50
( 36)
( 30)
( 35)
( 2)
t 25)
( 18)
( 10)
( 17)
( 37)
( 14)
( 3)
( 26)
( 27)
( 9)
( 13)
( 29)
( 6)
( 20)
( 8)
( 1)
( 14)
( 37)
f 31)
( 20)
( 28)
( 5)
( 22)
( 19)
MEDIAN
INO'G N
5
76
26
42
70
21
91
100
8
76
47
83
91
66
13
61
16
76
29
3
11
0
91
32
91
45
39
83
( 2)
( 28)
( 10)
( 16)
( 26)
( 7)
< 33)
I 38)
( 3)
( 28)
( 18)
( 3D
( 33)
f 25)
( 5)
( 22)
( 6)
( 28)
< ID
( 1)
( 4)
( 0)
( 33)
( 12)
( 33)
( 17)
( 15)
(3D
500-
MEAN SEC
100
82
97
50
29
74
42
47
95
26
18
32
34
21
16
55
0
66
3
39
53
89
71
63
84
8
68
45
( 38)
( 3D
( 37)
( 19)
( 11)
( 28)
( 16)
( 18)
( 36)
( 10)
( 7)
( 12)
( 13)
( 8)
( 6)
< 21)
( 0)
( 25)
< 1)
< 15)
( 20)
( 34)
( 27)
( 24)
( 32)
< 3)
( 26)
( 17)
MEAN
CHLOKA
100
47
68
8
87
63
32
11
97
42
13
29
79
74
34
55
24
39
84
26
66
37
95
53
58
0
76
50
( 38)
( 18)
( 26)
< 3)
( 33)
( 24)
( 12)
( 4)
( 37)
( 16)
( 5)
< ID
( 30)
( 28)
( 13)
( 21)
( 9)
( 15)
( 32)
( 10)
( 25)
( 14)
( 36)
( 20)
( 22)
( 0)
( 29)
( 19)
16-
MIN DO
39 1
17 1
17 1
49 (
58 <
17 (
76 1
67 1
49 <
88 1
61 1
97 1
79 1
95 1
55 1
84 1
72 i
17 i
100 i
17 i
39 i
17
39
49
17
88
17
17
; 14)
[ 0)
: 0)
17)
; 22)
: o>
; 29)
: 25)
: 17)
: 33)
1 23)
: 37)
; 30)
I 36)
t 21)
[ 32)
I 27)
! 0)
I 38)
t 0)
I 14)
( 0)
( 14)
( 17)
( 0)
( 33)
( 0)
( 0)
MEDIAN
DISS OrtThO P
63
92
84
5
94
39
30
92
97
39
8
63
76
16
21
92
11
46
21
3
30
100
63
51
63
46
63
76
( 21)
< 34)
( 3D
( 2)
( 3D
( 14)
( 10)
( 34)
( 37)
( 14)
< 3)
( 21)
( 28)
( 6)
( 7)
( 34)
( 4)
( 17)
( 7)
( 1)
( 10)
( 38)
( 21)
( 19)
( 21)
( 17)
( 21)
( 28)
INOtX
NO
402
393
384
159
394
261
297
362
445
310
155
372
430
296
173
423
139
298
258
91
238
342
441
302
387
200
322
321

-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES *ITH HIGHER  VALUES)
LAKE
CODE  LAKE NAME
4829  SOMERVILLE LAKE
4830  STAMFORD LAKE
4831  STILLHOUSE HOLLOW RESE*V
4832  TAWAKONI LAKE
4833  TEAARKANA LAKE
4834  TEXOMA LAKE
4835  TRAVIS LAKE
4836  TRINIDAD
4837  TWIN BUTTES RESERVOIR
4838  WHITE RIVER RESERVOIR
4839  WHITNEY LAKE
MEDIAN
TOTAL P
29
18
88
32
11
39
88
0
59
84
63
( 11)
( 7)
( 33)
< 12)
( 4)
( 14)
< 33)
( 0)
( 22)
( 32>
( 24)
MEDIAN
INORG N
55
97
37
70
51
34
21
61
21
61
51
( 21)
'. 37)
( 14)
( 26)
( 19)
( 13)
( 7)
( 22)
( 7)
( 22)
( 19)
500-
MEAN
24
5
87
37
13
61
92
11
58
76
79
SEC
( 9)
( 2)
( 33)
( 14)
< 5)
( 23)
( 35)
( 4)
( 22)
( 29)
( 30)
MEAN
CHLORA
3
18
92
21
16
45
82
5
61
89
71
( 1)
( 7)
( 35)
( 8)
( 6)
( 17)
( 3D
( 2)
( 23)
( 34)
( 27)
15-
MIN 00
67
82
17
63
72
17
17
92
49
17
17
( 25)
( 3D
( 0>
( 24)
( 27)
( 0)
( 0)
( 35)
< 17)
( 0)
( 0)
MEDIAN
DISS U^THO H
30
39
51
30
13
21
84
0
63
63
76
( 10)
( 14)
( 19)
( 10)
( 5)
I 7)
( 31)
( 0)
( 21)
( 21)
( 28)
INDEX
NO
20tJ
259
372
2*3
176
217
J84
169
311
390
357

-------
LAKES PtAN'KEO Bf ;NOt.x NOS.
RANK  LAKE CODE  LAKE NAME
 2  4823
 3  4813
 4  4816
 5  4801
 6  4805
 7  480?
 8  4838
 9  4825
10  4835
11  4803
12  4831
13  4812
14  4808
15  4839
16  4822
17  4827
18  4828
19  4837
20  4810
21  4824
22  4818
23  4807
24  4814
25  4806
26  4830
27  4819
28  4832
                 c&Nro.N RESERVOIR
                 LAKE MEREDITH
                 EAGLE MOUNTAIN LAKE
                 KEMP LAKE
                 AMISTAO LAKE
                 BROnNWOOD LAKE
                 BASTROP LAKE
                 WHITE RIVER RESERVOIR
                 POSSUM KINGDOM RESERVOIR
                 TRAVIS LAKE
                 BELTON RESERVOIR
                 STILLHOUSE HOLLOW RESERV
                 DIVERSION LAKE
                 CALAVERAS LAKE
                 WHITNEY LAKE
                 MEDINA LAKE
                 SAM RAYBURN RESERVOIR
                 E V SPENCE RESERVOIR
                 TWIN BUTTES RESERVOIR
                 LAKE COLORADO CITY
                 PALESTINE LAKE
                 LAKE OF THE PINES
                 CADOO LAKE
                 FT PHANTOM HILL LAKE
                 LAKE BUCHANAN
                 STAMFORD LAKE
                 LAVON RESERVOIR
                 TArfAKON.1 LAKE
INDEX NO

   445
   441
   430
   423
   402
   394
   393
   390
   387
   384
   384
   372
   372
   362
   357
   342
   322
   321
   311
   310
   302
   298
   297
   296
   261
   259
   258
   253

-------
LAKES RANKED BY INDEX NOS.
RANK  LAKE CODE  LAKE NAME               INDEX NO
  29  4eJ21       LYNDON B JOHNSON LAKE      238
  30  4834       TEXOMA LAKE                21?
  31  4829       SOMEHVILLE LAKE            208
  32  4826       SAN ANGELO RESERVOIR       200
  33  4833       TEXAKKANA LAKE             176
  34  4815       GARZA LITTLE ELM RESERVO   173
  35  4836       TRINIDAD                   169
  36  4804       BRAUNIG LAKE               159
  37  4811       CORPUS CRIST1 LAKE         155
  38  4817       HOUSTON LAKE               139
  39  4820       LIVINGSTON LAKE             91

-------
LAKES RANKED BY INDE* NOS.
RANK  LAKE CODE  LAKE NAME                INDEX NO

   1  4809       CANVON RESERVOIR           445
   2  4o23       LAKE MEREDITH              441
   3  4813       EAGLE MOUNTAIN LAKE        430
   4  4816       KEMP LAKE                   423
   5  4801       AMISTAO LAKE               402
   6  4805       BROwNWOOD  LAKE             394
   7  4802       8ASTRUP LAKE               393
   8  4838       »HITE RIVER RESERVOIR      390
   9  4825       POSSUM KINGOOM RESERVOIR   387
  10  4835       TRAVIS LAKE                384
  11  4803       8ELTON RESERVOIR           384
  12  4831       STILLHOUSE HOLLOW RESERV   372
  13  4812       DIVERSION  LAKE             372
  14  4808       CALAVERAS  LAKE             362
  15  4839       WHITNEY LAKE               357
  16  4822       MEDINA LAKE                342
  17  4827       SAM RAYBURN RESERVOIR      322
  18  4828       E V SPENCE RESERVOIR       321
  19  4837       TWIN BUTTES RESERVOIR      311
  20  4810       LAKE COLORADO CITY         310
  21  4824       PALESTINE  LAKE             302
  22  4818       LAKE OF THE PINES          298
  23  4807       CADOO LAKE                 297
  24  4814       FT PHANTOM HILL LAKE       296
  25  4806       LAKE BUCHANAN              261
  26  4830       STAMFORD LAKE              259
  27  4819       LAVON RESERVOIR            258
  28  4832       TAdAKONJ LAKE              253

-------
LAKES RANKED BY INDEX NOS.
RANK  LAKE CODE  LAKE NAME               INDEX NO
  29  4821       LYNDON 8 JOHNSON LAKE      238
  30  483<»       TEXOMA LAKE                21?
  31  4829       SOMEWVILLE LAKE            208
  32  4826       SAN ANGELO HESERVOIR       200
  33  4833       TEXAKKANA LAKE             176
  34  4815       GARZA LITTLE ELM RESERvO   173
  35  4836       TRINIDAD                   169
  36  4804       BRAUNIG LAKE               159
  37  4811       CORPUS CRIST1 LAKE         155
  38  4817       HOUSTON LAKE               139
  39  4820       LIVINGSTON LAKE             91

-------
    APPENDIX B





CONVERSION FACTORS

-------
                CONVERSION FACTORS


Hectares x 2.471 = acres

Kilometers x 0.6214 = miles

Meters x 3.281 = feet

Cubic meters x 8.107 x 10"4 = acre/feet

Square kilometers x 0.3861 = square miles

Cubic meters/sec x 35.315 = cubic feet/sec

Centimeters x 0.3937 = inches
   i
Kilograms x 2.205 = pounds

Kilograms/square kilometer x 5.711 = Ibs/square mile

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

-------
                                             FLOW INFORMATION FOR TEXAS
                                                                05/03/76
LA
-------
                                   TRIBUTARY FLO*  INFORMATION FOR
                                                                                           05/03/76
LAKE CODE <*801     AMISTAO



     MEAN MONTHLY FLOwS AND DAILY FLOWS(CMS)




TRIBUTARY   MONTH    YEAR    MEAN FLO*  DAY




4801B1
 4801C1
 4801E1
 4801ZZ
FLO*  DAY
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
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
74
74
74
74
75
75
75
75
75
75
75
75
3.143
0.255
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.212
0.0
239.561
18.831
14.130
12.120
11.100
12.006
10.392
9.968
10.336
9.826
13.281
11.525
382.277
52.386
28.317
17.443
13.479
12.969
10.194
9.288
8.382
6.994
11.610
8.325
188.307
14.725
11.044
9.628
8.778
9.345
8.212
7.929
7.929
7.646
10.477
9.061
7
8
7
6
7
6
1
11
17
3
16
7
7
8
7
6
7
6
1
11
17
5
16
7
7
8
' 7
6
7
6
1
11
17
5
16
7












0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
6.966
15.036
15.319
12.374
11.553
12.799
10.704
10.222
9.628
9.968
9.543
12.091
4.106
72.491
33.980
18.916
14.555
14.470
10.930
9.543
7.617
7.306
6.711
7.674












                  FLO*  JAY
                                    FLOW
                                                           23
                                                                     0.0
                                                           23
                                                                     9.769
                                                           23
                                                                     8.863

-------
        APPENDIX D





PHYSICAL and CHEMICAL DATA

-------
STORET RETRIEVAL DATE 7b/02/il
                                                                  480101
                                                                 29 27  35.0  101
                                                                 AMISTAD Lft"£
                                                                         TEXAS
                                                                    03 20.0
  DATE   TIME DEPTH
  FROM    OF
   TO    DAY  FEET
74/03/05 15
         15
         15
         15
         15
         15
         15
74/05/14 15
         15
         15
         15
         15
         15
74/08/06 15
         15
         15
         15
         15
         15
         15
         15
74/10/29 14
         14
         14
         14
         14
         14
         14
         14
         14
         14
00 0000
00 0010
00 0030
00 0060
00 0100
00 0150
00 0200
00 0000
00 0005
00 0020
00 0045
00 0090
00 0170
45 0000
45 0005
45 0015
45 0047
45 0065
45 0085
45 0125
45 0170
15 0000
15 0005
15 0020
15 0040
15 0060
15 0085
15 0090
15 0120
15 OU5
15 0176
 00010
WATER
 TEMP
 CENT

   13.2
   13.0
   12.8
   12.5
   12.3
   12.2
   12.2
   24.0
   23.7
   23.5
   21.0
   15.1
   13.7
   26.5
   26.5
   26.4
   26.3
   23.6
   16.6
   14.8
   14.4
   21.0
   21.0
   21.0
   21.0
   20.9
   20.9
   20.1
   18.3
   16.4
   16.4
11EPALES

00300
DO

MG/L

9.2
9.2
9.2
9.0
10.6
9.0

7.6
8.0
7.4
6.0
6.4
7.6
7.6
7.6
7.2
4.0
0.6
2.4
2.8
7.2
7.2
7.2
7.4
7.4
6.0
2.2
1.4
0.2
0.2

00077 00094
TRANSP CNOUCTVY
SECCHI FIELD
INCHES MICROMHO
164 645
642
655
667
670
672
677
156 865
865
862
856
760
742
216 998
997
998
997
967
814
787
782
107 708
708
710
714
719
733
833
831
747
746
4
00400
PH

SU
6.40
8.30
8.30
8.30
8.30
8.30
8.30
8.30
8.40
8.40
8.20
8.00
7.90
8.40
8.40
8.40
8.40
7.70
7.70
7.60
7.90
7.96
7.95
7.94
7.92
7.87
7.80
7.47
7.39
7.42
7.42

00410
T ALK
CAC03
MG/L
144
145
144
143
144
144
144
129
129
127
131
136
137








123
124
114
117
118
122
123
134
150
152
2111202
0205
00610
NH3-N
TOTAL
MG/L
0.030
0.030
0.030
0.040
0.030
0.030
0.030
0.090
0.050
0.060
0.060
0.050
0.050








0.030
0.030
0.020
0.020
0.020
0.020K
0.030
0.020K
0.040
0.050
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.300
0.300
0.300
0.200
0.300
0.300
0.200
0.600
0.200
0.200
0.200K
0.200K
0.200K








0.300
0.300
0.200
0.200
0.200
0.300
0.200
0.200K
0.200K
0.200K
00630
N02^N03
N-TOTAL
MG/L
0.250
0.270
0.260
0.260
0.240
0.240
0.230
0.250
0.240
0.250
0.280
0.380
0.390








0.460
0.470
0.470
0.480
0.510
0.620
0.810
0.680
0.170
0.140
00671
PMOS-OIS
ORTHO
MG/L P
"o.ooe
'0.009
0.008
0.008
.0.005
0.006
0.006
'0.006
.0.002
0.003
0.003
0.002
0.002








0.013
0.014
'0.013
0.012
'0.014
0.015
0.017
0.019
'0.018
0.018
          K VALUE KNOWN TO 6E
          LESS THAN INDICATED

-------
STOfEV RETRIEVAL OAlc 7f../02/li
                                                                   460101
                                                                  29 27 35.0 101 03 20.0
                                                                  AMISTAO Lt.vE
                                                                  48465   TEXAS
                                                                  11EPALES
                                                                  4
 2111202
0205 FEET
                                                                                                 DEPTH
DATE
FROM
TO
74/03/05






74/05/14





74/08/06

74/10/29











00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
15
15
15
15
15
15
15
15
15
15
15
15
IS
15
15
14
14
14
14
14
14
14
14
14
14
14
14
00
00
00
00
00
00
00
00
00
00
00
00
00
45
45
15
15
15
15
15
15
15
15
15
15
15
15
0000
0010
0030
0060
0100
0150
0200
0000
0005
0020
0045
0090
0170
0000
0047
0000
0001
0005
0010
0020
0040
0060
0085
0090
0120
0145
0176
MG/L P
'0,
•o,
0.
0,
0,
'o,
0,
'0,
0.
*0,
0,
T),
0,


0,

0,

T>,
0,
•o,
0,
1),
0,
'0,
0,
.006
,007
.006
.006
,006
.006
.006
.011
.008
.008
.007
.007
.008


,013

.030

.028
,027
,028
.029
.018
.033
.029
.029
UG/L PERCENT
0.2


..-,



1.2


1.0


2.7
1.0
1.1
50.0

1.0









-------
STORET RETRIEVAL OAT£ 76/0?/11
                                                                   480102
                                                                  29 33 30.0 100 58 30.0
                                                                  AMISTAD LArxE
                                                                  48465   TLXAS
DATE
FROM
TO
74/03/05





74/05/14





74/08/07









74/10/29







00010
TIME DEPTH WATER
OF TEMP
DAY FEET
14
14
14
14
14
14
15
15
15
15
15
15
17
17
17
17
17
17
17
17
17
17
13
13
13
13
13
13
13
13
35
35
35
35
35
35
45
45
45
45
45
45
45
45
45
45
45
45
45
45
45
45
30
30
30
30
30
30
30
30
0000
0010
0030
0060
0090
0124
0000
0005
0020
0035
0060
0115
0000
0005
0015
0029
0040
0055
0070
0085
0100
0115
0000
0005
0020
0040
0060
0080
0090
0129
CENT
16
15
12
12
12
12
24
24
24
23
16
14
27
27
27
26
25
24
21
17
16
15
21
21
20
20
20
20
19
17

.7
.0
.8
.1
.1
.1
.8
.3
.2
.5
.9
.0
.7
.3
.0
.5
.1
.4
.3
.0
.1
.0
.2
.2
.9
.9
.7
.3
.6
.1
11EPALES

00300
DO

MG/L

9.4
9.0
8.8
8.8
8.8

8.4
8.0
8.0
5.0
5.0
6.1
8.6
7.6
7.0
4.4
3.6
0.4
0.1
0.1
0.4
6.0
6.2
5.8
5.8
5.8
2.8
1.2
0.4

.00077 00094
TRftNSP CNDUCTVY
SECCHl FIELD
INCHES MICROMHO
140 664
654
610
625
632
644
156 836
830
830
813
753
760
120 829
824
858
946
955
947
874
804
792
778
73 446
446
451
469
544
544
631
718
4
00400
PH

su
8.30
8.30
8.30
8.30
8.30
8.30
8.20
8.30
8.30
8.30
7.90
7.80
8.30
8.50
8.40
8.40
7.90
7.90
7.60
7.60
7.60
7.60
7.75
7.75
7.65
7.67
7.72
7.47
7.43
7.4y

00410
T ALK
CAC03
MG/L
147
144
148
144
144
143
131
131
130
131
139
139










130
127
127
126
125
132
135
154
2111202
0130
00610
NH3-N
TOTAL
MG/L
0.020
0.020
0.020
0.050
0.040
0.060
0.070
0.050
0.050
0.050
0.050
0.050










0.030
0.020
0.020K
0.030
0.020
0.030
0.020K
0.070
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.400
0.300
0.300
0.300
0.400
0.300
0.500
0.200
0.300
0.200
0.200K
0.200K










0.400
0.300
0.300
0.200
0.200
0.200
0.200K
0.200K
00630
N02VN03
N-TOTAL
MG/L
0.470
0.330
0.420
0.300
0.260
0.270
0.360
0.340
0.320
0.350
0.390
0.400










0.590
0.590
0.580
0.530
0.440
0.600
0.520
0.220
00671
PMOS-OIS
ORTHO
MG/L P
0.007
0.007
0.007
0.009
0.009
0.010
0.003
0.002K
0.002K
0.002K
0.002K
0.002










0.014
0.012
0.013
0.014
0.014
0.020
0.018
0.022
           K  VALUE  KNOWN  TO  BE
           LESS  THAN  INDICATED

-------
STGRET RETRIEVAL DATE 76/0?/li
                                                                  29 33 30.0 100 58 30.0
                                                                  AMISTAD LA..E
                                                                          TEAAS
                                                                  11EFALES
                                                                  4
 2111202
0130 FEET
                                                                                                 DEPTH
DATE
FROM
TO
74/03/05





74/05/14





74/08/07


74/10/29









00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
14
14
14
14
14
14
15
15
15
15
15
15
17
17
17
13
13
13
13
13
13
13
13
13
13
35
35
35
35
35
35
45
45
45
45
45
45
45
45
45
30
30
30
30
30
30
30
30
30
30
0000
0010
0030
0060
0090
0124
0000
0005
0020
0035
0060
0115
0000
0003
0029
0000
0001
0005
0009
0020
0040
0060
0080
0090
0129
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0



0

0

0
0
0
0
0
0
.007
.009
.007
.008
.011
.012
.010
.008
.008
.008
.010
.015



.014

.020

.013
.014
.013
.016
.020
.025
UG/L PERCENT
0.2





2.2


1.0


2.8
50.0
1.0
2.0
50.0

1.0







-------
STORET KETKIEVAL OATtl 76/C2/1!
  DATE   TIME DEPTH
  FROM    OF
   TO    DAY  FEET
74/03/06 14
         14
         14
         14
         14
74/05/15 10
         10
         10
         10
         10
74/08/06 14
         14
         14
         14
         14
         14
         14
         14
         14
         14
74/10/29 15
         15
         15
         15
         15
         15
         15
         15
         15
         15
50 0000
50 0010
50 0035
50 0070
50 0130
55 0000
55 0005
55 0040
55 0065
55 0130
50 0000
50 0005
50 0015
50 0042
50 0055
50 0070
50 0085
50 0110
50 0140
50 0170
15 0000
15 0005
15 0020
15 0040
15 0060
15 0080
15 0105
15 0120
15 0135
15 0176
 00010
WATER
 TEMP
 CENT

   16.0
   15.0
   13.3
   12.5
   12.4
   25.2
   25.1
   23.4
   19.7
   14.2
   27.5
   27.2
   26.9
   26.8
   26.7
   22.2
   16.7
   15.1
   14.6
   14.5
   21.3
   21.3
   21.2
   21.0
   21.0
   21.0
   21.5
   19.7
   17.2
   16.7
430103
29 30 50.0 101
AM1STAO Lfcrvt
t8465 TEXAb
11EPALES

00300
DO

MG/L

9.2
9.4
9.2
8.8

7.8
7.4
5.6
5.6
7.4
7.6
7.0
7.0
7.0
1.6
1.0
1.4
1.6
i-.e
7.8
7.8
7.8
7.2
7.8
6.4
2.8
2.8
0.8
0.4

00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICKOMHO
180 709
685
694
701
717
120 918
918
903
884
770
180 1028
1018
1017
1014
1014
936
825
804
797
799
100 710
710
709
702
702
699
1745
1439
860
779
4
00400
PH

su
8.20
8.20
8.20
8.15
8.10
8.25
8.20
8.10
7.80
7.70
8.50
8.50
8.40
8.40
8.30
7.90
7.80
7.75
7.70
7.70
8.07
8.07
8.04
7.95
7.92
7.88
7.42
7.41
7.44
7.46

00410
T ALK
CAC03
MG/L
141
137
140
140
141
127
127
126
135
137










113
111
112
111
109
111
145
146
143
145
10 15.0
2111202
QUO
00610
NH3-N
TOTAL
MG/L
0.040
0.020
0.020
0.040
0.050
0.040
0.040
0.040
0.060
0.050










0.040
0.020K
0.020K
0.020
0.020
0.020
0.020K
0.020K
0.030
0.040
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.300
0.300
0.300
0.200
0.300
0.300
0.300
0.300
0.300
0.200







.


0.500
0.200
0.200
0.200
0.200
0.200K
0.300
0.300
0.300
0.200
00630
N02«.N03
N-TOTAL
MG/L
0.210
0.220
0.240
0.300
0.330
0.210
0.220
0.220
0.370
0.390










0.490
0.490
0.500
0.530
0.530
0.560
0.730
0.690
0.540
0.290
00671
PnOS-DIS
OHTHO
MG/L P
0.009
0.009
0.006
0.010
0.010
0.002K
0.003
0.004
0.003
0.003










0.013
0.012
0.012
0.011
0.012
0.013
0.016
0.017
0.017
0.016
          K VALUE KNOWN TO BE
          LESS THAN INDICATED

-------
STOSET RETRILVAu DATE ?
                                                                  480103
                                                                  29  30 50.0  101
                                                                  AMtSTAD LA,-£
                                                                  46465   TEXAS
                                                  10 15.0
                                                                                       2111202
                                                                                      0140  FEET
                                                                  DEPTH
                      00665
  DATE   TIME DEPTH PHOS-TOT
  FROM    OF
   TO    DAY  FEET   MG/L P
74/03/06




74/05/15




74/08/06


74/10/29











14
14
14
14
14
10
10
10
10
10
14
14
14
15
15
15
15
15
15
15
15
15
15
15
15
50
50
50
50
50
55
55
55
55
55
50
50
50
15
15
15
15
15
15
15
15
15
15
15
15
0000
0010
0035
0070
0130
0000
0005
0040
0065
0130
0000
0003
0042
0000
0001
0005
0020
0021
0040
0060
0080
0105
0120
0135
0176
0
0
0
0
0
0
0
0
0
0



0

0
0

0
0
0
0
0
0
0
.006
.006
.006
.006
.008
.008
.013
.008
.008
.007



.014

.014
.014

.013
.023
.013
.018
.020
.018
.016
  32217
CHLSPHYL
   A
  UG/L

     0.3
                                   1.4




                                   2.8


                                   3.3
  00031
INCOT LT
REMNING
PERCENT
              50.0
               1.0

              50.0


               1.0

-------
STOPET RETRIEVAL OACE 75/02/11
                                                                   430104
                                                                  29  i*l 50.0  101  22  20.0
                                                                  AMISTAD LA'1
                                                                  48465   TtAAS
DATE
FROM
TO
74/03/06





74/05/15




74/08/07




74/10/30





00010
TIME DEPTH WATEK
OF TEMP
DAY FEET
15
15
IS
15
15
15
09
09
09
09
09
13
13
13
13
13
09
09
09
09
09
09
45
45
45
45
45
45
40
40
40
40
40
10
10
10
10
10
05
05
05
05
05
05
0000
0010
0020
0040
0060
0075
0000
0005
0020
0060
0073
0000
0005
0027
0050
0072
0000
0005
0020
0035
0050
0076
CENT
16
14
14
14
13
13
25
25
24
22
20
27
27
27
27
27

21
21
21
20
20

.3
.8
.5
.2
.4
.6
.4
.2
.7
.7
.6
.3
.2
.2
.2
.2

.4
.4
.3
.6
.1
11EPAL.ES

00300
DO

MG/U

9.4
9.6
9.0
7.4
7.8

7.2
6.4
2.8
0.4
6.8
6.8
7.0
7.0
5.2
7.2
7.0
7.0
7.0
5.6
5.4

00077 00094
TRANSP CNOUCTVY
SECCHI FIELD
INCHES MICROMHO
228 850
831
836
868
815
1875
84 960
965
949
905
927
90 1126
1126
1126
1126
1231
36
975
973
963
901
1415
4
00400
PH

su
8.20
8.20
8.20
8.10
7.95
8.00
8.05
8.00
8.00
7.60
7.45
8.40
8.40
8.20
8.40
8.10

7.94
7.92
7.90
7.83
7.71

00410
T ALK
CAC03
MG/L
149
151
155
161
178
159
146
141
142
136
108





145
157
156
157
144
158
211
ooao
00610
NH3-N
TOTAL
MG/L
0.040
0.020
0.040
0.040
0.020
0.040
0.100
0.110
0.100
0.140
0.360





0.040
0.020
0.020
0.020
0.030
0.020
1202


FEET DEPTH
00625
TOT KJEL
N
MG/L
0.300
0.200
0.200
0.200
0.200K
0.200
0.700
0.400
0.500
0.500
0.900





0.400
0.300
0.300
0.300
0.300
0.400
00630
N02&N03
N-TOTAL
MG/L
0.510
0.510
0.560
0.610
0.680
0.630
0.640
0.610
0.620
0.670
0.350





1.680
0.980
0.980
0.960
0.860
0.990
00671
PHOS-OIS
ORTHO
MG/L P
0.010
0.008
0.009
0.009
0.006
0.006
0.003
0.007
0.005
0.004
0.007





0.018
0.019
0.019
0.019
0.020
0.020
       K VALUE KNOWN  TO  BE
       LESS THAN  INDICATED

-------
STORET RETRIEVAL OAfE  ?&/o2/ii .
                                                                   480104
                                                                  29 41 50.0 101 22 20.0
                                                                  AM I ST AO LAf\i_
                                                                  48465   TEAAS
                                                                  11EPALES
                                                                  4
 2111202
0080 FEET  DEPTH
OATE
FROM
TO
74/03/06





74/05/15




74/08/07


74/10/30







00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL 1NCDT LT
OF A REMMNG
DAY FEET
15
15
15
15
15
15
09
09
09
09
09
13
13
13
09
09
09
09
09
09
09
09
45
45
45
45
45
45
40
40
40
40
40
10
10
10
05
05
05
05
05
05
05
05
0000
0010
0020
0040
0060
0075
0000
0005
0020
0060
0073
0000
0002
0027
0000
0001
0005
0008
0020
0035
0050
0076
MG/L P
0,
0,
0,
0.
0,
0.
0,
0,
0,
0,
0,



0,

0.

0,
0.
0,
0.
.008
.012
.013
.010
.006
.013
.Old
.023
.020
.022
.045



.037

.021

.024
.022
.028
.023
UG/L PERCENT
1.5





2.7




4.3
50.0
1.0
1.8
50.0

1.0





-------
STOftET RETRIEVAL DATE 76/0?/ll
                                                                  460105
                                                                 29 37 30.0  101
                                                                 AMISTAD LA"E
                                                                 <»84b5   TEXAS
15 00.0
00010
DATE
FROM
TO
74/05/15




74/08/07








74/10/30







TIME DEPTH
OF
DAY
10
10
10
10
10
14
14
14
14
14
14
14
14
14
08
08
08
08
08
08
08
08


FEET
15
IS
15
15
15
00
00
00
00
00
00
00
00
00
15
15
15
15
15
15
15
15
0000
0005
0035
0075
0130
0000
0005
0015
0038
0055
0070
0085
0110
0140
0000
0005
0015
0030
0050
0080
0110
0139
HATER
TEMP
CENT
25
25
24
18
14
27
27
27
27
26
24
16
15
15
21
21
21
21
21
21
20
20



.3
.3
.3
.7
.8
.1
.0
.0
.0
.9
.8
.6
.3
.0
.3
.3
.3
.3
.3
.3
.9
.6
11EPALES

00300
00

MG/L

8.0
7.4
0.6
5.0
7.8
7.8
7.6
7.4
7.0
1.4
1.2
0.4
0.6
7.2
7.6
7.2
7.2
7.2
6.8
6.0
5.2

00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
132 944
943
927
753
811
126 1035
1034
1032
1031
1029
1130
636
820
821
34 685
684
685
686
694
743
1483
1654
4
00400
PH

su
8.20
8.20
8.20
7.60
7.70
8.60
8.60
8.60
8.50
8.60
7.80
7.90
7.90
7.90
7.91
7.92
7.90
7.89
7.87
7.76
7.72
7.69

00410
T ALK
CAC03
MG/L
124
125
124
121
139









119
117
117
117
117
124
148
147
2111202
0140
00610
NH3-N
TOTAL
MG/L
0.060
0.050
0.060
0.190
0.050









0.020
0.020K
0.020
0.020
0.020K
0.020K
0.040
0.050
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.500
0.300
0.300
0.500
0.200



'





0.300
0.300
0.300
0.300
0.300
0.300
0.400
0.400
00630
N02&N03
N-TOTAL
MG/L
0.230
0.210
0.230
0.360
0.430









0.780
0.790
0.800
0.800
0.810
0.960
1.430
1.630
00671
PHOS-DIS
ORTHO
MG/L P
0.004
0.007
0.006
0.003
0.004









0.013
0.012
0.015
0.015
0.015
0.017
0.018
0.018
         K  VALUE  KNOWN  TO  BE
         LESS  THAN  INDICATED

-------
STO«ET RETRIEVAL DAT£ 70/02/11
                                                                   430105
                                                                  29  37  30.0  101  15  00.0
                                                                  AMISUD  LAKu
                                                                  484t>5    TEXAS
DATE
FROM
TO
74/05/15




7<»/08/07


74/10/30







00665 32217 00031
TIME DEPTH PHOS-TOT CHLPPHYL INCDT LT
OF A REMIMING
DAY FEET
10
10
10
10
10
14
14
14
08
08
08
08
08
08
08
08
IS
15
15
15
15
00
00
00
15
15
15
15
15
15
15
15
0000
0005
0035
0075
0130
0000
0003
0038
0000
0005
0015
0030
0050
0080
0110
0139
MG/L P
0.011
0.012
0.008
0.025
0.011



0.025
0.021
0.019
0.019
0.021
0.021
0.022
0.02S
UG/L PERCENT
1.7

1.0


2.9
50.0
1.0
3.7







                                                                  HEPALES
                                                                  4
 2111202
0140 FEET
                                                                                                 DEPTH

-------
  APPENDIX E
TRIBUTARY DATA

-------
STGRCT HETRIEVAL DATE 76/03/10
  DATE   TIME DEPTH N02
  FROM    OF
   TO    DAY  FEET
74/10/08
74/11/07
74/12/06
75/01/07
75/02/06
75/03/01
75/04/11
75/04/23
75/05/17
75/06/05
75/07/16
75/03/07
19
14
11
15
10
15
11
11
11
13
10
11
50
00
45
45
15
00
30
10
15
20
30
45
                                                                 29 2k 55.0 101 03 25.0 4
                                                                 KIO GRANDE
                                                                 460il   15 DEVILS *IVE*
                                                                 0/6*ISTAJ LAKE
                                                                 TURBINE DISCH AT AMISTAD JAM POWERHOUSE
                                                                 11£PALES             2111204
                                                                  0000 FEET  DEPTH  CLASS 00
0630
oN03
OTAL
IG/L
2.860
0.443
0.552
0.528
0.560
0.625
0.630
0.650
0.630
0.620
0.540
0.450
00625
TOT KJEL
N
MG/L
0.600
1.300
0.500
0.500
0.200
0.300
0.750
l.COO
0.200
1.300
0.400
0.525
00610
NH3-N
TOTAL
MG/L
0.040
0.045
0.024
0.048
0.020
C.025
0.045
0.190
0.015
0.130
0.015
0.010
00671
PHOS-DIS
ORTHO
MG/L P
0.005
0.010
0.010
0.005K
0.020
0.005K
0.005
0.005K
0.005
0.005K
0.010
0.005K
00665
PHOS-TOT

MG/L P
0.010K
0.010
0.022
0.010K
0.020
0.010K

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

-------
STORET RETRIEVAL DATE 7fc/c3/ic
  DATE   TIME DEPTH N02*>N03
  FROM    OF
   TO    DAY  FEET
74/09/07
74/10/08
74/11/07
74/12/06
75/01/07
75/02/06
75/03/01
75/04/11
75/04/23
75/05/17
75/06/05
75/07/16
75/08/07
14 ?0
12 30
14 30
12 30
14 30
11 00
16 00
11 55
11 45
12 20
12 20
11 00
11 00
                                                                  29  46  05.0  101  »1  10.0  4
                                                                  RIO  uRiNUt  RIVER
                                                                  •*<3       15  LANGTHf
                                                                  T/AMISTAO LAKE
                                                                  0.5  MI  S Or  OIPT RD  11.5  MI  Srf  LANGT*r
                                                                  11F.PALES              211120*
                                                                   0000  FEET   DEPTH  CLASS  00
0630
*>N03
OTAL
G/L
0.720
2.030
0.890
0.760
0.720
0.672
0.980
1.000
0.780
0.890
0.710
1.350
0.950
00625
TUT KJEL
N
MG/L
0.400
1.800
0.700
0.800
0.800
0.200
0.650
O.R50
0.300
1.600
1.020

0.450
00610
NH3-N
TOTAL
MG/L
0.080
0.040
0.020
0.024
0.040
0.008
0.015
0.030
0.085
0.041
0.020
0.120
0.005K
00671
PHOS-DIS
ORTHO
MG/L P

0.015
0.015
o.ooe
0.005K
0.008K
0.015
0.010
0.005K
0.020
0.005
0.025
0.035
00665
PHOS-TOT

MG/L P
0.020
1.350
0.210
0.080
0.030
0.020
0.240
0.010
0.050
O.b70
0.010K
0.700
0.165
  K VALUE KNOWN TO BE
  LESS THAN INDICATED

-------
STORET RETRIEVAL OAfiL  76/03/10
                                                                   •4 = 0101
                                                                  29 40 35.0 101 00  10.0  4
                                                                  DEVILS RIVoH
                                                                  «+6    -  15 FEELY
                                                                  T/AMISTAO LAKE
                                                                  t<0880Af*0 XING 10.5
                                                                  11EPALE5
                                                                   0000 FEET  DEPTH
MI £ OF COMSTOCK
  2111204
CLASS 00
DATE
FROM
TO
74/09/07
74/10/08
74/11/07
74/12/06
75/01/07
75/02/06
75/03/01
75/04/11
75/04/23
75/05/17
75/06/05
75/07/16
75/08/07
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
11
13
15
13
15
11
15
13
12
11
11

12
24
00
45
40
30
05
20
00
35
35
50

10
HG/L
1
2
2
2
2
3
2
2
2
2
1
1
2
.500
.640
.320
.400
.400
.000
.300
.200
.200
.100
.950
.880
.000
MG/L
0.
0.
0.
0.
0.
0.
0.
1.
0.
0.
0.
0.
0.
800
200
700
200
300
100K
300
100
250
300
400
700
200
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
025
020
030
008
012
010
040
260
025
035
060
045
010
MG/L
0.
0.
0.
0.
0.
0.
0.
04
0.
0.
0.
0.
0.
p
005K
005K
005
010
005K
005
005K
005
005K
005K
005K
005K
005K
MG/L P
0.005K
0.010K
0.020
0.010
0.010K
0.010K
0.010K
0.010K
0.010
0.010
0.010K
0.010
0.020
    K VALUE KNOWN TO BE
    LESS THAN INDICATED

-------
STORET REtRIEVAL DATE fb/03/10
                                                                  <*t01El
                                                                  2s)  4&  05.0  101  26  JO.O  4
                                                                  PECUS  rfivE
                                                                  43       15  SHOMLA
                                                                  T/AM15TAD LAKE
                                                                  0.3 MI N OF  2NDARY  RD 0.8  M  E  US  90  JCT
                                                                  11EPALES             2111204
                                                                  • 0000  FEET   DEPTH   CLASS 00
  DATE   TIME DEPTH N02*>N03
  FROM    OF
   TO    DAY  FEET
74/09/07
74/10/08
74/11/07
74/12/06
75/01/07
75/02/06
75/03/01
75/04/11
75/04/23
75/05/17
75/06/05
75/07/16
75/08/07
14 50
13 20
15 15
13 10
15 00
11 15
15 00
13 20
12 15
12 00
12 35
11 30
11 20
10630
!<>N03
OTAL
IG/L
0.660
3.300
3.000
3.100
3.120
2.300
2.400
2.100
2.000
2.000
2.000
1.400
1.570
00625
TOT KJEL
N
MG/L
0.600
0.600
0.700
0.400
0.300
0.100K
0.150
0.550
0.450
0.400
1.050
0.400
0.350
00610
NH3-N
TOTAL
MG/L
0.050
0.115
0.030
0.024
0.024
0.016
0.030
0.290
0.148
0.050
0.220
0.045
0.015
00671
PHOS-OIS
ORTMO
MG/L P
0.010
0.005K
0.010
0.010
0.005K
0.008
0.005K
0.005K
0.005K
0.005
0.005K
0.005
0.005K
00665
PHOS-TOT

MG/L f
0.010
0.030
0.020
0.010
0.010K
0.010*
0.010K
0.010K
0.020
0.010K
0.010K
0.010
0.020
  K VALUE KNOWN TO BE
  LESS THAN INDICATED

-------