U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LAKEBASTROP
BASTRQP COUNTY
TEXAS
EPA REGION VI
WORKING PAPER No, 632
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
U\KEBASTRDP
BASIOT COWIY
"EXAS
EPA REGION VI
WORKING PAPER No, 632
WITH THE COOPERATION OF THE
TEXAS WATER QUALITY BOARD
AND THE
TEXAS NATIONAL GUARD
SEPTEPBER, 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 9
V. Literature Reviewed 14
VI. Appendices 15
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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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Ill
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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1v
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
-------
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
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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VI
bnr
LAKE BASTROP
® Tributary Sampling Site
X Lake Sampling Site
_TJ) Drainage Area Boundary
0 Electric Plant
o i 2 Km.
i i ...
1/2 Scale 1M1«
30' W—I
30"oe-
9714
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LAKE BASTROP
STORE! NO. 4802
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Lake Bastrop is meso-eutrophic; i.e.,
moderately well supplied with nutrients and productive. Whether
nutrient enrichment is beneficial or deleterious depends on the
actual or potential effect on the uses of the lake. 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.
Lake Bastrop ranked seventh in overall trophic quality when the
39 Texas reservoirs sampled in 1974 were compared using a combination
of six water quality parameters*. Eight of the reservoirs had less
median total phosphorus, two had less and five had the same median
dissolved orthophosphorus, eight had less and two had the same median
inorganic nitrogen, 20 had less mean chlorophyll a, and seven had
greater mean Secchi disc transparency. Marked depression or deple-
tion of hypolimnetic dissolved oxygen occurred at all three sampling
stations in May and August.
Survey limnologists observed many submerged macrophytes in the
shallows at all stations.
B. Rate-Limiting Nutrient:
The algal assay results are not considered representative of
conditions in the lake at the time samples were taken due to a
* See Appendix A.
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2
significant loss of phosphorus in the sample during shipment from
the field to the laboratory.
The lake data indicate nitrogen limitation in March and Novem-
ber and phosphorus limitation in May.
C. Nutrient Controllability:
1. Point sources—No known point sources discharged in the
Lake Bastrop drainage during the sampling year. However, phos-
phorus inputs from the Colorado River diversion are substantial,
and it is possible that the City of Austin contributes to the
enrichment of Lake Bastrop via the diversion.
The present phosphorus loading of 0.27 g/m2/year is greater
than that proposed by Vollenweider (Vollenweider and Dillon, 1974)
as a eutrophic loading (see page 13). Improvement of the present
trophic condition of Lake Bastrop is dependent upon the controlla-
bility of sources impacting the Colorado River upstream. Minimi-
zation of point-source phosphorus could result in a more phosphorus
limited condition in the lake and at least slow the present rate of
eutrophication.
2. Non-point sources--Non-point sources apparently contributed
the entire phosphorus load to Lake Bastrop during the sampling year.
Spicer Creek contributed 0.5%, the diversion from the Colorado River
contributed an estimated 89.3% and the ungaged minor tributaries and
immediate drainage contributed an estimated 3.6%.
As noted above, part of the load in the diversion from the
Colorado River may be contributed by point sources upstream on the
Colorado River. An additional investigation would be needed to
determine the significance of such sources.
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II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphometry :
1. Surface area: 3.67 kilometers2.
2. Mean depth: 5.6 meters.
3. Maximum depth: >13.4 meters.
4. Volume: 20.552 x 106 m3.
5. Mean hydraulic retention time: 5.2 years.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)ttt (m3/sec)ttt
Spicer Creek 2.3 0.007
Colorado River diversion - 0.184*
Minor tributaries &
immediate drainage - 18.6 0.047
Totals 20.9 0.238
2. Outlet -
Electric plant diversion - 0.055*
Spicer Creek 24.6 0.071
Total 24.6** 0.126***
C. Precipitation****:
1. Year of sampling: 92.0 centimeters.
2. Mean annual: 82.5 centimeters.
t Table of metric conversions—Appendix B.
tt Latchford, 1974.
ttt For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
* Yost, 1976 (see page 9).
** Includes area of lake.
*** Outflow adjusted to equal sum of inflows minus evaporation loss.
**** See Working Paper No. 175.
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4
III. WATER QUALITY SUMMARY
Lake Bastrop 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 lake (see map, page vi). During each visit, a single depth-
integrated (4.6 m or near bottom to surface) sample was composited
from the stations for phytoplankton identification and enumeration;
and during the March and November visits, 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 17.1
meters at station 1, 9.1 meters at station 2, and 13.4 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 properly preserved and were not analyzed).
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A. SUMMARY OF PHYSICAL AND
PARAMETER
TEMP (C)
OISS OXY (MG/L)
CNDCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTMO P (MG/L)
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N
CHLRPYL A (UG/L)
SECCHI (METERS)
RANGE
16.9 - 25.7
3*° ~ 8.8
645. - 770.
7'9 * 8.7
1*9. - 153.
0.017 - 0.029
0.007 - O.Olb
0.020 - 0.060
0.020 - 0.240
0.200 - 0.600
0.040 - 0.280
0.220 - 0.660
s«9 - 7.0
1'5 ' 1.8
-ING ( 2
>ITES
MEAN
21.7
6.4
713.
8.4
151.
0.024
0.011
0.028
0.063
0.487
0.091
0.515
6.4
1.6
STORET CODE 4602 »»*>™
1/14/74 ' ?ND SAMPLING ( 5/22/74)
MEDIAN
22.8
6.3
730.
8.5
151.
0.024
0.011
0.020
0.020
0.500
0.040
0.520
6.4
1.5
1
19.9
0.2
708.
7.3
121.
0.012
0.002
0.020
0.020
0.300
0.040
0.330
8.2
2.3
3
RANGE
- 33.6
8.0
- 896.
8.8
- 155.
- 0.042
- 0.012
- 0.090
- 0.540
- 0.900
- 0.570
- 0.990
- 49.8
3.0
SITES
MEAN
28.8
4.4
825.
8.3
132.
0.019
0.004
0.035
0.099
0.507
0.134
0.541
32.4
2.7
MEDIAN
30.6
5.8
840.
8.5
128.
0.017
0.003
0.030
0.030
0.400
0.050
0.450
39.3
2.9
BASTROP LAKE
3RD SAMPLING ( 8/16/7*'
3 SITES
RANGE
20.4 - 33.3
0.0 - 7.6
724. - 900.
7.3 - 8.8
•••••• _<
•••••» _|
MEAN MEDIAN
29.4 30.*
5.0
4.4
841.
8.2
85*.
a.4
*»•»*« -*•«••••«•«••••*••••••#
*»»»** -»*«o»»»««»»»»««»»»»»»»
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A. SUMMARY OF PHYSICAL AND CHEMICAL CHARACTERISTICS TOR BASTROP LAKE
STORET CODE 4802
4TH SAMPLING (ll/ 4/74)
PARAMETER
TEMP (C)
OISS OXY (MG/L)
CNDCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L»
ORTHO P (MG/L)
N03»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
23.5 - 24.4
6.0 -
7346. - 7253.
7.9 -
124. - 138.
0.018 - 0.030
0.004 - 0.016
0.030 - 0.050
0.060 - 0.140
0.300 - 0.600
0.090 - 0.170
0.330 - 0.630
3.2 -
1.2 -
3 SITES
MEAN
4
0 .
>.
2
1.
10
6
10
0
0
'0
10
7
5
24.0
7.2
7250.
8.1
132.
0.024
0.009
0.034
0.081
0.492
0.115
0.526
3.5
1.4
MEDIAN
24.1
7.2
7251.
8.1
132.
0.023
0.008
0.030
0.070
0.500
0.110
0.540
3.6
1.5
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B. Biological Characteristics:
1. Phytoplankton* -
Sampling
Date
03/14/74
05/22-23/74
11/04/74
Dominant
Genera
1. Pediastrum sp.
2. Oocystis sp.
3. Chroomonas sp.
4. Cryptomonas sp.
5. Scenedesmus sp.
Other genera
Total
1. Pennate diatoms
2. Oscillatoria sp.
3. Merismopedia sp.
4. Pediastrum sp.
5. Chroomonas sp.
Other genera
Total
1. Chroomonas sp.
2. Cryptomonas sp.
3. Pediastrum sp.
4. TetraedrorT sp.
5. Nitzschia sp.
Other genera
Total
Algal Units
per ml
2,294
3,247
1,082
* The August phytoplankton sample was lost in shipment.
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8
2. Chlorophyll a_ -
Sampling Station Chlorophyll a^
Date Number (ytg/1)
03/14/74 1 7.0
2 6.4
3 5.9
05/22-23/74 1 8.2
2 39.3
3 49.8
08/16/74 1 8.2
2 7.1
3 6.3
11/04/74 1 3.6
2 3.2
3 3.7
C. Limiting Nutrient Study:
Because of significant changes in nutrients in the algal assay
samples from the time of collection to the beginning of the
assay, the results are not representative of conditions in the
lake at the time of sampling.
The lake data indicate nitrogen limitation in March and
November and phosphorus limitation in May (i.e., the mean inor-
ganic nitrogen to orthophosphorus ratios were 8 to 1, 13 to 1,
and 34 to 1, respectively).
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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 June,
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 lake.
The level of the lake is maintained by pumping water from the
Colorado River. Diversions during 1964-73 ranged from 165,288 to
13,963,106 m3/yr (0.005 - 0.443 m3/sec); the ten year average is
5,797,403 m3/yr (0.184 m3/sec). Water from the lake is used in the
cooling towers of an electric plant. Up to 13,260,017 m3/yr (0.420
m3/sec) is authorized (Yost, 1976).
In this report, nutrient loads for sampled tributaries were
calculated using mean annual concentrations and mean annual flows.
Nutrient loads in the Colorado River diversion were calculated
using the mean annual flow and the mean concentrations at the U.S.G.S.
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10
water quality sampling station (08158650) located 15.4 km downstream
from the Austin gaging station (Anonymous, 1976). Nutrient loads in the
electric plant withdrawal were calculated using the mean estimated flow
and mean concentrations at lake sampling station 2.
Nutrient loads for unsampled "minor tributaries and immediate drain-
age" ("ZZ" of U.S.G.S.) were estimated using the mean concentrations in
Spicer Creek at station A-2 and the mean annual ZZ flow.
No known point sources discharged within the Lake Bastrop drainage
basin during the sampling year.
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11
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) -
Spicer Creek 5 0.5
Colorado River diversion 880 89.3
b. Minor tributaries & immediate
drainage (non-point load) - 35 3.6
c. Known municipal STP's - None
d. Septic tanks - None
e. Known industrial - None
f. Direct precipitation* - 65 6.6
Total 985 100.0
2. Outputs -
Reservoir outlet - Electric plant
diversion 40
Spicer Creek 65
Total 105
3. Net annual P accumulation - 880 kg.
* See Working Paper No. 175.
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12
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
*g N/ % of
Source yr total
a. Tributaries (non-point load) -
Spicer Creek 140 1.2
Colorado River diversion 7,070 58.4
b. Minor tributaries & immediate
drainage (non-point load) - 930 7.7
c. Known municipal STP's - None
d. Septic tanks - None
e. Known industrial - None
f. Direct precipitation* - 3,960 32.7
Total 12,100 100.0
2. Outputs -
Reservoir outlet - Electric plant
diversion 895
Spicer Creek 1.900
Total 2,795
3. Net annual N accumulation - 9,305 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Spicer Creek 2 61
* See Working Paper No. 175.
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13
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/mVyr 0.27 0.24 3.3 2.5
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Lake Bastrop:
"Dangerous" (eutrophic loading) 0.22
"Permissible" (oligotrophic loading) 0.11
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14
V. LITERATURE REVIEWED
Anonymous, 1976. Water resources data for Texas, water year 1975.
Water-Data Rept. TX-75-1, U.S. Geol. Surv., Austin.
Dougherty, John P., 1975. Evaporation data in Texas. Report 192,
TX Water Dev. Bd., Austin.
Latchford, John B., Jr., 1974. Personal communication (lake mor-
phometry). TX Water Qua!. Bd., Austin.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophicatipn research.
Natl. Res. Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
Yost, I. D., 1976. Personal communication (hydrological records
of diversion from Colorado River; electric plant authorized
withdrawal). U.S. Geol. Surv., Austin.
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15
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAKES RANKED BY iNOFX NOS.
RANK LAKE CODE LAKE NAME
INDEX NO
1 4809
2 4823
3 4H13
<. 4816
5 4801
6 4805
7 4802
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
CANYON RESERVOIR
LAKE MEREDITH
EAGLE MOUNTAIN LAKE
KEMP LAKE
AMISTAO LAKE
BROnNWOOD LAKE
BASTRUP LAKE
WHITE RIVER RESERVOIR
POSSUM KINGOOM 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
CAOOO LAKE
FT PHANTOM HILL LAKE
LAKE BUCHANAN
STAMFORD LAKE
LAVON RESERVOIR
I AKE
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
?53
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LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
29 4821 LYNDON 8 JOHNSON LAKE 238
30 4834 TEXOMA LAKE 217
31 4829 SOMEWVILLE LAKE 208
32 4826 SAN ANGELO RESERVOIR 200
33 4833 TEXAHKANA LAKE 176
34 4815 GARZA LITTLE ELM RESERVO 173
35 4836 TRINIDAD 169
36 4804 BRAUNIG LAKE 159
37 4811 CORPUS CRISTI LAKE 155
38 4817 HOUSTON LAKE 139
39 4820 LIVINGSTON LAKE 91
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
4801 AMISTAD LAKE
4802 8ASTKOP LAKE
4803 BELTON RESERVOIR
4804 BSAUNIG LAKE
4805 BROWNWOOO LAKE
4806 LAKE BUCHANAN
4807 CAOOO 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 OR 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
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
,'i n?&
MEDIAN
INO^G 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
ft ii,»,i*i
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
<.(«,•> SPP,
MEAN
CHLOHA
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
'••,,775
15-
MIN 00
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
9.800
14.600
10.400
12.400
15.000
8.800
15.000
14.900
15.000
14.900
14.800
15.000
10.200
15.000
15..000
MEDIAN
DISS O«THO P
0.009
0.007
0.007
0.062
0.007
0.012
0.01J
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
4631 STILLHOUSE HOLLO* RESEKV
4832 TAWAKONI LAKE
4833 TEXARKANA LAKE
4834 TEXOMA LAKE
4835 TRAVIS LAKE
4836 TRINIDAD
4837 TWIN BUTTES RESERVOIR
4838 WHITE RIVER RESERVOIR
4839 WHITNEY LAKE
MEDIAN
TOTAL P
0.053
0.073
0.018
0.046
0.106
0.042
0.018
0.389
0.029
0.020
0.028
MEDIAN
1NO«G N
0.115
O.C60
0.160
0.100
0.120
0.160
0.250
0.110
0.250
0.110
0.120
500-
MEAN SEC
473. B33
482.714
406.250
466.417
478.500
451.321
389.913
479.500
454.917
434.500
430.500
MEAN
CHLOftA
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
OISS OrtTrlO f
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 *ITH HIGHER VALUES (NUMBER OF LAKES KITH HIGHF.K VALUES)
LAKE
CODE LAKE NAME
<«80l AMISTAO LAKE
4B02 HASTROP LAKE
4803 BELTON RESERVOIR
4804 BRAUNIG LAKE
4805 BROrfNVfOOD LAKE
4806 LAKE BUCHANAN
4807 CAOOO LAKE
4808 CALAVERAS LAKE
4809 CANYON RESERVOIR
4810 LAKE COLORADO CITY
4811 CORPUS CRISTI LAKE
4813 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 B JOHNSON LAKE
4822 MEDINA LAKE
4823 LAKE MEREDITH
4824 PALESTINE LAKE
4825 POSSUM KINGDOM RESERVOIR
4826 SAN ANOELO RESERVOIR
4827 SAM RAYBURN 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
-•
(
(
(
(
(
(
(
(
(
(
{
(
(
(
(
<
(
(
(
(
(
(
(
(
(
(
(
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)
MEDIAN
INORG N
5 (
76 t
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 (
•B '• ('
2)
28)
10)
16)
26)
7)
33)
38)
3)
28)
18)
31)
33)
25)
5)
22)
6)
28)
ID
D
4)
0)
33)
12)
33)
17)
15)
f i
500-
MEAN
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
«,S
SEC
( 38)
( 3D
( 37)
( 19)
( 11)
( 28)
( 16)
( 18)
( 36)
( 10)
( 7)
( 12)
( 13)
( 8)
( 6)
( 21)
( 0)
< 25)
( D
( 15)
( 20)
( 34)
( 27)
( 24)
( 32)
( 3)
( 26)
f '•?)
MEAN
CrtLOHA
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)
( 2D
( 9)
( 15)
( 32)
( 10)
( 25)
( 14)
( 36)
( 20)
( 22)
1 0)
( 29)
( 19)
15-
MIN 00
39 (
17 t
17 t
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 OHTrtO P
63 (
92 (
84 <
5 (
84 (
39 (
30 (
92 <
97 <
39 (
8 <
63 <
76 (
16 1
21 <
92 1
11 1
46 1
21 i
3 i
30
100
63
51
63
46
63
76
21)
34)
3D
2)
3D
14)
10)
34)
37)
14)
; 3)
21)
; 28>
! 6)
1 7)
I 34)
1 4)
I 17)
I 7)
I 1)
t 10)
( 38)
( 21)
t 19)
( 21)
( 17)
( 21)
( 28)
INOE.X
NO
402
343
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 CAKES WITH HIGHER VALUES (NUMBER OF LAKES *ITH HIGHER VALUES)
LAKE
CODE LAKE NAME
4829 SOMERVILLE LAKE
4830 STAMFORD LAKE
4831 STILLHOUSE HOLLOW RESEKV
4832 TAWAKONI LAKE
4833 TEXARKANA LAKE
4834 TEXOMA LAKE
4B35 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
INO»G N
55 (
V7 .
37 i
70 i
51 i
34 <
21 <
61
21
61
51
[ 21)
( 37)
! 14)
I 26)
1 19)
I 13)
1 7)
( 22)
f 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 U^THO 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
206
259
372
2*3
176
217
384
169
311
390
357
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 « feet
-4
Cubic meters x 8.107 x 10 = 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 TEAMS
07/02/76
LAKE CODE 4802
bASTROP
TOTAL DRAINAGE AREA OF LAKE(SO KM)
24.6
4fl02Al
4P02A2
4602ZZ
SUB-DRAINAGE
AREAfSO KM)
24.6
2.3
22.3
FEB
0.093 0.065
0.011 0.008
0.068 0.054
MAR
0.042
O.OC3
0.031
APP
0.091
0.008
0.062
MAY
0.147
0.017
0.096
NORMALIZED FLOWS(CMS)
JUN JUL AUG
0.085
o.ooe
0.054
0.028
0.003
0.017
0.020
0.0
0.008
SEP
0.110
0.011
0.071
OCT
0.082
0.008
0.054
NOV
0.0*8
0.003
0.034
OEC
MEA"1
0.028 0.07'
0.003 0.00
0.014 0.04'
SUMMARY
TOTAL DRAINAGE AREA OF LAKE =
SUM OF SUB-DRAINAGE AREAS =
24.6
24.6
TOTAL FLOW IN
TOTAL FLOW OUT
0.65
0.86
MEAN MONTHLY FLOWS AND JAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
4802A1
4802A2
4802ZZ
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
0.085
0.068
0.850
0.311
0.142
0.272
0.057
0.184
0.481
0.623
0.011
0.595
0.008
0.017
0.093
0.034
0.017
0.031
0.006
0.020
0.001
0.071
0.001
0.000
0.008
0.006
0.079
0.028
0.014
0.025
0.006
0.017
0.045
0.059
0.001
0.057
7
4
1
6
3
7
7
11
9
6
3
1
4
4
1
6
3
7
7
11
9
6
3
1
FLOW DAY
FLOW DAY
FLOW
0.001
0.034
0.164
0.215
0.190
0.275
0.071
0.031
0.102
0.040
0.0
0.0
0.0
0.0
0.017
0.023
0.020
0.031
0.008
0.0
0.011
0.0
0.0
0.0
25
23
11
25
23
0.020
4.248
0.595
0.0
0.481
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/02/11
DATE TIME DE»TH
FROM OF
TO DAY FEET
74/03/14 14 00 0000
14 00 0006
14 00 0015
14 00 0030
14 00 0045
14 00 0056
74/05/22 15 25 0000
15 ?5 0005
15 25 0015
15 25 0026
15 25 0040
15 25 0055
74/08/16 13 00 0000
13 00 0010
13 00 0023
13 00 0035
13 00 0050
74/11/04 14 50 0000
14 50 0005
14 50 0015
14 50 0026
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/03/14 14 00 0000
14 00 0006
14 00 0015
14 00 0030
14 00 0045
14 00 0056
74/05/22 15 25 0000
15 25 0005
15 25 0015
15 25 0026
15 25 0040
15 25 0055
74/08/16 1'3 00 0000
13 00 0005
13 00 0023
74/11/04 14 50 0000
14 50 0005
14 50 0015
14 50 0026
00010
WATER
TEMP
CENT
23.6
23.6
23.5
19.3
17.0
16.9
33.1
33.0
30.6
25.9
21.5
19.9
31.7
31.6
30.0
27.2
20.4
24.1
24.0
24.1
24.1
00665
PHOS-TOT
MG/L P
0.029
0.028
0.026
0.019
0.017
0.018
0.014
0.015
0.017
0.023
0.019
0.0*2
0.02S
0.026
0.028
0.030
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
72
8.8
8.4
5.0
4.6
a f>
•»• o
120
7.8
6.8
0.8
0.2
0.2
7.4 90
7.6
4.6
0.6
0.0
7.4 61
7.2
7.6
7.6
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
7.0
8.2
50.0
1.0
8.2
50.0
i n
1 . V
3.6
740
740
r ^w
740
675
645
fLJ.C
O4 j
886
883
A&f)
O"*V
779
727
708
878
871
842
802
724
7246
7249
7249
7248
480201
30 09 20.0 097
BASTROP LAKE
48021 TEXAS
11EPALES
3
0400
PH
SU
8.70
8.70
8.45
7.95
7.90
7.90
8.80
8.80
8.80
7.80
7.70
7.70
8.60
8.70
8.40
7.60
7.50
8.23
8.21
8.19
8.15
00410
T ALK
CAC03
MG/L
151
150
150
151
153
153
121
121
124
132
142
155
124
135
138
136
17 30.0
2111202
0060
00610
NH3-N
TOTAL
MG/L
0.020
0.020
0.020
0.050
0.170
0.200
0.030
0.020
0.020
0.040
0.170
0.540
0.070
0.060
0.060
0.060
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.600
0.600
0.500
0.500
0.600
0.600
0.400
0.400
0.300
0.400
0.400
0.900
0.500
0.300
0.300
0.600
00630
N02&N03
N-TOTAL
MG/L
0.020
0.020
0.020K
0.030
0.050
0.060
0.050
0.030
0.030
0.050
0.050
0.030
0.040
0.050
0.030
0.030
00671
PHOS-OIS
ORTHO
MG/L P
0.015
0.007
0.014
0.013
0.007
0.013
0.005
0.003
0.003
0.005
0.006
0.005
0.004
0.007
0.007
0.014
K VALUE KNOWN TO 8E
-------
STORET RETRIEVAL DATE 76/03/11
48C202
30 09 25.0 097 17 17.0
BASTROP LAKE
48021 TEXAS
11EPALES
DATE
FROM
TO
74/03/14
74/05/23
74/08/16
74/11/04
DATE
FROM
TO
74/03/14
74/05/23
74/08/16
74/11/04
TIME DEPTH
OF
DAY FEET
14 35 0000
14 35 0006
14 35 0015
14 35 0027
09 45 0000
09 45 0005
09 45 0015
09 45 0026
13 30 0000
13 30 0005
13 30 0020
13 30 0030
15 10 0000
15 10 0005
15 10 0010
TIME DEPTH
OF
DAY FEET
14 35 0000
14 35 0006
14 35 0015
14 35 0027
09 45 0000
09 45 0005
09 45 0015
09 45 0026
13 30 0000
15 10 0000
15 10 0005
15 10 0010
00010
HATER
TEMP
CENT
23.0
23.0
22.7
20.0
31.5
31.5
29.9
24.8
31.8
31.5
30.5
29.0
23.5
23.5
23.5
00665
PHOS-TOT
MG/L P
0.025
0.029
0.027
0.022
0.018
0.012
0.015
0.029
0.020
0.020
0.02*
00300
DO
MG/L
8.6
8.0
5.8
7.8
7.0
1.2
7.4
7.6
5.4
2.0
7.0
7.4
8.0
32217
CHLRPHYL
A
UG/L
6.4
39.3
7. 1
3.2
00077
TRANSP
SECCHI
INCHES
60
114
96
60
00031
INCDT LT
REMNING
PERCENT
50.0
1.0
00094
CNDUCTVY
FIELD
MICROMHO
730
730
725
690
861
861
835
768
872
869
855
831
7251
7251
7251
3
00400
PH
SU
8.70
8.70
8.60
8.25
8.75
8.75
8.60
7.60
8.80
8.70
8.40
7.80
8.23
8.14
8.19
00410
T ALK
CAC03
MG/L
153
152
152
152
128
126
126
141
137
137
132
2111202
0031
00610
NH3-N
TOTAL
MG/L
0.020K
0.020K
0.020K
0.030
0.080
0.020
0.020K
0.100
0.070
0.070
0.070
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.600
0.400
0.200
0.300
0.900
0.400
0.400
0.500
0.600
0.500
0.500
00630
N02&N03
N-TOTAL
MG/L
0.020
0.020
0.020
0.030
0.090
0.030
0.020
0.030
0.030
0.030
0.040
00671
PHOS-DIS
ORTrtO
MG/L P
0.010
0.011
0.007
0.014
0.012
0.003
0.002
0.004
0.005
0.011
0.009
K VALUE KNOWN TO 8E
LESS THAN INDICATED
-------
STORET RETRIEVAL OATE 76/02/11
480303
30 09 10.0 097 17
BASTROP LAKE
TEXAS
12.C
11EPALES
DATE
FROM
TO
74/03/14
74/05/33
74/08/16
74/11/04
OATE
FROM
TO
74/03/14
74/05/23
74/08/16
74/11/04
TIME DEPTH
OF
DAY FEET
15 00 0000
15 00 0006
15 00 0015
15 00 0027
15 00 0041
10 10 0000
10 10 0005
10 10 0010
10 10 0020
10 10 0035
13 40 0000
13 40 0005
13 40 0020
13 40 0030
13 40 0041
15 25 0000
IS 25 0005
15 25 0015
15 25 0030
15 25 0044
TIME DEPTH
OF
DAY FEET
15 00 0000
15 00 0006
15 00 0015
15 00 0027
15 00 0041
10 10 0000
10 10 0004
10 10 0005
10 10 0010
10 10 0020
10 10 0035
13 40 0000
15 25 0000
15 25 0005
15 25 0015
15 25 0030
15 25 0044
00010
MATER
TEMP
CENT
25.7
25.7
22.8
20.4
17.9
33.6
33.5
31.3
29.6
22.5
33.3
33.2
30.4
29.0
22.1
24.4
24.3
24.3
24.1
24.1
00665
PHOS-TOT
MG/L P
0.024
0.026
0.023
0.022
0.019
0.015
0.014
0.015
0.017
0.022
0.018
0.020
0.020
0.023
0.030
0030C 00077
DO TRANSP
SECCHI
MG/L INCHES
60
4.8
8.2
6.8
3.0
90
7.4
8.0
4.8
1.0
7.2 90
7.0
3.6
0.8
0.0
6.8 48
7.2
7.0
7.0
6.0
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
5.9
49.8
50.0
1.0
6.3
3.7
00094
CNDUCTVY
FIELD
MICROMHO
770
770
740
695
660
896
894
860
830
747
900
900
849
827
755
7251
7353
7252
7252
7252
3
00400
PH
SU
8.65
8.70
8.50
8.10
7.90
8.60
8.50
8.40
8.00
7.25
8.70
8.70
8.00
7.80
7.30
8.13
8.10
8.04
7.98
7.88
00410
T ALK
CAC03
MG/L
149
150
151
ISO
153
128
128
128
139
151
131
130
137
127
127
2111202
0045
00610
NH3-N
TOTAL
MG/L
0.020
0.020K
0.020
0.080
0.240
0.020
0.020
0.030
0.020
0.360
0.080
0.080
0.100
0.110
0.140
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.500
0.500
0.400
0.400
0.600
0.700
0.400
0.400
0.400
0.700
0.600
0.500
0.400
0.500
0.600
00630
N02&N03
N-TOTAL
MG/L
0.020K
0.020K
0.020K
0.030
0.040
0.020
0.020
0.020K
0.030
0.020K
0.030
0.030
0.030
0.040
0.030
00671
PHOS-01S
ORTHO
MG/L P
0.011
0.013
0.011
0.007
0.013
0.003
0.003
0.002
0.003
0.003
0.010
0.007
0.008
0.016
0.012
K UB1 I IT XiVCYMV -n
-------
. APPENDIX E
TRIBUTARY DATA
-------
STOftET RETRIEVAL DATE 7b/03/10
4802A1
30 09 10.0 097 17 50.0 4
SPICED CHEEK
48465 7.5 8ASSTHOP, Tx
0/LAKE BASSTHOP
BANK SAMP F*OM OIkT WO .5 Ml rf OF DAM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/07
74/10/04
74/11/01
74/12/06
75/01/03
75/02/07
75/03/07
75/04/11
75/04/25
75/05/09
75/05/23
75/06/06
75/06/11
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET MG/L MG/L
17
09
09
08
13
12
14
13
11
13
16
09
18
45
25
35
30
50
20
30
20
15
30
00
30
45
0
0
0
0
0
0
0
0
0
0
0
0
1
.016
.480
.032
.088
.056
.540
.020
.010
.010
.175
.025
.015
.050
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
400
900
600
700
500
600
400
475
450
850
850
950
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L MG/L P MG/L P
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
040
075
065
040
072
024
065
046
040
025
025
070
045
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
OOSK
005
OOSK
010
005
008K
OOSK
Oil
OOSK
OOSK
OOSK
OOSK
025
0.010K
0.040
0.010
0.020
0.010K
0.010K
0.011
0.010K
0.030
0.020
0.010K
0.150
K VALUE KNOWN TO 8E
LESS THAN INDICATED
-------
STORET RETRIEVAL OATE 76/03/JO
DATE TIME DEPTH N02S.N03
FROM OF
TO DAY FEET
74/11/01 09 20
74/12/06 08 45
75/01/03 13 30
75/02/07 12 00
75/03/07 14 15
75/05/09 13 05
75/05/23 16 15
4802A2
30 10 40.0 097 15 00.0 4
SPICER CREEK
48 7.5 BASSTHOP. TX
T/LAKE BASSTROP
BRDG ON SEC RO 1.5 Ml SE OF CAMP SWIFT
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
'&N03
OTAL
IG/L
0.160
0.048
0.064
0.060
0.045
0.070
0.055
00625
TOT KJEL
N
MG/L
0.600
0.400
0.500
0.600
0.850
0.550
0.400
00610
NH3-N
TOTAL
MG/L
0.030
0.032
0.032
0.032
0.075
0.065
0.020
00671
PHOS-DIS
ORTHO
MG/L P
0.030
0.010
0.010
0.016
0.005K
0.010
0.010
00665
PHOS-TOT
MG/L P
0.035
0.020
0.030
0.020
0.020
0.010
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |