U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
TWIN OTES RESERVOIR
TOM GREEN COUNTY
TEXAS
EPA REGION VI
WORKING PAPER No, 666
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALL1S, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
699-440
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REPORT
ON
TWIN RJJTES RESERVOIR
TOM GREEN COUNTY
EPA REGION VI
WORKING PAPER No, 666
WITH THE COOPERATION OF THE
TEXAS WATER QUALITY BOARD
AND THE
TEXAS NATIONAL GUARD
MARCH, 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 4
III. Lake Water Quality Summary 5
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)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 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
Lewisville (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
Coll in
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
Still house Hollow
Tawakoni
Texoma
Travis
Trinidad
Twin Buttes
White River
Wh i tney
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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TWIN
BUTTES
RISE
TWIN BUTTES RESERVOIR
Tributary Sampling Site
X Lake Sampling Site
^ Drainage Area Boundary
Land Subject To Inundation
-\r
Hap Location
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TWIN SUITES RESERVOIR
STORET NO. 4837
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Twin Buttes Reservoir is eutrophic;
i.e., well supplied with nutrients and quite productive. Whether
nutrient enrichment is beneficial or deleterious depends on the
actual or potential effect on the uses of the reservoir. In this
regard, no nuisance conditions are known to personnel of the
Texas Water Quality Board and there is little or no impairment of
the designated beneficial uses of this water body.
Twin Buttes Reservoir ranked nineteenth in overall trophic
quality when the 39 Texas reservoirs sampled in 1974 were compared
using a combination of six parameters*. Fifteen of the reservoirs
had less and one had the same median total phosphorus, 11 had less
and six had the same median dissolved phosphorus, 29 had less and
two had the same median inorganic nitrogen, 15 had less mean
chlorophyll a_, and 16 had greater mean Secchi disc transparency.
Marked depression of dissolved oxygen with depth occurred at
sampling stations 1 and 2 in August.
Survey limnologists did not observe macrophytes or surface
concentrations of algae in the reservoir.
See Appendix A.
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B. Rate-Limiting Nutrient:
The results of the algal assay indicate Twin Buttes Reservoir
was phosphorus limited at the time the sample was taken (03/04/74).
The reservoir data indicate phosphorus limitation in March and
May but nitrogen limitation in October.
C. Nutrient Controllability:
1. Point sources—No known municipal or industrial point
sources impacted Twin Buttes Reservoir during the sampling year.
There are no lakeshore septic tanks because construction of
shoreline dwellings is prohibited*.
Based on the reservoir morphometry at the conservation-pool
level, the present phosphorus loading of 0.04 g/m2/yr is a little
less than that proposed by Vollenweider (Vollenweider and Dillon,
1974) as an oligotrophic loading (see page 14). However, records
for water year 1975 (October 1, 1974, through September 30, 1975)
show that the mean reservoir content was less than the conservation
pool capacity**. Therefore, the actual areal loading could have
been greater than the indicated 0.04 g/m2.
2. Non-point sources—The entire phosphorus input to Twin
Buttes Reservoir was contributed by non-point sources during the
sampling year. The Middle Concho River contributed 10.3% of the
total; the South Concho River, 18.7%; and Spring Creek added 16.5%.
The minor tributaries and immediate drainage contributed an esti-
mated 13.2%.
*Koederitze, 1976.
** Anonymous, 1976.
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The phosphorus export rates of the three tributaries were
less than 1 kg/km2/yr (see page 13) and compare well with the
rate of the North Concho River, a tributary of nearby 0. C.
Fisher Reservoir* (also less than 1 kg/km2/yr).
* Working Paper No. 656.
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II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphometry (at conservation-pool level) :
1. Surface area: 36.50 kilometers2.
2. Mean depth: 6.3 meters.
3. Maximum depth: >13.1 meters.
4. Volume: 229.676 x 106 m3.
5. Mean hydraulic retention time: 14.9 years (based on outflow)
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Middle Coneho River 3,576.8 0.205
South Concho River 922.0 0.420
Spring Creek 1,025.6 0.324
Minor tributaries &
immediate drainage - 1,033.2 0.296
Totals 6,557.6 1.245
2. Outlet -
Middle Concho River 6,594.1** 0.489**
C. Precipitation***:
1. Year of sampling: 63.8 centimeters.
2. Mean annual: 44.5 centimeters.
t Table of metric conversions—Appendix B.
tt Anonymous, 1975.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of reservoir; lesser outflow due to evaporation (Yost, 1976),
*** See Working Paper No. 175.
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III. WATER QUALITY SUMMARY
Twin Buttes 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 three
stations on the reservoir (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 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 13.1 meters at station 1, 12.8 meters at station 2, and 7.3 meters
at station 3.
The sampling results are presented in full in Appendix D and are
summarized in the following table (the August nutrient samples were not
preserved properly and were not analyzed).
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PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNDCTVY
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)
1NORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (Uf,/L)
SECCHI (METEWS)
A. SUMMARY OF PHYSICAL AND
1ST SAMPLING ( 3/ 4/74)
3 SITES
CHEMICAL CHARACTERISTICS FOR TWIN BUTTES RESERVOIR
STORET CODE 4837
rtANGE
11.2 - 15.6
8.0 - 10.2
512* - 578.
8.? - .8.4
159. - 203.
0.014 - 0.033
0.007 - 0.011
0.030 - 0.750
0.020 - 0.050
0.400 - 0.700
0*050 - o.eoo
0.540 - 1*250
3.2 - 6.4
0.6 - 1.2
MEAN
13.8
9.3
549.
8.3
175.
0.020
0.009
0.259
0*033
0*508
0.292
0.767
5.1
1.0
MEDIAN
13.3
9.5
538.
8.3
163.
0.017
0.009
0.040
0.030
0.500
0.080
0.630
5.8
1.0
2ND SAMPLING ( 5/15/74)
3 SITES
MEAN MEDIAN
24.5 24.5
7.2
751.
8.3
163.
0.020 - 0.330
0.020 - 0.110
0.400 - 0.900
0.040 - O.tlO
0.420 - 1.200
7.5
742.
8.3
158.
RANGE
22.4 - 25.8
4.8 - 8.0
720. - 790.
8.0 - 8.3
155. - 179.
0.022 - 0.051 0.034 0.029
0.002 - 0.010 0.006 0.006
0.131 0.070
0.060 0.060
0.573 0.500
0.191 0.120
0.704 0*660
3RD SAMPLING ( 8/ 5/74)
3 SITES
RANGE
25.0 - 25.8
0.2 - 6.0
806. - 850.
7.8 - 8.2
MEAN MEDIAN
25.4 25.5
4.2 4.8
821. 810.
8.0 8.0
4.6 -
0.6 -
8.0
1.5
6.8
1.3
7.7
1.5
»0000« -OOOOOOOOOOOOOOttOOOOOOO
oooooa -oooooooooooooooooooooo
oooooo -OOOOOOOQOOOOOOOOOOOOOO
oooooo -oooooooooooooooooooooo
OOOOOO -0000000000000000000000
ooeooo -oooooooooooooooooooooo
OOOOOO -OOOOOOOOOOOOOOOOOOOOOO
000000 -OOOOOOOOOOOOOQOOOOOOOO
12.4 - 16.2 14.1 13.7
0.5 - 1.6 1.3 1.5
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A. SUMMARY OF PHYSICAL AND CHEMICAL CHARACTERISTICS FOH TWIN dUTTES RESEHVOIR
ST03ET CODE 4837
4TH SAMPLING (10/29/74)
PARAMETER
TEMP
OISS OXY (MG/L)
CNOCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/D
TOT P (MG/L»
ORTHO P (MG/L)
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N
TOTAL N (MG/L)
CHLRPYL A (UG/L)
SECCH1 (METERS)
RANGE
17.3 -
3.2 -
272. - 410.
7.6 -
102. - 164.
0.037 - 0.082
0.023 - 0.054
0.210 - 0.290
0.020 - 0.140
0.400 - 0.600
0.240 - 0.430
0.660 - 0.870
7.2 -
0.9 -
3 SITES
MEAN
7
2
•
9
' •
2
4
0
0
0
0
0
3
2
18.4
5.7
380.
7.8
135.
0.051
0.030
0.250
0.062
0.523
0.312
0.773
8.8
1.1
MEDIAN
18.5
5.8
392.
7.7
124.
0.046
0.020
0.260
0.040
O.bOO
0.280
0.770
8.U
1.2
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8
B. Biological characteristics:
1. Phytoplankton -
Sampli ng
Date
03/04/74
05/15/74
08/05/74
10/29/74
Dominant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Scenedesmus sp.
Synedra sp.
Ankistrodesmus sp.
Oocystis sp.
Chrysophytan cells
Other genera
Total
Scenedesmus sp.
Chroomonas sp.
Ankistrodesmus sp.
Raphidiopsis sp.
Pediastrum sp.
Other genera
Total
Raphidiopsis sp.
Flagellates
Synedra sp.
Merismopedia sp.
Carteria sp.
Other genera
Total
Cryptomonas sp.
Chroococcus sp.
Centric diatoms
Ankistrodesmus sp.
Dactylococcopsis sp.
Other genera
Algal Units
per ml
1,650
1,317
809
324
194
1,403
5,697
1,594
1,593
474
271
237
848
5,017
13,554
1,055
586
469
430
2,147
18,241
877
821
396
283
255
481
Total
3,113
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2. Chlorophyll a_ -
Sampling
Date
03/04/74
05/15/74
08/05/74
10/29/74
Station
Number
1
2
3
1
2
3
1
2
3
1
2
3
Chlorophyll a
(yg/1)
6.4
5.8
3.2
4.6
7.7
8.0
13.7
12.4
16.2
8.0
7.2
11.3
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P
Cone, (mg/1)
Inorganic N
Cone, (mg/1)
Maximum yield
(mg/1-dry wt.)
<0.005
<0.055
<0.055
<0.005
0.290
0.290
1.290
1.290
0.1
6.4
14.9
0.1
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential primary productivity
of Twin Buttes Reservoir was low at the time the sample was
collected (03/04/74). No significant growth response occurred
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10
when only nitrogen was added, but there was an increase in
yield when only phosphorus was added. These results indicate
the reservoir was phosphorus limited at that time.
The reservoir data indicate phosphorus limitation in March
and May but nitrogen limitation in October. The mean inor-
ganic nitrogen to orthophosphorus ratios at those times were
32 to 1, 32 to 1, and 10 to 1, respectively.
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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 months of April and May 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*. 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 A-2, B-2, and D-l and multiplying the means by the ZZ area in
km2.
No known wastewater treatment facilities impacted Twin Buttes
Reservoir during the sampling 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) -
Middle Concho River 160 10.3
South Concho River 290 18.7
Spring Creek 255 16.5
b. Minor tributaries & immediate
drainage (non-point load) - 205 13.2
c. Known municipal STP's - None
d. Septic tanks - None
e. Known industrial - None
f. Direct precipitation* - 640 41.3
Total 1,550 100.0
2. Outputs -
Lake outlet - Middle Concho River 625
3. Net annual P accumulation - 925 kg.
* See Working Paper No. 175.
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13
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
Source
a. Tributaries (non-point load) -
Middle Concho River
South Concho River
Spring Creek
kg N/
yr
10,220
15,455
29,245
b. Minor tributaries & immediate
drainage (non-point load) - 16,875
c. Known municipal STP's - None
d. Septic tanks - None
e. Known industrial - None
f. Direct precipitation* - 39,405
Total 111,200
2. Outputs -
Lake outlet - Middle Concho River 16,470
3. Net annual N accumulation - 94,730 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr
Middle Concho River
South Concho River
Spring Creek
0.3
0.2
E. Mean Nutrient Concentrations in Ungaged Stream:
Tributary
Dove Creek
Mean Total P
(Cone, (mg/1)
0.016
% of
total
9.2
13.9
26.3
15.2
35.4
100.0
kg N/km2/yr
3
17
29
Mean Total N
Cone, (mg/1)
3.357
* See Working Paper No. 175.
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14
F. 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 0.04 0.03 3.0 2.6
Vollenweider phosphorus loadings
(9/m2/yr) based on mean depth and mean
hydraulic retention time of Twin Buttes Reservoir at conservation-
pool level:
"Dangerous" (eutrophic loading) 0.12
"Permissible" (oligotrophic loading) 0.06
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15
V. LITERATURE REVIEWED
Anonymous, 1975. Water resources data for Texas: Part 1. Surface
water records. U.S. Geol. Surv., Austin.
Anonymous, 1976. Water resources data for Texas, water year 1975.
Water Data Rept. TX-75-1, vol. 3, U.S. Geol. Surv., Austin.
Koederitze, Thomas (Supt.) 1976. Personal communication (lakeshore
development). Water Department, San Angelo.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Natl. Res. Council of Canada Pub!. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
Yost, I. D., 1976. Personal communication (estimate of evaporation
from central Texas lakes). U.S. Geol. Surv., Austin.
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VI. APPENDICES
16
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO PE USED IN RANKINGS
LAKE
CODE LAKE NAME
4801 AMISTAD LAKE
4802 BASTROP LAKE
4803 BELTON RESERVOIR
4804 BRAUNIG LAKE
4805 BROWNWOOO LAKE
4806 LAKE BUCHANAN
4807 CAODO LAKE
4808 CALAVERAS LAKE
4809 CANYON RESERVOIR
4810 LAKE COLORADO CITY
4811 CORPUS CRISTI LAKE
4812 DIVERSION LAKE
4813 EAGLE MOUNTAIN LAKE
4fll4 FT PHANTOM HILL LAKE
4815 GARZA LITTLE ELM RESEHVO
4816 KEMP LAKE
4817 HOUSTON LAKE
4818 LAKE OF THE PINES
4819 LAVON RESERVOIR
4820 LIVINGSTON LAKE
4821 LYNDON B 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
0.013
0.02?
0.016
0.134
0.027
0.036
0.055
0.038
0.010
0.042
0.113
0.025
0.024
0.060
0.045
0.023
0.097
0.031
0.063
0.196
0.042
0.010
0.021
0.031
0.023
0.098
0.029
0.036
MEDIAN
INORG N
0.500
0.090
0.185
0.150
0.100
0.250
0.070
0.060
0.450
0.090
0.130
0.080
0.070
0.105
0.380
0.110
0.260
0.090
0.180
0.555
0.420
0.600
0.070
0.180
0.070
0.140
0.150
0.080
500-
MEAN SEC
371.474
419.917
378.312
461.625
470.375
437.625
463.333
461.667
384.812
473.625
475.187
470.111
469.625
474.909
475.782
455.000
486.187
440.000
485.333
465.469
456.500
403.562
439.312
442.625
419.045
481.000
439.458
462.583
MEAN
CHLORA
2.042
12.392
8.025
22.762
4.887
8.606
14.808
22.500
2.500
12.675
19.756
15.867
5.662
6.317
14.156
10.217
16.650
12.919
5.400
16.112
8.100
12.944
3.037
10.619
9.495
24.675
6,267
11.775
15-
MIN DO
14.900
15.000
15.000
14.800
14.400
15.000
11.400
13.000
14.800
10.200
14.000
9.000
11.000
9. BOO
14.600
10.400
12.400
15.000
8.800
15.000
14.900
15.000
14.VOO
. 14.800
15.000
10.200
15.000
15.000
MEDIAN
DISS OWTHO P
0.009
0.007
0.007
0.062
0.007
0.012
0.013
0.007
0.006
0.012
0.050
0.009
0.008
0.022
0.018
0.007
0.036
0.011
0.018
0.128
0.013
0.004
0.009
0.010
0.009
0.011
0.009
0.008
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
4829 SOMERVILLE LAKE
4830 STAMFORD LAKE
4831 STILLHOUSE HOLLOW RESEKV
4832 TAWAKONI LAKE
4833 TEXARKANA LAKE
4834 TEXOMA LAKE
4835 TRAVIS LAKE
4836 TRINIDAD
4837 TWIN 8UTTES RESERVOIR
4838 WHITE RIVER RESERVOIR
4839 WHITNEY LAKE
MEDIAN
TOTAL P
0.053
0.073
O.Olb
0.046
0.106
0.042
0.018
0.389
0.029
0.020
0.028
MEDIAN
1NORG N
0.115
0.060
0.160
0.100
0.120
0.160
0.250
0.110
0.250
0.110
0.120
500-
MEAN SEC
473.633
482.714
406.250
466.417
47U.SOO
451.321
389.913
479.500
454.917
434.500
430.500
MEAN
CHLORA
24.491
18.457
3.917
18.246
19.119
12.493
5.595
24.300
8.708
4.333
6.912
15-
MIN DO
13.000
10.600
15.000
13.200
12.400
15.000
15.000
10.000
14.800
15.000
15.000
MEDIAN
DISS OriTHO P
0.013
0.012
0.010
0.013
0.030
0.018
0.007
0.240
0.009
0.009
0.008
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HlGKEK VALUES)
LAKE
CODE LAKE NAME
4801 AMISTAD LAKE
4B02 HASTROP LAKE
4803 8ELTON RESERVOIR
4804 BRAUNIG LAKE
4805 BROrfNUOOD LAKE
4806 LAKE BUCHANAN
4807 CADOO LAKE
4808 CALAVERAS LAKE
4809 CANYON RESERVOIR
4810 LAKE COLORADO CITY
4811 CORPUS CRIST I LAKE
4813 DIVERSION LAKE
4813 EAGLE MOUNTAIN LAKE
4814 FT PHANTOM HILL LAKE
4815 GARZA LITTLE ELM RESERVO
4816 KEMP LAKE
481? HOUSTON LAKE
4818 LAKE OF THE PINES
4819 LAVON RESERVOIR
4820 LIVINGSTON LAKE
4821 LYNDON B JOHNSON LAKE
4822 MEDINA LAKE
4623 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)
( 25)
( 18)
( 10)
< 17)
( 37)
( 14)
( 3)
< 26)
( 27)
( 9)
( 13)
( 29)
( 6)
( 20)
( 8)
( D
( 14)
( 37)
( 3D
( 20)
( 28)
( 5)
( 22)
( 19)
MEDIAN
INORG 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)
( 38)
( 3)
( 28)
( 18)
( 31)
( 33)
( 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)
( ID
( 28)
( 16)
( 18)
( 36)
( 10)
( 7)
( 12)
( 13)
( 8)
( 6)
( 21)
( 0)
< 25)
( 1)
t 15)
( 20)
( 34)
( 27)
( 24)
( 32)
( 3)
( 26)
( 17)
MEAN
CHLOHA
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 t
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)
15-
MIN UO
39
17
17
49
58
17
76
67
49
88
61
97
79
95
55
84
72
17
100
17
39
17
39
49
17
88
17
17
( 14)
( 0)
( 0)
( 17)
( 22)
( 0)
( 29)
( 25)
( 17)
( 33)
( 23)
< 37)
( 30)
< 36)
( 21)
( 32)
( 27)
( 0)
( 38)
( 0)
( 14)
( 0.)
( 14)
( 17)
( 0)
( 33)
( 0)
( 0)
MEDIAN
DISS OHTHO P
63
92
84
5
84
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)
( D
( 10)
( 38)
( 21)
< 19)
< 21)
( 17)
( 2D
( 28)
INDEX
NO
402
393
3U4
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 or LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES*
LAKE
CODE LAKE NAME
4829 SOMERVILLE LAKE
4830 STAMFORD LAKE
4831 STILLHOUSE HOLLOW RESEKV
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 SEC
24
5
87
37
13
61
92
11
58
76
79
( 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 DO
67
82
17
63
72
17
17
92
49
17
17
( 25)
( 31)
( 0)
( 24)
( 27)
( 0)
( 0)
( 35)
( 17)
( 0)
( 0)
MEDIAN
DISS OUTHO P
30 (
39 (
51 (
30 (
13 <
21 (
84 (
0 (
63 (
63 (
76 (
10)
14)
19)
10)
5)
7)
31)
0)
21)
21)
28)
INDEX
NO
200
259
372
253
176
217
384
169
311
390
357
-------
LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
1 4809 CANYON RESERVOIR 445
2 4823 LAKE MEREDITH 441
3 4813 EAGLE MOUNTAIN LAKE 430
4 4816 KEMP LAKE 423
5 4801 AMISTAO LAKE 402
6 4805 BROrfNWOOD LAKE 394
7 4802 BASTROP LAKE 393
8 4838 WHITE RIVER RESERVOIR 390
9 4825 POSSUM KINGDOM RESERVOIR 387
10 4835 TRAVIS LAKE 384
11 4803 BELTON 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 CADDO 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 TAWAKONI LAKE 253
-------
LAKES RANKED Br INDEX NOS.
RANK LAKE CODE LAKE NAME IN0EX NO
29 4821 LYNDON B JOHNSON LAKE 238
30 4834 TEXOMA LAKE 217
31 4829 SOMERVILLE 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 4B04 8RAUNIG LAKE 159
37 4811 CORPUS CRISTI 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
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR TEXAS
06/10/76
LAKE CODE 4837
TWIN BUTTES RES.
TOTAL
TRIBUTARY
4837A1
4837A2
483782
483701
4837ZZ
DRAINAGE AREA OF LAKE(SQ KM)
SUB-DRAINAGE
AREAtSO KM)
6594.1
1576.8
922.0
1025.6
1069.7
6594.1
NORMALIZED FLOWS (CMS)
JAN
0.481
0.040
0.31
0.099
0.159
FEB
0.481
0.042
0.26
0.119
0.156
MAR
0.538
0.051
0.28
0.105
0.150
APR
0.340
0.272
0.34
0.311
0.283
MAY
0.283
0.793
0.57
0.283
0.396
JUN
0.850
0.040
0.76
0.136
0.340
JUL
0.793
0.011
0.19
0.008
0.079
AUG
0.096
0.164
0.57
2.180
0.991
SEP
0.023
0.793
0.79
0.261
0.481
OCT
0.538
0.147
0.31
0.130
0.181
NOV
0.793
0.057
0.31
0.113
0.164
UEC
0.651
0.042
0.31
0.102
0.161
MEAN
0.489
0.205
0.42
0.324
0.296
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 6594.1
SUM OF SUB-DRAINAGE AREAS = 6594.1
TOTAL FLOW IN = 14.88
TOTAL FLOW OUT * 5.87
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR
4837A1
4837A2
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
MEAN FLOW DAY
FLOW DAY
FLOW DAY
FLOW
0.207
6.626
9.968
8.014
6.258
7.023
3.398
1.557
14.158
2.832
1.416
1.699
33.414
10.379
3.087
1.671
1.246
1.104
0.793
0.566
1.529
0.311
0.159
0.218
7
5
2
7
4
1
2
6
4
22
20
3
7
5
2
7
4
1
2
6
4
22
20
3
1.359
0.0
56.634
56.634
36.812
19.822
2.888
2.322
3.171
3.398
2.322
1.614
0.011
2.124
4.191
1.812
1.416
1.048
1.019
0.651
0.425
0.210
0.201
0.122
20
25
20
25
1.133
0.878
0.510
0.850
-------
TRIBUTARY FLOW INFORMATION FOR TEXAS
06/10/T6
LAKE CODE 4837
TWIN BUTTES RES.
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR
4837B2
483701
4837ZZ
9
10
11
12
\
2
3
4
5
6
7
8
9
10
11
12
1
2
3
it
5
6
7
8
9
10
11
12
1
2
3
u
S
6
7
e
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
MEAN FLOW DAY
2.747
6.596
4.389
3.625
2.973
2.718
2.350
2.039
2.039
1.557
1.331
1.246
3.568
5.607
1.642
1.331
1.019
1.076
0.906
0.878
4.332
0.736
0.595
0.368
4.248
2.832
0.850
1.416
1.133
1.133
0.2?7
0. 170
0.481
0.425
0.340
0.283
7
5
2
7
4
1
2
6
4
22
20
3
7
5
2
7
4
1
2
6
4
20
3
0.680
0.510
20
25
FLOW DAY
1.359
2.435
4.332
3.823
3.200
2.832
2.549
2.010
2.039
1.501
1.416
1.246
0.023
0.708
1.586
1.501
0.991
1.133
1.019
0.821
0.595
FLOW DAY
FLOW
1.869
1.926
20
25
0.934
1.104
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/02/11
483701
31 22 25.0 100 32 35.0
TWIN BUTTES RESERVOIR
TEXAS
IIE^ALES 2111202
4 0038 FEET DEPTH
DATE
FROM
TO
74/03/04
74/05/15
74/08/05
74/10/29
TIME
OF
DAY
15
15
15
15
15
15
15
15
11
11
11
11
10
10
10
10
10
30
30
30
30
20
20
20
20
30
30
30
30
05
05
05
05
05
DEPTH
FEET
0000
0005
0015
0033
0000
0005
0015
0030
0000
0005
0015
0031
0000
0005
0020
0035
0043
00010
WATER
TEMP
CENT
15.6
15.6
12.9
12.6
25.0
24.6
2t.5
24.0
25.8
25.8
25.8
25.4
16. 7
18.7
18.7
18.5
17.3
00665
DATE
FKOM
TO
74/03/04
74/05/15
74/08/05
74/10/29
TIME
OF
DAY
15
15
15
15
15
15
15
15
11
11
10
10
10
10
10
10
10
30
30
30
30
20
20
20
20
39
30
05
05
05
05
05
05
05
DEPTH
FEET
0000
0005
0015
0033
0000
0005
0015
0030
0000
0014
0000
0001
0005
0006
0020
0035
0043
PHOS-TOT
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0
0
.017
.017
.016
.021
.022
.025
.025
.029
.053
.043
.043
.046
.082
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICSOMHO
40
1C. 2
9.6
9.
7.
8.
7.
4.
5.
4.
0.
6.
5.
5.
3.
4.
32217
6
60
8
0
4
8 60
4
8
2
2 *6
8
4
2
6
00031
570
572
535
530
748
74<»
742
733
811
810
810
824
391
391
389
370
272
00400 00410 00610 00625 00630 00671
PH T ALK NH3-N TOT KJEL N02*>N03 PHOS-OIS
CAC03 TOTAL N N-TOTAL ORTHO
SU MG/L MG/L MG/L MG/L MG/L P
8.
8.
8.
8.
8.
8.
8.
8.
8.
8.
8.
7.
7.
7.
7.
7.
7.
40
3C
20
20
30
30
30
30
15
05
05
80
72
73
72
71
65
162 0.040 0.700 0.040 0.009
1S9 0.020 0.600 0.030 0.009
160 0.030 0.500 0.040 0.008
163 0.030 0.500 0.040 0.009
156 0.060 0.600 0.060 0.006
156 0.0<*0 0.500 0.060 0.005
155 0.020 0.400 0.030 0.002
156 0.050 0.500 0.050 0.006
121 0.0^0 0.600 0.21U 0.027
121 0.030 0.500 0.210 0.024
123 0.040 0.500 0.210 0.023
119 0.050 0.400 0.260 0.032
102 0.140 0.500 0.290 0.054
CHLRPHYL INCDT LT
A
UG/L
6.
4.
13.
8.
REMNING
PERCENT
4
6
1.0
7
1.0
0
50.0
1.0
-------
SrORET RETRIEVAL GATE 76/02/11
483702
31 21 28.0 100 32 10.0
TWIN 8UTTES RESERVOIR
TEXAS
DATE
FROM
TO
74/03/04
74/05/15
74/08/05
74/10/29
DATE
FROM
TO
74/03/04
74/05/15
7^/08/05
74/10/29
TIME DEPTH
OF
DAY FEET
16 05 0000
16 05 0005
16 05 0015
16 05 0025
16 05 0042
15 00 0000
15 00 0005
15 00 0015
15 00 0037
17 00 0000
17 00 0005
17 00 0015
17 00 0035
10 40 0000
10 40 0005
10 40 0015
10 40 0020
TIME DEPTH
OF
OAY FEET
16 05 0000
16 OS 0005
16 05 0015
16 05 0025
16 05 0042
15 00 0000
15 00 0005
15 00 0015
15 00 0017
15 00 0037
17 00 0000
10 40 0000
10 40 0001
10 40 0005
10 40 OOOb
10 40 0015
10 40 0020
00010
WATER
TEMP
CENT
13.3
13.2
12.5
12.5
11.2
24.5
24.4
24.0
22.4
25.5
25.5
25.5
25.2
18.7
18.7
18.5
18.5
00665
PHOS-TOT
MG/L P
0.018
0.016
0.014
0.014
0.016
O.C2S
0.028
0.029
0.051
0.043
0.038
0.037
0.04b
00300
DO
MG/L
10.
9.
9.
9.
8.
7.
4.
4.
4.
4.
2.
6.
5.
5.
5.
32217
00077 00094
TRANSP CNDUCTVY
SECCH1 FIELD
INCHES MICROMHO
48
0
6
4
0
60
0
6
8
0 72
2
2
0
2 46
8
6
8
00031
538
536
529
522
512
742
740
737
720
808
808
808
806
393
392
392
392
lltPALES
4
00400 00410
PH T ALK
CAC03
SU
8.30
8.20
8.20
8.20
a. 20
8.30
8.30
8.30
8.00
8.00
8.00
7.95
7.80
7.71
7.70
7.69
7.69
MG/L
171
162
163
164
162
158
158
159
159
124
124
128
134
2111202
0047 FEET DEPTH
00610 00625 00630 00671
NH3-N TOT KJEL N02(kN03 PHOS-OIS
TOTAL N N-TOTAL ORTHO
MG/L
0.040
0.030
0.030
0.030
0.040
0.060
0.050
0.050
0.110
0.030
0.020
0.030
0.020
MG/L
0.600
0.500
0.500
0.500
0.500
0.800
0.500
0.500
0.600
0.600
0.500
0.500
0.500
MG/L
0.040
0.040
0.060
0.060
0.040
0.090
0.060
0.070
0.080
0.250
0.240
0.240
0.260
MG/L P
0.008
0.009
0.007
0.008
0.008
0.006
0.007
0.006
0.010
0.028
0.026
0.023
0.029
CHLRPHYL INCDT LT
A
UG/L
5.
7.
12.
7.
REMNING
PERCENT
8
7
1.0
4
2
50.0
1.0
-------
STORE! SETRiEVAL DATE 76/02/11
483703
31 17 32.0 100 30 00.0
TrflN BUTTES RESERVOIR
48451 TEXAS
DATE
FROM
TO
74/03/05
74/05/15
74/08/05
74/10/29
DATE
FROM
TO
74/03/05
74/05/15
74/08/05
74/10/29
TIME DEPTH
OF
DAY FEET
10 45 0000
10 45 0005
10 45 0015
10 45 0020
14 35 0000
14 35 0005
14 35 0017
10 30 0000
10 30 0005
10 30 0018
11 00 0000
11 00 0005
11 00 0015
11 00 0024
TIME DEPTH
OF
DAY FEET
10 45 0000
10 45 0005
10 45 0015
10 45 0020
14 35 0000
14 35 0005
14 35 0017
10 30 0000
10 30 0006
1 00 0000
1 00 0001
1 00 0005
1 00 0006
1 00 0015
1 00 0024
00010
WATER
TEMP
CENT
15.3
15.2
14.8
14.7
25.8
25.7
24.7
25.2
25.2
25.0
18.5
18.2
18.0
17.8
00665
PHOS-TOT
MG/L P
0.024
0.023
0.025
0.033
0.045
0.043
0.051
0.063
0.061
0.054
0.061
00300
DO
MG/L
8.8
8.4
8.0
7.4
7.0
6.0
5.6
5.2
7.2
7.2
6.2
5.4
32217
CHLRPHYL
A
UG/L
3.2
ft.O
16.2
11.3
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
25 578
578
570
571
30 790
789
775
18 850
850
850
36 410
407
402
345
00031
INCDT LT
REMNING
PERCENT
1.0
1.0
50.0
1.0
11EPALES
4
00400 00410
PH T ALK
SU
8.
8.
8.
8.
8.
8.
8.
8.
8.
8.
7.
7.
7.
7.
30
30
30
30
25
25
20
20
10
05
94
92
84
76
CAC03
MG/L
203
202
202
203
178
178
179
164
164
164
161
2111202
0025 FEET DEPTH
00610 00625 00630
NH3-N TOT KJEL N02&N03
TOTAL
MG/L
0.040
0.020
0.030
0.050
0.060
0.080
0.080
0.080
0.090
0.100
0.130
N
MG/L
0.400
0.400
0.400
0.500
0.900
0.500
0.500
0.600
0.500
0.500
0.600
N-TOTAL
MCi/L
0.740
0.740
0.750
0.750
0.300
0.330
0.320
0.270
0.270
0.270
0.270
00671
PHOS-DIS
ORTHO
MG/L P
0.011
0.008
0.009
0.011
0.005
0.006
0.004
0.027
0.028
0.028
0.035
-------
APPENDIX E
TRIBUTARY DATA
-------
STORET RETRIEVAL DATE 76/03/10
4837A1
31 22 00.0 100 31 20.0 4
MIDDLE ^ONCHO RIVER
48213 TOM GREEN CO MAP
o/TtfiN BUTTES RESERVOIR
2NDRY RD XING 1 MI Nw JCT 2NORY RD 584
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/07
74/11/02
74/12/07
75/01/04
75/02/01
75/03/02
75/04/06
75/05/04
75/05/25
75/06/22
75/07/20
75/08/03
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12
10
11
11
11
14
16
IS
16
14
16
00
00
45
20
00
00
15
45
00
00
30 '
MG/L
0
0
0
0
0
0
0
0
0
1
0
0
.020
.224
• 464
.640
.480
.470
.500
.375
.220
.720
.010
.020
MG/L
0.
1.
0.
0.
0.
0.
1.
0.
0.
0.
1.
0.
900
000
500
800
600
650
200
600
600
550
100
800
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
3.
0.
0.
0.
0.
0.
0.
070
035
024
024
024
025
070
140
015
030
310
100
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
c.
0.
0.
0.
p
010
020
024
005K
016
010
005
010
005K
005K
010
010
MG/L f
0.050
0.050
0.040
0.020
0.030
0.020
0.010
0.040
0.050
0.050
0.030
0.040
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/03/10
4837A2
31 25 30.0 100 42 30.0 4
MIDDLE ^ONCHO RIVEK
48 15 KNICKERBOCKER
T/TWIN 8UTTES RESERVOIR
UN1MP RD XING 1 Ml SW JCT 2NDRY RO 853
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/07
74/10/05
74/11/02
74/12/07
75/01/04
75/03/02
75/04/06
75/04/20
75/05/0*
75/05/25
75/06/22
75/08/03
00630 00625
TIME DEPTH N02kN03 TOT KJFL
OF N-TOTAL N
DAY FEET
09
08
08
09
09
12
14
14
14
15
13
13
30
45
55
35
45
15
00
00
00
00
00
15
MG/L
0.
5.
1.
1.
4.
2.
1.
0.
0.
0.
0.
0.
024
04Q
840
100L
100
500
300
800
340
380
010
005
MG/L
0.
1.
0.
0.
1.
0.
0.
0.
0.
0.
0.
0.
500
100
900
600
100
700
700
450
200
600
400
250
00610 00671 00665
NH3-N PHOS-DIS PriOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
015
025
020
016
032
020
035
025
025
020
045
015
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0
.010
.005K
.040
.008K
.005K
.020
.005
.004
.005K
.005K
.005
.010
MG/L P
0.050
0.020
0.010
0.020
0.020
0.010K
0.060
0.020
0.040
0.020
0.010
L ACTUAL VALUE Ii> KNOwN TO at
THAN VALUE GIVEN
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/03/10
483782
31 14 12.0 100 29 55.0 4
SOUTH ccrcHO RIVER
48 TOM GREEN CO MAP
I/TWIN BUTTES RESERVOIR
2NDHY RO 2335 BRDG 0.8 MI W JCT HWY 277
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE TIME DEPTH N02«»N03
FROM OF
TO DAY FEET
74/09/07
74/10/05
74/11/02
74/12/07
75/01/04
75/02/01
75/03/02
75/04/06
75/04/20
75/05/04
75/05/25
75/06/22
75/07/20
75/08/03
11
09
09
10
10
10
13
15
16
15
16
15
15
14
00
50
35
30
50
20
30
45
00
10
00
00
30
30
Ob30
«,N03
OTAL
iG/L
1.380
2.320
2.320
0.110
3.000
2.600
2.300
2.200
2.000
1.880
1.800
1.800
1.650
1.720
00625
TOT KJEL
N
MG/L
0.300
0.500
0.700
0.300
0.700
0.350
0.750
0.550
0.650
0.500
0.250
0.300
0.350
0.325
00610
NH3-N
TOTAL
MG/L
0.015
0.015
0.060
0.008
0.024
0.032
0.015
0.025
0.015
0.030
0.020
0.060
0.030
0.020
00671
PHOS-OIS
ORTHO
MG/L P
0.010
0.005K
0.035
0.008
0.005K
O.OOB
0.005
0.005K
0.005
0.005
0.005K
0.005K
0.005K
0.005
00665
PHOS-TOT
MG/L P
0.015
O.G10K
0.060
0.010
0.010
0.035
O.OlOK
0.010K
O.OlOK
0.020
0.04Q
0.040
O.OlOK
0.015
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/03/10
4837C1
31 16 25.0 100 37 50.0 4
DOVE CREEK
48 15 KNICKERbOCKER
T/T*IN BUTTES RESERVOlK
2NDRY RO 2335 8ROG 0.4 MI * KNICKERBOCKE
llEPALEb 2111204
0000 FEET DEPTH CLASS 00
DATE TIME DEPTH N02S.N03
FROM OF
TO DAY FEET
74/09/07
74/10/05
74/11/02
74/12/07
75/01/04
75/02/01
75/03/02
75/04/06
75/04/20
75/05/04
75/05/25
75/06/22
75/07/20
75/08/03
10 30
09 30
09 25
10 10
10 20
10 00
13 00
15 20
15 30
14 45
15 30
14 30
15 15
14 00
0630
I&N03
OTAL
IG/L
1.260
3.360
3.800
1.100L
4.400
3.900
3.300
3.200
2.900
2.700
2.800
2.800
2.630
2.750
00625
TOT KJEL
N
MG/L
0.300
0.500
0.300
0.300
0.700
0.200
1.050
0.500
0.350
0.900
0.250
0.350
0.200
0.200
00610
NH3-N
TOTAL
MG/L
0.030
0.020
0.015
0.008
0.016
0.024
0.015
0.010
0.020
0.025
0.010
0.015
0.020
0.010
00671
PHOS-OIS
ORTHO
MG/L P
0.005
0.005K
0.015
0.008K
0.005K
0.008K
0.010
0.005K
0.005
0.005
0.005K
0.005
0.005K
0.005
00665
PHOS-T07
MG/L P
0.010
0.010K
0.020
0.010K
0.010*
0.010K
a. 010
0.010*
0.010K
0.020
0.020
0.030
0.010
0.040
K VALUE KNOWN TO BE
LESS THAN INDICATED
L ACTUAL VALUE IS *NOWN TO dt
THAN VALUE GIVEN
-------
STORE! RETRIEVAL DATE 76/03/10
483701
31 19 45.0 100 38 20.0 4
SPRING C"?EEK
48 15 KNICKERBOCKER
T/TWIN 8UTTES RESERVOIR
200 YDS DOWNSTREAM BELOW 0AM SPILLWAY
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/07
74/10/05
74/11/02
74/12/07
75/01/04
75/02/01
75/03/02
75/04/06
75/04/20
75/05/04
75/05/25
75/07/20
75/08/03
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
10
09
09
09
10
09
12
15
15
14
15
15
13
15
15
15
45
15
45
45
00
00
30
45
00
45
MG/L
0.024
0.490
0.990
1.100L
4.100
4.400
4.200
3.200
2.750
1.900
2.200
1.500
1.450
MG/L
1.000
0.400
0.700
0.850
1.000
0.600
0.650
1.000
0.450
0.450
0.450
0.800
0.600
00610 00671 00665
NH3-N" PHOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.025
0.015
0.045
0.576
0.088
0.040
0.015
0.590
0.020
0.045
0.040
0.030
0.045
MG/L P
0.005
0.005K
0.035
0.008K
0.005K
o.ooe
0.010
0.005
0.005K
0.005
0.005K
0.005K
0.010
MG/L P
0.040
0.010
0.070
0.015
0.010K
0.020
0.010
0.010K
0.010K
0.030
0.040
0.030
0.040
K VALUE KNOWN TO BE
LESS THAN INDICATED
L ACTUAL VALUE 15 KNOWN TO BE
GREATtR THAN VALUE GIVEN
------- |