U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LAKE BROI-f1WOOD
BROWN COUNTY
TEXAS
EPA REGION VI
WORKING PAPER No, 635
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440
-------
REPORT
ON
LAKE BRDWNWDCD
BROW COUNTY
TEXAS
EPA REGION VI
WORKING PAPER No, 635
WITH THE COOPERATION OF THE
TEXAS 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 10
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.
-------
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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TV
NATIONAL EUTROPHICATION SURVEY
STUDY RESERVOIRS
' State of Texas
NAME
Amistad
Bastrop
Bel ton
Braunig
Brownwood
Buchanan
Caddo
t
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
Coma!
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
-------
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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L,
,/
• Ned
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LAKE BROWNWOOD
X
C
0
0
Tributary Sampling Site
Lake Sampling Site
Drainage Area Boundary
10 zo *m.
t 10 HI.
Scale
J .>**
Jlexas\
XT'
Map Location
31 *5' —
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LAKE BROWNWOOD
STORE! NO. 4805
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Lake Brownwood is eutrophic;
i.e., well supplied with nutrients and quite productive.
Whether nutrient enrichment is beneficial or deleterious de-
pends on the actual or potential effect on the uses of the
lake. In this regard, the Texas Water Quality Board has indi-
cated that there is little or no known impairment of the desig-
nated beneficial uses of this lake.
Lake Brownwood ranked sixth in overall trophic quality when
the 39 Texas reservoirs sampled in 1974 were compared using a
combination of six parameters*. Thirteen of the reservoirs had
less median total phosphorus, two had less and five had the
same median dissolved phosphorus, eleven had less and one had
the same median inorganic nitrogen, five had less mean
chlorophyll a^, and 27 had greater mean Secchi disc transparency.
Marked depression of dissolved oxygen with depth occurred at
station 1 in August.
Survey limnologists did not observe algal concentrations or
macrophytes during their sampling visits.
B. Rate-Limiting Nutrient:
The results of the algal assay indicate phosphorus was the
rate-limiting nutrient at the time the sample was collected
(03/07/74).
* See Appendix A.
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The lake data indicate phosphorus limitation in March and May
but nitrogen limitation in August and October.
C. Nutrient Controllability:
1. Point sources—No known municipal or industrial point
sources impacted Lake Brownwood during the sampling year. Septic
tanks serving lakeshore dwellings and recreation areas were
estimated to have contributed 2% of the total phosphorus load to
the lake, but a shoreline survey would be needed to determine the
significance of those sources.
The present phosphorus loading of 0.29 g/m2/yr is less than
that proposed by Vollenwekit-r (Vollenweider and Dillon, 1974) as
a eutrophic loading but is more than his suggested oligotrophic
loading (see page 12).
2. Non-point sources—The non-point phosphorus load, including
precipitation, amounted to 98.0% of the total load reaching the
lake. Jim Ned Creek contributed 53.2% of the total, Pecan Bayou
added 22.6%, and ungaged tributaries contributed an estimated
16.2% of the total.
The non-point phosphorus exports of Jim Ned Creek and Pecan
Bayou were 3 and 1 kg/km2/yr, respectively (see page 11). These
export rates are quite comparable to the rate of a tributary of
nearby Lake Colorado City* (1 kg/km2/yr) but higher than a tribu-
tary of 0. C. Fisher Reservoir** (<1 kg/km2/yr).
* Working Paper No. 640.
** Working Paper No. 656.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Lake Morphometry :
1. Surface area: 29.54 kilometers2.
2. Mean depth: 6.0 meters.
3. Maximum depth: >16.8 meters.
4. Volume: 177.240 x 106 m3.
5. Mean hydraulic retention time: 1.5 years (based on outflow)
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Pecan Bayou 1,623.9 2.000
Jim Ned Creek 1,634.3 2.003
Minor tributaries &
immediate drainage - 687.9 0.890
Totals 3,946.1 4.893
2. Outlet -
Brownwood Aqueduct 0.0 0.750
Pecan Bayou 3,975.6 2.894
Totals 3,975.6** 3.644
C. Precipitation***:
1. Year of sampling: 74.2 centimeters.
2. Mean annual: 69.6 centimeters.
t Table of metric conversions—Appendix B.
tt Latchford, 1974.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of lake.
*** See Working Paper No. 175.
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III. LAKE WATER QUALITY SUMMARY
Lake Brownwood was sampled four times during 1974 by means of a
pontoon-equipped Huey helicopter. Each time, samples for physical and
chemical parameters were collected from four stations on the lake and
from two or more depths at each station (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 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 16.8 meters
at station 1, 8.2 meters at station 2, 3.0 meters at station 3, and
9.1 meters at station 4.
The sampling results are presented in full in Appendix D and are
summarized in the following table.
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PARAMETER
TEMP (C)
oiss OXY (MG/L>
CNDCTVY (MCROMOJ
PH (STAND UNITS)
TOT ALK (MG/D
TOT P (MG/L)
ORTHO P (MG/D
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (Ur,/L>
SECCHI (METERS)
A. SUMMARY OF PHYSICAL AND
1ST SAMPLING ( 3/ 7/74)
4 SITES
CHEMICAL CHARACTERISTICS FOR BROWNWOOD LAKE
sro^er CODE 4^0
RANGE
11,7 - 18.1
8.1 - 10.1
<«70. - 548.
8.2 - 8.4
121. - 131.
0.010 - 0.071
0.004 - 0.015
0.050 - 0.090
0.020 - 0.040
0.300 - 0.700
0.070 - 0.130
0.360 - 0.760
0.6 - 2.2
0.5 - 1.5
?NO SAMPLING ( 5/16/74)
4 SITES
3RD SAMPLING ( 8/ 6/74)
4 SITES
MEAN
14.9
9.3
506.
8.3
125.
0.026
0.007
0.065
0.032
0.446
0.097
0.512
1.1
1.0
MEDIAN
15.0
9.4
500.
8.3
125,
0.023
O.OG6
0.070
0.030
0.400
0.100
0.470
0.8
1.0
RANGE
21.3
4.4
625.
7.9
117.
0.017
0.005
0.030
0.020
0.300
0.050
0.340
1.4
0.1
- 25.9
7.6
- 695.
8.3
- 123.
- 0.083
- 0.010
- 0.080
- 0.060
- 0.900
- 0.140
- 0.980
4.7
0.9
MEAN
24.5
6.4
649.
8.2
120.
0.036
0.007
0.052
0.043
0.520
0.095
0.572
3.2
0.6
MEDIAN
24.7
7.0
634.
8.2
119.
0.024
0.007
0.040
0.040
0.500
0.080
0.540
3.4
0.7
RANGE
24.3
0.6
669.
7.7
116.
0.014
0.002
0.020
0.020
0.200
0.040
0.220
6.1
0.3
- 26.5
6.8
- 699.
8.3
- 132.
- 0.074
- 0.013
- 0.060
- 0.130
- 0.800
- 0.150
- 0.820
- 12.9
1.5
MEAN
25.9
5.1
691.
8.0
122.
0.029
0.006
0.024
0.045
0.354
0.06b
0.378
9.3
0.8
MEDIAN
26.1
6.0
694.
8.1
121.
0.021
0.006
0.020
0.040
0.300
0.060
0.320
•v.O
0.6
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A. SUMMARY or PHYSICAL AND CHEMICAL CHARACTERISTICS FOH a«owN«ooD LAKE
STCMET CUOE 4
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
03/07/74
05/16/74
08/06/74
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.
Chroomonas sp.
Flagellates
Ankistrodesmus sp,
Nitzschia sp.
Cryptomonas s£.
Other genera
Total
Nitzschia sp.
Cryptomonas sp.
Chi amydomonas sj>.
Chroomonas sp.
Lyngbya sp_.
Other genera
Total
Lyngbya sp.
Oscillatoria sp.
Raphidiopsis sji.
Nitzschia sp.
Cryptomonas sj).
Other genera
Total
Chlamydomas sp.
Chroomonas sp.
Cryptomonas sp.
Cyclotella SJD.
Gymnodinium sj).
Other genera
Algal Units
per ml
Total
1,407
919
238
204
170
136
410
2,077
1,277
998
399
399
319
599
3,991
204
204
204
58
58
291
1,019
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2. Chlorophyll a -
Sampling
Date
03/07/74
05/16/74
08/06/74
10/29/74
Station
Number
- 1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P
Cone, (mg/1)
Inorganic N
Cone, (mg/1)
Chlorophyll a
(yg/D
0.7
0.6
2.2
1.0
2.2
1.4
4.6
4.7
6.1
10.6
12.9
7.5
6.5
3.8
8.8
4.6
Maximum yield
(mg/1-dry wt.)
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential primary productivity
0.005
0.055
0.055
0.005
0.112
0.112
1.112
1.112
0.1
2.8
15.3
0.1
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of Lake Brownwood was low when the sample was taken in
March, 1974. Also, the significant increase in yield when
orthophosphorus was added and the lack of response to
nitrogen added alone indicate phosphorus limitation.
The lake data indicate phosphorus limitation in March
and in May (the mean inorganic nitrogen/orthophosphorus
ratio was 14/1 at those times). However, nitrogen limi-
tation is indicated in August and October; i.e., the mean
N/P ratios were 11/1 and 10/1, respectively, and nitrogen
limitation would be expected.
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10
IV. NUTRIENT LOADINGS f
(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 July,
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.
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/km 2/year, at stations A-2 and C-l and multiplying
the means by the ZZ area in km2.
No known wastewater treatment plants impacted Lake Brownwood
during the sampling year.
* See Working Paper No. 175.
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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) -
Pecan Bayou 1,925 22.6
Jim Ned Creek 4,530 53.2
b. Minor tributaries & immediate
drainage (non-point load) - 1,375 16.2
c. Known municipal STP's - None
d. Septic tanks* - 170 2.0
e. Known industrial - None
f. Direct precipitation** - 515 6.0
Total 8,515 100.0
2. Outputs -
Lake outlet - Brownwood Aqueduct 500
Pecan Bayou 2,475
Total 2,975
3. Net annual P accumulation - 5,540 kg.
* Estimate based on 575 lakeshore dwellings, 2 campgrounds, and 1 park;
see Working Paper No. 175.
** See Working Paper No. 175.
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12
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Pecan Bayou 88,985 37.8
Jim Ned Creek 74,065 31.4
b. Minor tributaries & immediate
drainage (non-point load) - 34,395 14.6
c. Known municipal STP's --None
d. Septic tanks* - 6,305 2.7
e. Known industrial - None
f. Direct precipitation** - 31,890 13.5
Total 235,640 100.0
2. Outputs -
Lake outlet - Brownwood Aqueduct 12,865
Pecan Bayou 73,050
Total 85,915
3. Net annual N accumulation - 149,725 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/ktn2/yr
Pecan Bayou 1 55
Jim Ned Creek 3 45
* Estimate based on 575 lakeshore dwellings, 2 campgrounds, and 1 park;
see Working Paper No. 175.
** See Working Paper No. 175.
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13
E. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P Mean Total N
Tributary Cone, (mg/1) Cone, (mg/1)
Hog Creek 0.063 1.122
Rough Branch 0.021 1.014
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/m2/yr 0.29 0.19 8.0 5.1
Vollenweider phosphorus loadings
(g/tn2/yr) based on mean depth and mean
hydraulic retention time of Lake Brownwood:
"Dangerous" (eutrophic loading) 0.40
"Permissible" (oligotrophic loading) 0.20
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14
V. LITERATURE REVIEWED
Latchford, John B. Jr., 1974. Personal communication (lake mor-
phometry). TX Water Qual. Bd., Austin.
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.
Yost, I. D., 1976. Personal communication (estimate of evaporation
at Brownwood Reservoir). U.S. Geol. Surv., Austin.
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VI. APPENDICES
15
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE USED IW RANKINGS
LAKE
CODE LAKE SAME
4801 AMISTAD LAKE
4802 8ASTROP LAKE5
4803 BELTON RESERVOIR
4804 BRAUNIG LAKE
4805 BROWNWOOD 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 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
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
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 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 OWTriO 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
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
4839 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 BUTTES 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
1NOHG 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 5EC
473. 833
482.714
406.250
46b.4l7
478.500
451.321
389.913
479.500
454.917
434.500
430.500
MEAN
CHLORA
24.491
18.457
J.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 OrtT'rlO P
0.01 j
0.012
0.010
0.013
0.030
0.018
0.007
0.240
0.009
0.009
0.008
-------
PERCENT OF LAKES WilH HIGHER VALUES (NUMBER Of- LAKES Hit* HIGHEK VALUES)
LAKE
CODE LAKE NAME
4801 AMISTAO LAKE
480? BASTROP LAKE
4803 8ELTON RESERVOIR
4804 BRAUNIG LAKE
4805 BROHNWOOD LAKE
4806 LAKE BUCHANAN
4807 CADDO LAKE
4808 CALAVERAS LAKE
4809 CANYON RESERVOIR
48io 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 B JOHNSON LAKE
4822 MEDINA LAKE
4823 LAKE MEREDITH
4824 PALESTINE LAKE
4825 POSSUM KINGDOM RESERVOIR
4826 SAN ANOELO 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)
( 1)
( 14)
« 37)
( 3D
( 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)
( 38)
( 3)
( 28)
( 18)
( 31)
( 33)
( 25)
( 5)
( 22)
( 6)
( 28)
( 11)
t 1)
( 4)
( 0)
( 33)
( 12)
< 33)
( 17)
( 15)
( 31)
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)
( 31)
( 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
CHLOrIA
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)
15-
MIN DO
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
OISS OxThO 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)
31)
2)
31)
14)
10)
34)
37)
14)
3)
21)
28)
6)
7)
34)
4)
17)
7)
1)
10)
38)
21)
19)
21) .
17)
21)
28)
INDEX
NO
40<;
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 RESEKV
4832 TAWAKONI LAKE
4833 TEXARKANA LAKE
4834 TEXOMA LAKE
4835 TRAVIS LAKE
4836 TH1NIOAD
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)
t 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 <
67 (
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)
1S-
MIN 00
67
82
17
63
72
17
17
92
49
17
17
( 25)
< 31)
( 0)
( 24)
< 27)
( 0)
( 0)
( 35)
< 17)
( 0)
( 0>
MEDIAN
DISS o*rrio H
30 (
39 (
51 <
30 (
13 (
21 (
84 (
0 (
63 (
63 (
76 (
10)
14)
19)
10)
5)
7)
31)
0)
21)
21)
28)
INDEX
NO
20«
259
372
253
176
217
J84
169
311
390
357
-------
l_A
-------
LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
29 4821 LYNDON B JOHNSON LAKE 238
30 4834 TEXOMA LAKE 217
31 4829 SOMERVILLE 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 CRIST! 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
-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 FLO* INFORMATION FOR
03/16/76
LA*E CODE
6SOWNWOOD
TOTAL DRAINAGE AREA OF I_AKE(SO KM)
SUB-DRAINAGE
TRIBUTARY APEAISQ KM)
JAN
FEB
3975.6
MAR
APR
MAr
NORMALIZED r'LOWS(CMS)
JON JUL AU6
SEP
OCT
NOV
UtIC
MEAN
4805A1
4805A2
4805B1
4605C1
480SZZ
3975.6
1623.9
0.0
1634.3
717.4
6.070
1.00
0.45
1.10
0.48
1.246
0.93
0.51
0.93
0.42
5.040
1.33
0.62
1.39
0.59
2.407
3.74
O.B2
3.82
1.67
7.929
' 5.32
0.68
5.41
2.35
3.766
2.49
0.93
2.52
1.10
0.198
2.01
1.27
2.04
0.88
0.085
0.79
1.25
0.79
0.34
0.085
2.55
0.85
2.55
1.13
4.304
2.27
0.65
2.2*
0.99
0.340
0.7u
O.bl
0.7t
0.31
0.934
0.74
0.45
0.76
0.34
2.894
2.00
0.75
2.03
0.89
TOTAL DRAINAGE AREA OF LAKE = 3975.6
SUM OF SUB-DRAINAGE AREAS = 3975.6
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR
4805A1
MEAN FLOW DAY
FLOW DAY
4805A2
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
1.133
19.822
19.822
1.416
1.416
14.158
1.416
1.98?
4.531
1.982
0.142
0.057
33.980
42.475
18.406
2.832
2.832
8.495
0.708
0.850
1.699
0.425
0.142
0.003
7
5
2
7
4
1
1
5
5
7
26
16
7
5
2
7
4
1
1
5
5
7
26
16
0.003
4.248
113.267
1.982
1.416
28.317
2.549
0.142
0.283
2.549
0.142
0.0
0.0
6.796
39.644
2.265
2.265
28.317
1.133
0.283
0.311
0.510
0.085
0.0
21
17
21
17
SUMMARY
TOTAL FLOW IN = 67.96
TOTAL FLOW OUT = 34.40
FLOW DAY
FLOW
0.850
5.663
0.453
1.133
-------
TRIBUTARY TLOK INFORMATION FOR
03/16/76
LAKE CODE '•SOS o^OWNWOOO
MEAN MONTHLY FLOrfS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH
4«05dl
4805C1
4805ZZ
9
10
11
12
1
2
3
i*
5
6
7
8
9
10
11
12
1
2
3
it
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
MEAN FLOW OAY
FLOW DAY
FLOW OftY
FLO*
0.453
0.340
0.425
0.538
0.566
0.566
0.453
0.481
0.660
0.963
1.076
1.133
7.079
14.158
11.327
1.133
1.133
5.097
0.566
0.14?
0.142
0.057
0.014
0.0
8.495
16.990
4.248
0.850
0.850
2.832
0.227
0.057
0.057
0.023
0.006
0.0
7
5
2
7
4
1
1
5
5
7
26
16
7
5
2
7
4
1
1
5
5
7
26
16
0.566
0.233
0.481
0.566
0.623
0.566
0.481
0.708
0.793
0.595
0.934
1.076
0.0
7.079
36.812
1.416
1.416
4.248
1.133
0.014
0.006
0.028
0.0
0.0
21
17
21
17
0.538
0.623
0.085
0.057
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/02/1!
480501
31 50 20.0 099 00
BROVrNwOOD LAKE
48049 TE'"\S
16.0
DATE
FROM
TO
74/03/07
74/05/16
74/08/06
74/10/29
TIME
OF
DAY
16
16
16
16
16
11
11
11
11
11
13
13
13
13
14
14
14
14
14
30
30
30
30
30
00
00
00
00
00
50
50
50
50
45
45
45
45
45
DE°TH
FEET
0000
0005
0015
0030
0046
0000
0005
0015
0035
0041
0000
0015
0030
0055
0000
0005
0015
0032
0048
00010
WATER
TEMP
CENT
14.7
14.3
13.1
12.6
11.7
24.6
24.7
24.3
21.5
21.3
26.3
26.2
26.0
25.5
19.3
19.3
19.0
18.8
18.5
11EPALES
00300
DO
MG/L
10.1
9.4
9.4
9.3
7.2
4.4
4.4
4.0
1.8
0.6
7.4
7.4
6.8
2.6
00077
TR4NSP
SECCHI
INCHES
60
35
60
36
00094
CNOUCTVY
FIELD
MICROMHO
495
500
485
500
470
634
695
688
672
677
698
694
699
699
418
420
416
406
372
3
00400
PH
su
8.30
6.30
8.20
8.20
8.20
«. 30
H. 30
8.20
7.90
7.90
8.00
7.70
7.70
7.70
8.15
8.10
8.05
7.95
7.75
00410
T ALK
CAC03
MG/L
123
121
122
123
123
119
118
119
121
122
121
119
127
132
103
101
102
100
101
211
0051
00610
NH3-N
TOTAL
MG/L
0.040
0.030
0.030
0.030
0.040
0.040
0.030
0.030
0.060
0.060
0.050
0.040
0.040
0.130
0.040
0.040
0.040
0.060
0.100
1202
FEET OE
00625
TOT KJEL
N
MG/L
0.700
0.400
0.300
0.300
0.400
0.500
0.300
0.400
0.400
0.300
0.800
0.300
0.200
0.300
0.500
0.500
0.400
0.400
0.400
00630 00671
N02J.N03 PriOS-OIS
N-TOTAL ORTHO
MG/L MG/L P
0.060
0.070
0.070
0.070
0.090
0.060
0.040
0.030
0.080
0.060
0.020
0.020
0.020K
0.020K
0.090
0.090
0.090
0.130
0.200
0.012
0.007
0.004
0.004
0.006
0.006
0.007
0.008
0.010
0.008
0.011
0.007
0.009
0.007
0.008
0.008
0.008
0.013
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/02.'11
460501
31 50 20.0 099 00 16.0
B«0*N*OOD _AKE
46049 TEXAS
llEPAcES
3
2111202
0051 FEET DEPTH
DATE
FROM
TO
74/03/07
74/05/16
74/08/06
74/10/29
TIME
OF
DAY
16
16
16
16
16
11
11
11
11
11
13
13
13
13
14
14
14
14
14
30
30
30
30
30
00
00
00
00
00
50
50
50
50
45
45
45
45
45
DEPTH
FEET
0000
0005
0015
0030
0046
0000
0005
001S
0035
0041
0000
0015
0030
0055
0000
0005
0015
0032
0048
00665 32217 00031
PHOS-TOT CHLRPHYL INGOT CT
A REMNING
MG/U P UG/L PERCENT
0.022 0.7
0.013
0.013
0.010
0.027
0.027 2.2
0.021
0.021
0.036
0.037
0.021 6.1
0.014
0.015
0.034
0.030 6.5
0.032
0.027
0.031
0.061
-------
STORE! RETRIEVAL DATE 76/02/H
480502
31 49 42.0 099 03 05.0
8HOWNWOOO LAKE
48049 TEV%S
DATE
FROM
TO
74/03/07
74/05/16
74/08/06
74/10/29
00010
TIME DEPTH *ATER
OF TEMP
DAY FEET
17
17
17
11
11
11
11
14
14
14
14
14
14
14
14
20
20
20
15
15
15
15
30
30
30
30
20
20
20
20
0000
0005
0020
0000
0005
0015
0020
0000
0005
0010
0018
0000
0005
0015
0027
CENT
15,
15,
13,
24,
24,
24,
24,
26.
26,
26.
26.
19.
19.
19.
19.
,1
.0
.6
,7
,6
.3
.1
.5
.2
,1
.0
,4
,3
,3
,0
00300
DO
MG/L
9
9
7
7
7
6
6
6
6
6
6
6
6
•
•
•
*
•
•
•
•
•
•
•
•
•
7
7
0
0
0
8
4
6
4
2
4
2
2
11EPALES
00300
00
MG/L
9.7
9.7
7.0
7.0
7.0
6.8
6.4
6.6
6.4
6.2
6.4
6.2
6.2
00077
TRANSP
SECCMI
INCHES
48
29
24
24
00094
CNDUCTVY
FIELD
MICROMHO
500
500
485
632
633
626
625
695
696
694
692
415
416
415
410
3
00400
PH
su
e.4o
8.30
8.20
8.30
8.25
8.20
8.20
8.10
8.10
8.10
8.15
8.15
8.10
8.10
8.05
00410
T ALK
CAC03
MG/L
125
125
125
123
120
119
120
121
121
123
120
104
106
103
104
2111202
0024
00610
NH3-N
TOTAL
MG/L
0.040
0.020
0.030
0.030
0.040
0.060
0.030
0.030
0.030
0.020
0.020
0.090
0.090
0.090
0.080
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.400
0.300
0.300
0.500
0.300
0.600
0.300
0.300
0.300
0.300
0.200
0.600
0.600
0.600
0.600
00630
N02&N03
N-TOTAL
MG/L
0.070
0.060
0.080
0.040
0.040
0.060
0.040
0.020K
0.020K
0.020K
0.020K
0.080
0.090
0.080
0.080
00671
PHOS-OIS
ORTHO
MG/L P
0.010
O.OOS
0.004
0.006
0.006
0.009
0.006
0.004
0.004
0.002
0.005
0.012
0.01S
0.014
0.011
DATE
FROM
TO
74/03/07
74/05/16
74/08/06
74/10/29
TIME DEPTH
OF
DAY FEET
17 20 0000
17 20 0005
17 20 0020
11 15 0000
11 15 0005
11 15 0015
11 15 0020
14 30 0000
14 30 0005
14 30 0010
14 30 0013
14 20 0000
14 20 0003
14 20 0005
14 ?0 0015
,14 20 0027
00665
PHOS-TOT
MG/L P
0.013
0.016
0.024
0.023
0.021
0.034
0.02*
0.019
0.020
0.020
0.028
0.036
0.039
0.039
0.040
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
0.6
1.4
10.6
3.8
5.0
1.0
K VALUE KNOWN TO 8E
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/02/U
480503
31 50 05.0 099 05 58.0
BrtOwNrfOOO I '.KE
4d049 TEXAS
DATE
FROM
TO
74/03/08
74/05/16
74/08/06
74/10/29
TIME DEPTH
OF
DAY FEET
09 20 0000
09 20 0007
11 25 0000
11 ?5 0005
11 25 0009
15 05 0000
15 05 OOOS
14 00 0000
14 00 0005
14 00 0010
00010
WATER
TEMP
CENT
18.1
17.6
25.9
25.8
25.5
25.0
24.3
18.6
18.6
18.4
11EPALES
00300
DO
MG/L
8.1
6.2
6.2
6.0
5.8
6.0
00077
TRANSP
SECCHI
INCHES
18
5
11
12
00094
CNOUCTVY
FIELD
MICROMHO
548
542
634
634
630
681
669
312
322
318
3
00400
PH
SU
8.30
8.20
8.20
8.10
8.10
8.30
8.20
8.05
8.00
00410
T ALK
CAC03
MG/L
129
131
117
118
119
122
125
105
104
211
0011
00610
NH3-N
TOTAL
MG/L
0.040
0.040
0.060
0.060
0.050
0.020
0.040
0.090
0.080
1202
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.600
0.600
0.900
0.800
0.800
0.400
0.300
0.800
0.700
00630
N02«»N03
N-TOTAL
MG/L
0.050
0.080
0.080
0.080
0.060
0.020K
0.020
0.140
0.130
00671
PriOS-UIS
ORTriO
MG/L P
0.015
0.005
0.007
0.009
0.008
0.005
0.004
0.029
0.032
DATE
FROM
TO
74/03/08
74/05/16
74/08/06
74/10/29
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
09
09
11
11
11
15
15
14
14
14
14
20
20
25
25
25
05
05
00
00
00
00
0000
0007
0000
0005
0009
0000
0005
0000
0001
0002
0005
MG/L P UG/L PERCENT
0
0
0
0
0
0
0
0
0
.042 2.2
.071
.079 4.6
.083
.076
.058 12.9
.074
.079 8.8
.080
5.0
1*0
K VALUE KNOWN TO 8E
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE ?
490504
31 52 00.0 099 01 19.0
46049 TEXAS
DATE
FROM
TO
74/03/08
74/05/16
74/08/06
74/10/29
TIME
OF
DAY
10 00
10 00
10 00
12 00
12 00
12 00
09 40
09 40
09 40
15 10
15 10
15 10
15 10
15 10
15 10
DEPTH
FEET
0000
0005
0017
0000
0005
0017
0000
0010
0019
0000
0005
0015
0017
0024
0030
00010
WATER
TEMP
CENT
16.2
16.2
16.0
25.4
25.3
25.3
26.1
26.2
26.2
19.4
19.4
19.4
19.4
19.0
18.9
00300 00077 00094
DO TRANSP CNOUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
8.8
9.3
7.6
7.2
6.0
6.0
5.8
7.0
7.0
7.4
6.8
30
25
27
30
520
519
512
655
653
650
691
688
688
412
413
414
413
409
410
11EPALES
3
00400
PH
SU
8.20
8.25
8.25
8.30
8.30
8.30
8.10
8.05
8. OS
8.15
8.10
8.10
00410
T ALK
CAC03
MG/L
127
127
127
120
121
119
116
116
117
99
97
98
2111203
0021
00610
NH3-N
TOTAL
MG/L
0.030
0.020
0.020
0.040
0.020
0.030
0.070
0.050
0.040
0.060
0.060
0.060
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.600
0.500
0.400
0.700
0.500
0.500
0.500
0.300
0.400
0.400
0.400
0.400
00630
N02&N03
N-TOTAL
MG/L
0.050
0.050
0.050
0.040
0.030
0.040
0.060
0.030
0.020
0.060
0.060
0.050
00671
PHOS-OIS
ORTHO
MG/L P
0.008
0.004
0.006
0.005
0.005
0.005
0.013
0.006
0.006
0.012
0.021
0.019
8.00
99
0.070
0.400
0.050
0.021
DATE
FROM
TO
74/03/08
74/05/16
74/08/06
74/10/29
00665 32217 00031
TIME DEPTH PMOS-TOT CHLRPHYL INCOT LT
OF A REMNING
DAY FEET
10
10
10
12
12
12
09
09
09
15
15
15
15
15
00
00
00
00
00
00
40
40
40
10
10
10
10
10
0000
0005
0017
0000
0005
0017
0000
0010
0019
0000
0003
0005
0015
0030
MG/L P UG/L • PERCENT
0.029 1.0
0.024
0.023
0.022 4.7
0.019
0.017
0.038 7.5
0.024
0.017
0.035 4.6
0.036
0.035
0.037
5.0
1.0
-------
APPENDIX E
TRIBUTARY DATA
-------
STORE1 REVRIEVAL DATE 76/03/10
DATE TIME DEPTH N02J.N03
FROM OF
TO DAY FEET
74/09/07
74/10/05
74/12/07
75/03/01
75/04/05
75/04/21
75/05/17
75/06/07
75/07/26
10
11
10
10
11
15
11
14
11
30
40
00
00
35
30
05
30
30
43Q5A1
31 50 20.0 099 00 06.0 4
PECAN bAlT J
46029 f.5 OWENS
0/dROwNWOOO L4KE
BANK SAMPLE 1000 FT DOWNSTREAM FRUM DAM
11EPALES 211120'*
0000 FEET DE°TH CLASS 00
0630
!t,N03
OTAL
IG/L
0.028
0.272
0.152
0.075
0.065
0.065
0.030
0.012
0.010
00625
TOT KJEL
N
MG/L
0.850
0.800
0.500
0.650
0.750
0.400
0.400
0.700
0.750
00610
NH3-N
TOTAL
MG/L
0.040
0.015
0.028
0.043
0.040
0.030
0.020
0.032
0.020
00671
PnOS-DIS
ORTHO
MG/L P
0.005
0.020
0.025
0.005
0.005K
0.010
0.005K
0.005K
0.005
00665
PHOS-TOT
MG/L P
0.040
0.090
0.030
0.020
0.020
0.020
0.010K
0.010K
0.040
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
SlCMtT RETRIEVAL DATE 76/03/10
DATE TIME DEPTH N02&N03
FKOM OF
TO DAY FEET
74/10/05
74/11/02
74/12/07
75/01/04
75/02/01
75/03/01
75/04/05
75/05/05
75/05/17
75/07/26
10 15
10 30
10 40
10 00
10 30
10 00
10 00
15 30
09 40
09 45
31 57 12.0 099 03 55.0 4
PECAN BAYC.,
48 7.5 BrrtDb
T/dRO*N*000 LAKE
BANK SAMPLE OFF SEC RD 1.7 Ml Nri OF BYriD
11EPALES 2111204
COOO FEET DEPTH CLASS 00
Ob30
'J.N03
OTAL
IG/L
0.104
0.136
0.384
0.400
0.271
0.330
O.OttS
0.015
0.145
0.290
00625
TOT KJEL
N
MG/L
0.800
1.000
0.800
0.500
4.000
0.850
0.650
0.650
0.750
2.100
00610
NH3-N
TOTAL
MG/L
0.005
0.035
0.016
0.016
0.072
0.030
0.045
0.020
0.030
0.105
00671
PHOS-DIS
OP.THO
MG/L P
0.010
0.010
0.018
0.005
0.032
0.005
0.005K
0.010
0.010
0.015
00665
PriOS-TOT
MG/L P
0.060
0.020
0.020
0.020
0.020
0.020
0.040
0.050
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE. 76/03/10
430Sdl
31 49 40.0 099 00 06.0 4
dROWNrfOOO wQUEOUCT
46 7.b OrftNS
0/bRO*fJ*OOD LAKE
SEC RJ 212i> BRDG
11EPALES
0000 FEET DEPTH
MI E OF SEC RO 2632
211120'+
CLASS 00
DATE
FROM
TO
74/09/07
74/10/05
74/11/02
74/12/07
75/01/04
75/02/01
75/03/01
75/04/05
75/04/21
75/05/05
75/05/17
75/06/07
75/07/26
TIME i
OF
DAY 1
10 50
11 00
10 00
10 20
10 00
10 00
09 00
11 15
15 00
16 30
10 50
15 15
11 00
FEET
00b30
N02&N03
N-TOTAL
MG/L
0.012
0.176
0.216
0.176
0.136
0.088
0.080
0.070
0.055
0.035
0.035
0.005
0.005
00625
TOT KJEL
N
MG/L
0.600
1.000
0.500
0.800
0.600
0.900
0.500
0.600
0.350
0.500
0.550
0.450
0.400
00610
NH3-N
TOTAL
MG/L
0.020
0.015
0.050
0.024
0.024
0.032
0.020
0.025
0.040
0.020
0.030
0.010
0.020
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.015
0.015
0.020
0.005
0.008K
0.005K
0.005K
0.005
0.005
0.005K
0.005K
0.005
00665
PHOS-TOT
MG/L P
0.025K
0.045
0.040
0.030
0.020
0.020
0.010
0.020
0.020
0.010K
0.010K
0.010K
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STOKET RETRIEVAL LJATE 76/OJ/10
00630
DATE TIME DEPTH N02&N03
FROM OF N-TOTAL
TO DAY FEET MG/L
74/10/05
74/11/02
74/12/07
75/01/04
75/02/01
75/03/01
75/04/05
75/04/21
75/05/05
75/05/17
75/06/07
75/07/26
10 00
09 45
13 00
09 30
09 30
09 35
10 45
14 30
16 00
10 15
1<» 15
10 30
0.016
0.104
0.160
0.528
0.384
0.375
0.005
0.010
0.005
0.200
0.020
0.165
0.600
0.600
1.300
1.000
1.400
0.850
0.700
0.525
0.800
0.650
1.100
0.775
40OSC1
31 51 15.0 099 11 50.0 4
JIM NED OtEK
48 7.5 THKIFTY
T/8«0*INWOOQ LAKE
AT BLACKWlLL XING 1.8 M S* FAIRVIE* CMTY
11EPALES 2111204
0000 FEET DEPTh CLASS 00
0
00625
TOT KJEL
N
MG/L
00610
NH3-N
TOTAL
MG/L
00671
PHOS-OIS
ORTHO
MG/L P
00665
PHOS-TOT
MG/L P
0.010
0.050
0.096
0.032
0.072
0.025
0.025
0.030
0.015
0.040
0.020
0.025
0.005
0.015
0.050
0.080
0.072
0.045
0.010
0.010
0.015
0.040
0.010
0.020
0.040
0.130
0.060
0.110
0.100
0.010
0.070
0.040
0.100
0.090
0.140
-------
STQRET
-,AL DATE 76/03/10
480501
31 55 25.0 099 02 10.0
HOG CHEEK
48 7.5 BrRDS
T/3ROrfNWOOD LAKE
SEC RD 227j BRDG .5 MI
11EPALES
0000 FEET DEPTH
E OF SEC RD 2259
2111204
CLASS 00
DATE t
FROM
TO \Jt
74/12/07 ii j5
75/02/01 If, 15
75/04/21 I, 10
75/05/05 1<; ,0
75/05/17 0'« ?0
75/06/07 1| ^5
75/07/26 Ov oo
DEPTH
00630
N02S.N03
N-TOTAL
MG/L
0.008
0.064
0.005
0.005
0.005
0.010
0.010
00625
TOT KJEL
N
MG/L
0.700
1.700
0.600
1.550
0.900
1.550
0.750
00610
NH3-N
TOTAL
MG/L
0.024
0.040
0.030
0.020
0.017
0.025
0.050
00671
PHOS-DIS
ORTHO
MG/L P
0.035
0.032
0.005K
0.030
0.011
0.015
0.015
00665
PriOS-TOT
MG/L P
0.040
0.040
0.100
0.050
0.090
0.060
rcoT TO 8E
LESS THAN INDICATED
-------
STOHEf KETKItVAL &ATt 76/23/10
31 55 10oO 099 00 30,0 4
ROuoh BRANCH
48 7o5 6Y"US
T/b^GoMriOCin LAKE
bEC PO 327., rrfGG 2.5 M a OF SEC HD 225S
HEPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROH
TO
74/10/05
74/11/02
74/12/07
75/01/04
75/02/01
75/03/01
75/04/05
75/05/05
75/05/17
TIME DEPTH
OF
DAY FEET
09 50
10 00
10 00
09 40
09 45
09 50
09 30
15 00
09 15
00630
N02&N03
N-TOTAL
MG/L
0.024
0.016
0,008
0.040
0.096
0.015
0.005
0.015
0,005
00625
TOT KJEL
N
MG/L
0.500
0.400
0.800
0.700
2,200
0.500
0.750
2.700
0.350
00610
NH3-N '
TOTAL
MG/L
OoOlO
0 = 020
0.016
0.016
0.032
0.025
0.030
0.065
0.010
00671
PHOS-DIS
OkTHO
MG/L P
OoOOSK
OoOlS
0,005
0.010
0.032
OoOOSK
0.005K
0.020
0.005
00665
PHOS-TOT
MG/L P
Oo020
OoOSO
OoOlOK
OoOlO
0 = 010
OoOlO
0.035
0,020
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |