U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
E, V, SPENCE RESERVOIR
COKE COUNTY
TEXAS
EPA REGION VI
WORKING PAPER No, G53
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
E, V, SPENCE RESERVOIR
COKE COUNTY
TEXAS
EPA REGION VI
WORKING PAPER No, 658
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 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)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.
-------
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.
Majo'r 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
•
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
Coma!
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
Somervi1le
E. V. Spence
Stamford
Stillhouse Hollow
Tawakoni
Texoma
Travis
Trinidad
Twin Buttes
White River
Whitney
Wright Patman (Texarkana)
Burnet, Llano
Bandera, Medina
Hutchinson, Moore,
Potter
Tom Green
Anderson, Cherokee,
Henderson, Smith
Palo Pinto, Stephens,
Young
Angelina, Jasper.
Nacogdoches, Sabine, San
Augustine
Burleson, Lee, Washington
Coke
Haskell
Bell
Hunt, Rains, Van Zandt
Cooke, Grayson TX; Bryan,
Johnston, Love, Marshall, OK
Burnet, Travis
Henderson
Tom Green
Crosby
Bosque, Hill
Bowie, Cass
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— 32'30'
V
101' 30'
Texas
Lake
J.B. Thomas
L%
101'00'
./
u
100'30'
icqi
Map Location
i Natural
\Darn
.Lake
Red
Lake
•• V
Buford /
•
Colorado (City .•
-
• Fairview
Sand • Coahoma
Springs
Beafe.
la tan
"\
Big Spring
Westbrook •Colorado
City
da,,, x. rf- £^..
Champion Creek .
'.Spade X*"7 Reservoir |
'\0 C -^ /'
Silver
EVSPENCE
;
'RESERVOIR
am
M Robert
'Lee
t .—I Colorado
J River
-------
E. V. SPENCE RESERVOIR
STORE! NO. 4828
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that E. V. Spence 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.
E. V. Spence Reservoir ranked eighteenth in overall trophic
quality when the 39 Texas reservoirs sampled in 1974 were compared
using a combination of six parameters*. Eighteen of the reservoirs
had less and one had the same median total phosphorus, eight had
less and two had the same median dissolved phosphorus, six had less
and one had the same median inorganic nitrogen, 19 had less mean
chlorophyll a^, and 21 had greater mean Secchi disc transparency.
Marked depression or depletion of dissolved oxygen with depth
occurred at stations 1 and 2 in August.
Survey limnologists observed an algal bloom and rooted aquatic
plants along the shoreline in August. Blue-green algae were dom-
inant in the August and October phytoplankton samples.
* See Appendix A.
-------
B. Rate-Limiting Nutrient:
Because of significant Tosses of phosphorus in both algal
assay samples between times of collection and the beginning of
the assays, the results are not representative of conditions in
/
the reservoir at the times the samples were taken (03/04/74 and
10/29/74).
The reservoir data indicate that phosphorus was the limiting
nutrient at all stations in May and at station 3 in October, and
nitrogen was limiting at all stations in March and at stations 1
and 2 in October.
C. Nutrient Controllability:
1. Point sources—No known point sources impacted E. V. Spence
Reservoir during the sampling year.
The present phosphorus loading of 0.55 g/m2/yr is more than
twice that proposed by Vollenweider (Vollenweider and Dillon, 1974)
as a eutrophic loading (see page 13). If Vol|enweider's eutrophic
level is applicable to Texas reservoirs, it is likely that the
trophic quality of the reservoir will deteriorate unless the present
phosphorus loading is reduced. However, Survey data indicate that
all the phosphorus inputs are from non-point sources, arid it is
questionable whether such inputs can be controlled.
-------
2. Non-point sources--Non-point sources contributed 100%
of the phosphorus load to E. V. Spence Reservoir during the
sampling year. The Colorado River added 94.0% of the total
load, Paint Creek, 0.4%; and the ungaged tributaries were
estimated to have contributed 2.4%.
The phosphorus -export rates of the Colorado River and Paint
Creek were 0.3 and 0.8 kg/km2/yr, respectively. These rates are
quite low compared to the rates of unimpacted tributaries of
other reservoirs in the general area.
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II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"
tt
A. Morphometry :
1. Surface area: 25.62 kilometers2.
2. Mean depth: 6.7 meters.
3. Maximum depth: >15.8 meters.
4. Volume: 171.654 x 106 m3.
5. Mean hydraulic retention time: 7.1 years (based on outflow).
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/s_ec)*
Colorado River 40,124.3 1.830
Paint Creek 67.6 0.033
Minor tributaries &
immediate drainage - 549.1 0.196
Totals 40,741.0 2.059
2. Outlet -
Municipal and irrigation diversion 0.0 0.710
Colorado Ri.ver 40,766.6 Q.052
Totals 40,766.6** 0.762**
C. Precipitation***:
1. Year of sampling: 63.4 centimeters.
2. Mean annual: 48.3 centimeters.
t Table of metric conversions—Appendix B.
tt Ivie, 1976.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of reservoir; lesser outflow due to evaporation (Ivie, op. cit)
*** See Working Paper No. 175.
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III. WATER QUALITY SUMMARY
E. V. Spence 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 and last 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 15.8 meters at station 1, 9.4 meters at
station 2, and 6.7 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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A. SUMMARY OF PHYSICAL AND
CHEMICAL CHARACTERISTICS FOR E V SPENCE RESERVOIR
STORET CODE 4828
1ST SAMPLING ( 3/ 4/74)
3 SITES
2ND SAMPLING ( 5/15/74)
3 SITES
3RO SAMPLING ( 8/ 5/74)
3 SITES
PARAMETER
TEMP (C)
DISS OXY
CNDCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P
ORTHO P (MG/L)
N02+N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UG/L)
SECCHI (METERS)
RANGE
11.1 - 14.1
9.6 - 10.4
1614. - 1785.
8.2 - 8.4
135. - 154.
0.014 - 0.027
0.006 - 0.010
0.030 - 0.040
0.020 - 0.040
0.400 - 0.700
0.050 - 0.080
0.440 - 0.730
4.7 - 5.9
0.7 - 0.9
MEAN
12.3
9.9
1692.
8.3
145.
0.018
0.008
0.032
0.028
0.555
0.060
0.586
5.3
0.8
MEDIAN
13.1
9.9
1705.
8.3
148.
0.017
0.008
0.030
0.030
0.600
0.060
0.630
5.4
0.8
RANGE
21.4
5.2
2155.
8.0
133.
0.027
0.005
0.020
0.030
0.400
0.050
0.420
3.4
0.4
- 23.9
7.8
- 2340.
8.3
- 138.
- 0.045
- 0.011
- 0.080
- 0.110
- 0.800
- 0.190
- 0.880
6.2
1.1
MEAN
23.2
7.0
2264.
8.2
135.
0.036
0.006
0.063
0.064
0.567
0,127
0.630
4.7
0.7
MEDIAN
23.3
7.0
2247.
8.2
136.
0.036
0.006
0.075
0.070
0.500
0.145
0.580
4.5
0.7
RANGE
24.6
0.0
2610.
7.7
««»»««
««««»*
»»»»««
••*""*
«»»»««
......
..«««»
ia.4
0.9
- 25.5
6.8
- 2703.
8.1
MEAN
25.3
5.4
2675.
8.0
MEDIAN
25.4
6.2
2683.
8.0
—««•«».»»««•»»*»««*«»««
_«««»«.«««««»«»««««*»««
.««....»..«.«*«......».
>.«»»«««<
nnnntoo
—«..««.»..««..«...«.».«
>...«»«. 4
»«.««««
..........a....*.......
- 16.9
- 1.8
*•<
14*2
1.4
>.«»»«»
13.4
1.4
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A. SUMMARY OF PHYSICAL AND CHEMICAL CrIARACTEK1STICS FOR £ V SPENCE RESERvOIR
STOkET CODE 4628
4TH SAMPLING < 10/29/74)
PARAMETER
TEMP
DISS OXY (MG/L)
CNDCTVY (MCKOMOI
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UG/L)
SECCHI (METERS)
RANGE
17.9 -
6.8 -
1303. - 1686.
8.2 -
98. -
0.036 - 0.074
0.008 - 0.023
0.020 - 0.250
0.030 - 0.090
0.600 - 1.000
0.070 - 0.280
0.620 - 1.150
19.7 - 24.8
0.6 -
3 SITES
MEAN
3
4
i .
5
4
3
'0
'0
0
iO
'0
8
1
18.7
7.1
1529.
8.4
104.
0.050
0.012
0.034
0.056
0.700
0.140
0.784
22.8
0.9
MEDIAN
18.7
7.2
1657.
8.4
105.
0.040
0.010
0.020
0.050
0.700
0.090
0.720
24.0
0.9
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8
B. Biological characteristics:
1. Phytoplankton* -
Sampling
Date
03/04/74
08/05/74
10/29/74
Dominant
Genera
1.
2.
3.
4.
5.
Tetraedron sp.
Scenedesmus sp.
Cryptomonas sp.
Ch'roomohas sp.
Synedra sp.
Other genera
Total
1. Oscillatoria sp.
2. Raphidiopsis sp.
3. Lyngbya sp.
4. DactyTococcdpsis sp.
5. Tetraedron sp.
Other genera
Total
1. Oscillatoria sp.
2. Dactylococcopsis sp.
3. Tetraedron sp.
4. Raphidiopsis sp.
5. Oocystis sp.
Other genera
Total
Algal Units
per ml
2,407
2,295
263
226
188
414
5,793
13,345
5,537
3,691
2,343
2,130
2.626
29,672
13,268
6,761
1,732
887
507
2,958
26,113
The May phytoplankton sample was lost in shipment.
-------
2. Chlorophyll a^ -
Sampling Station Chlorophyll
Date Number (yg/1)
03/04/74 1 4.7
2 5.4
3 5.9
05/15/74 1 3.4
2 4.5
3 . 6.2
08/05/74 1 12.4
2 13.4
3 16.9
10/29/74 1 19.7
2 24.0
3 24.8
C. Limiting Nutrient Study:
There was a significant loss of phosphorus in both algal
assay samples between time of collection and the beginning of
the assays. Therefore, the algal assay results are not repre-
sentative of conditions in the reservoir at the times the sam-
ples were taken (03/04/74 and 10/29/74).
The reservoir data indicate nitrogen limitation at all sta-
tions in March and at stations 1 and 2 in October; i.e., the mean
inorganic nitrogen/orthophosphorus ratios were 9/1 or less.
All stations were limited by phosphorus in May, as was station
3 in October; i.e., the mean N/P ratios were 17 to 1 or greater,
and phosphorus limitation would be expected.
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10
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the deteYmi nation 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 months
of April and Hay 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 lake.
In this report, nutrient loads for sampled tributaries were
calculated using mean annual concentrations and mean annual flows.
t
The outlet and diversion loads were calculated using mean reservoir
concentrations at station 1 and the mean annual, outlet and diversion
flows.
Nutrient loads for unsampled "minor tributaries and immediate
drainage" ("ZZ" of U.S.G.S.) were estimated us-ing the mean concen-
trations in Paint Creek at station B-l and the mean annual ZZ flow.
No known point sources impacted E. V. Spence Reservoir 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) -
Colorado River 13,275 94.0
Paint Creek 55 0.4
b. Minor tributaries & immediate
drainage (non-point load) - 340 2.4
c. Known municipal STP's - None
d. Septic tanks - None*
e. Known industrial - None
f. Direct precipitation** - 450 3.2
Total 14,120 100.0
2. Outputs -
Lake outlet - Diversions 670
Colorado River 50
Total 720
3. Net annual P accumulation - 13,400 kg.
* I vie, 1976.
** 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) -
Colorado River 83,565 70.4
Paint Creek 1,070 0.9
b. Minor tributaries & immediate
drainage (non-point load) - 6,365 5.4
c. Known municipal STP's - None
d. Septic tanks - None*
e. Known industrial - None
f. Direct precipitation** - 27,660 23.3
Total 118,660 100.0
2. Outputs -
Lake outlet - Diversions 13,925
Colorado River 1,020
Total 14,945
3. Net annual N accumulation - 103,715 kg.
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Colorado River 0.3 2.1
Paint Creek 0.8 15.8
*ivie, 1976.
** 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/m2/yr 0.55 0.52 4.6 4.0
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of E. V. Spence Reservoir:
"Dangerous" (eutrophic loading) 0.20
"Permissible" (oligotrophic loading) 0.10
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V. LITERATURE REVIEWED
Ivie, 0. H., 1976. Personal communication (lake morphometry, diver-
sions, and evaporation loss). Colorado River Municipal Water
Dist., Big Springs.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Natl. Res. Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
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15
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LAKE QAT* TO SE USE') 'N RANKING^
LAKE
CODE LAKE NAME
4601 AMISTAD LAKE
4802 BASTROP LAKE
4803 8ELTON RESERVOIR
4804 BRAUNIG LAKE
4805 BROWNWOOD LAKE
4806 LAKE BUCHANAN
4807 CADDO 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 RESEKVO
4816 KEMP LAKE
4817 HOUSTON LAKE
4818 LAKE OF THE PINES
4819 LAVON RESERVOIR
4820 LIVINGSTON LAKE
4831 LYNDON B JOHNSON LAKE '
4822 MEDINA LAKE
4823 LAKE MEREDITH
4824 PALESTINE LAKE
4825 POSSUM KINGDOM RESERVOIR
4826 SAN ANGELO RESERVOIR
4827 SAM RAY8URN RESERVOIR
4828 E V SPENCE RESERVOIR
MEDIAN
TOTAL P
0.013
0.02?
0.016
0.1 34
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
o.oeo
0.070
0.105
0.380
0.110
0.260
0.090
0.160
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
CHLOWA
2.-'«2
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. BOO
14.600
10.400
12.400
15.000
8.800
15.000
14.900
15.000
14.900
14.600
15.000
10.200
15.000
15.000
MEDIAN
DISS O^TriO 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
4831 STILLHOUSE HOLLO* RESEWV
4832 TAWAKOM 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
INOrtO 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
473.833
482. 7U
406.250
466.417
47B.500
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
UISS OrtTriO
0.013
0.012
0.010
0.013
0.030
0.018
0.007
0.240
0.009
0.009
0.008
-------
OF LA*E5 KITH
VAi-JLS (NUMBER Of LAKES rflTi
LAKE
CODE LAKE NAME
4801 AMISTAO LAKE
4802 BASTSOP LAKE
4803 8ELTON RESERVOIR
4304 8RAUNIG LAKE
4805 BROdNWOOD 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
4.827 S.AM 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)
( 1>
( 14)
( 37)
( 3D
( 20)
( 28)
( 5)
( 22)
, ,-,
MEDIAN
IN03G N
5
7f
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
,.-
( 2)
( 28)
( 10)
( 16)
( 26)
( 7)
( 33)
( 38)
( 3)
( 28)
( 18)
( 31)
( 33)
( 25)
( 5)
( 22)
( 6)
( 28)
( 11)
( 1)
( 4)
( 0)
( 33)
( 12)
< 33)
( 17)
( 15)
- 7-,
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
' C
( 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)
f '71
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
0
76
<^r
( 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)
( 'S>
Ib-
MIN L>0
39
17
17
49
58
17
76
67
49
38
61
97
79
95
55
84
72
17
100
17
39
17
39
49
17
88
17
>7
( 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)
( Q)
MEDIAN
OISS OUThO 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
3B4
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 L4KES *ITH HIGHER VALUES)
LAKE
CODE LAKE NAME
4829 SOMERVILLE LAKE
4830 STAMFORD LAKE
4831 STILLHOUSE HOLLOW
4832 TAWAKONI LAKE
. 4833 TEXARKANA LAKE
4834 TEXOMA LAKE
4635 TRAVIS LAKE
4836 TKINIOAD
4837 TWIN BUTTES RESEKVOIR
4838 WHITE RIVER RESERVOIR
4839 WHITNEY LAKE
MEDIAN
TOTAL P
29 I
18 (
88 (
32 (
11 <
39 (
88 (
0 (
59 (
84 (
63 (
11)
7)
33)
12)
4)
14)
33)
0)
22)
32)
24)
MEDIAN 500-
INORG N MEAN SEC
55
V7
37
70
51
34
21
61
21
61
51
( 21)
< 37)
( 14)
( 26)
( 19)
( 13)
< 7)
( 22)
( 7)
( 22)
( 19)
24 (
5 (
67 (
37 (
13 <
61 (
92 (
11 (
58 <
76 (
79 (
9)
2)
33)
14)
5)
23)
35)
4)
22)
29)
30)
MEAN
CHLOrtA
3 (
18 <
92 (
21 (
16 (
45 <
82 <
5 (
61 (
89 (
71 (
1)
7)
35)
8)
6)
17)
3D
2)
23)
34)
27)
15- MEDIAN
MIN oo DISS O^THO H
67
82
17
63
72
17
17
92
49
17
17
( 25)
( 3D
< 0)
( 24)
( 27)
( 0)
( 0)
( 35)
( 17)
( 0)
( 0)
30 I
39 (
51 (
30 (
13 (
21 (
84 (
0 (
63 (
63 (
76 (
10)
14)
19)
10)
5)
7)
3D
0)
21)
21)
28)
INOEX
NO
20B
259
372
253
176
217
384
169
311
390
357
-------
PANK*1) PV iNOE* NOS.
RANK LAKE CODE LAKE NAME INDEX NO
i 4809 CANVON 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 3RO*NWOOD LAKE 394
7 4802 BASTRuP LAKE 393
8 4838 WHITE RIVEK RESERVOIR 390
9 4825 POSSUM K1NGOOM RESERVOIR 387
10 4835 TRAVIS LAKE 384
11 4803 BELTON RESERVOIR 384
12 4831 STILLHOUSE HOLLOW RESERV 372
13 4812 DIVERSION LAKE 372
14 480B CALAVERAS LAKE 362
15 4839 WHITNEY LAKE 357
16 4822 MEDINA LAKE 342
17 4827 SAM RAYBURN RESERVOIR 322
18 4828 E V SPENCE RESERVOIR 321
19 4837 TWIN BUTTES RESERVOIR 311
20 4810 LAKE COLORADO CITY 310
21 4824 PALESTINE LAKE 302
22 4818 LAKE OF THE PINES 298
23 4807 CADOO LAKE 297
24 4814 FT PHANTOM HILL LAKE 296
25 4806 LAKE BUCHANAN 261
26 4830 STAMFORD LAKE 259
27 4819 LAVON RESERVOIR 258
-------
LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME
29 4B21 LYNDON B JOHNSON LAKE
30 4834 TEXOMA LAKE
31 4829 SOMERVILLE LAKE
32 4826 SAN ANGELO RESERVOIR
33 4833 TEXARKANA LAKE
34 4815 GARZA LITTLE ELM RESERvO
35 4836 TRINIDAD
36 4804 BRAUNIG LAKE
37 4811 CORPUS CRISTI LAKE
38 4817 HOUSTON LAKE
39 4820 LIVINGSTON LAKE
INDEX NO
238
217
208
200
176
173
169
159
155
139
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
-------
SJSl'T AMY H.OH Hit OKHo.T ION FOk
i 6/76
LAKE CODE 4828
E. V. Sf>EMCE
SUB-DRAINAGE
TnlBJTARY AREAtSQ KM) JAN
482HA1
4828A2
432BB1
4628^^
40766.6
40124.3
67.6
575.0
O.OOb
0.23
0.001
0.011
FEri
0.008
0.28
0.011
0.054
MAR
0.011
0.002
.0.054
NORMALIZED FLOwS(CMS)
APR MAY JUN JJL AUG
O.C17
1.08
0.026
0.156
0.020
3.71
0.164
0.821
0.227
2.04
0.051
0.275
0.057
1.22
0.028
O.lbl
0.142
7.56
0.011
0.269
SEP
0.085
2.78
0.034
0.224
OCT
0.017
0.54
U.054
0.244
Nuv/
0.008
0.59
0.006
JEC
0.028
0.23
0.003
0.023
MEA,
0.052
1.83
0.033
0. 196
SUMMARY
TOTAL DRAINAGE AREA OF LAKE =
SUM OF SUB-OPAINAGE AREAS =
40766.6
40766.8
TOTAL FLO* IN
TOTAL FLOW OUT
24.56
0.63
MEAN MONTHLY FLOWb AND OAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR
4828A1
MEAN FLOW DAY
4828A2
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
FLOW DAY
FLOW DAY
FLOrf
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
8.382
13.309
1.501
0.595
0.510
0.708
0.252
0.136
5.154
0.538
6.145
5.890
8
5
2
8
5
1
2
6
4
22
20
3
8
5
2
7
. 5
1
2
6
4
22
20
3
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0 20
0.0 25
0.0
0.0
o.o
0.037
0.340
4.672
- 0.623
0.651
0.906
0.368
0.170
0.057
0.170
20.9fi3
2.860
0.0
0.0
-------
t-,.1,'.-; i -Jr O
-UK
(j 3/ i 1> < b
LAKE CODE 48?8 E. V. SPEMCE
MEAN MONTHLY FLOWS ANU DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAk MEAN FLOW DAY
4828ZZ
9
10
11
12
1
2
3
4
5
6
7
9
9
10
11
12
1
2
3
4
5
6
7
a
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.283
0.850
0.028
0.028
0.028
0.057
0.014
0.008
0.283
0.028
0.340
0.340
5
2
7
5
1
2
6
4
7
20
3
FLO* DAY
0.0
0.0
0.0
c.o
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
FLOW
FLOW
20
25
22
0.0
0.0
0.0
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
Ei RCTRirvAL JATK ?*,,'0?
31 55 2<*.0 100 33 43.0
£ v SPENCt RESEWvOIH
4*061 I
DATE TIME DEPTH
F30M OF
TO DA/ FEET
74/03/04 13 00 0000
13 00 0005
13 00 0015
13 00 0032
74/05/15 13 ?5 0000
13 ?5 0005
13 25 0015
13 ?5 0027
74/08/05 13 45 0000
13 45 0005
13 45 0015
13 45 0025
13 45 0040
74/10/29 09 50 0000
09 50 0005
09 50 0015
09 50 0035
09 50 0052
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/03/04 13 00 0000
13 00 0005
13 00 0015
13 00 0032
74/05/15 13 25 0000
13 25 0005
13 25 0015
13 25 0027
74/08/05 13 45 0000
74/10/29 09 SO 0000
09 50 0005
09 50 0009
09 50 0015
09 50 0035
OJ SO 0052
00010
WATER
TEMP
CENT
13.3
13.3
12.6
11.1
23.3
23.3
23.1
23.0
25.4
25.4
25.4
25.3
24.6
19.2
19.2
19.2
19.2
19.3
30665
PHOS-TOT
MG/L P
0.014
0.016
0.014
0.015
0.033
0.027
0.029
0.028
0.044
0.04U
0.037
0.040
0.052
00300 00077 00094
00 T-(4NSP CNOUCTVY
SECCHI FIELD
MG/L INCHES M1CPOMHO
36
1C. 4
10.0
9.6
43
7. B
7.8
7.4
6.2 72
6.2
6.0
3.0
0.0
36
6.8
/
7.4
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
4.7
3.4
12.4
19.7
5.0
1.0
1705
1702
1661
1618
2245
2241
2236
2233
2662
2662
2662
2658
2610
1673
1686
1682
1682
1663
11EPALE
J
S 2111202
003R FEET DEPTH
00400 00410 00610 00625 00630 00671
PH T ALK NH3-N TOT KJEL N02&N03 PnOS-JlS
CAC03 TOTAL N N-TOTAL ORTflO
SU MG/L MG/L MG/L MG/L MG/L P
8'. 40
8.40
8.35
8.30
8.30
8.30
8.30
8.25
7.90
8.00
8.00
7.80
7.70
8.20
8.25
8.30
8.30
8.30
137 0.030 0.500 0.030 0.008
136 0.020 0.500 0.030 0,007
135 0.020 0.500 0.030 0.008
135 0.040 0.400 0.040 0.009
133 0.030 0.700 0.080 0.006
133 0.060 0.500 0.070 0.006
133 0.060 0.400 0.070 0.006
135 0.030 0.400 0.020 0.005
106 0.090 1.000 0.030 0.023
105 0.060 0.700 0.020K 0.008
106 0.070 0.600 0.020K 0.008
107 0.070 0.700 0.020K 0.008
107 0.090 0.700 0.020K 0.010
K VALUE KNOWN TO BE
-------
hti^Ifiv'AL UA.E .'.j/O
482802
31 56 25.0 100 35 09.0
E V SPEN^d *ESEPVOI*
43081 TEXAS
DATE
FROM
TO
74/03/04
74/05/15
74/08/05
74/10/29
00010
TIMF. DEPTH WATER
OF TEMP
DAV FEET
12
12
12
12
13
13
13
13
14
14
14
14
10
10
10
10
30
30
30
30
05
05
05
05
15
15
15
15
20
20
20
20
0000
0005
0015
0027
0000
0005
0015
0031
0000
0005
0015
0030
0000
0005
0015
0031
CENT
13.8
13.1
12.2
11.3
23.3
23.3
23.0
21.4
25.5
25. S
25.5
25.4
18.7
18.7
18.6
18.5
11EPALE5
00300
00
MG/L
10.2
10.2
9.6
7.4
6.8
5.2
6.0
6.2
6.0
4.8
7.4
6.8
00077
T94NSP
SECCHI
INCHES
32
28
54
42
00094
CNiOUCTVY
FIELD
MIC^OMHO
1730
1710
1614
1629
2256
2248
2230
2155
2689
2689
2677
1660
1657
1657
1656
3
00400
PH
SU
6.30
8.40
8.30
8.20
8.30
8.25
8.00
8.00
8.00
8.00
8.10
7.90
8.50
8.40
8.40
8.40
00410
T ALK
CAC03
MG/L
151
153
154
153
137
136
136
138
106
104
104
105
211
0032
00610
NH3-N
TOTAL
MG/L
O.C30
0.020
0.030
0.030
0.070
0.070
0.040
0.110
O.ObO
0.050
0.050
0.060
1202
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.600
0.500
0.600
0.600
0.800
0.500
0.500
0.600
o.eoo
0.600
0.600
0.600
00630
N02J.N03
N-TOTAL
MG/L
0.030
0.030
0.030
0.030
0.070
0.080
0.020
0.080
0.020K
0.020K
0.020K
0.020K
00&71
PrlOS-OIS
ORTrlO
MG/L P
0.006
0.008
0.009
0.009
0.007
0.006
0.005
0.006
0.008
0.018
0.008
0.008
DATE
FROM
TO
74/03/04
74/05/15
74/08/05
74/10/29
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
12
12
12
12
13
13
13
13
14
14
10
10
10
10
30
30
30
30
05
05
05
05
15
15
20
20
20
?0
0000
0005
0015
0027
0000
0005
0015
0031
0000
0011
0000
0005
0015
0031
MG/L P UG/L PERCENT
0
0
0
0
c
0
0
0
0
0
0
0
.017 5.4
.018
.016
.020
.036 4.5
.033
.036
.040
13.4
1.0
.036 24.0
.040
.038
.03d
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
31 5d 11.0 100 36 47.0
E V b?EMC_
TEXAS
llErALES
DATE
FRON-
TO
74/03/04
74/05/15
74/08/05
74/10/39
DATE
FROM
TO
74/03/04
74/05/15
74/08/05
74/10/89
TIME DEPTH
OF
DAY FEET
12 05 0000
12 05 0005
12 05 0015
12 40 0000
12 40 0005
12 40 0015
12 40 0021
It 45 0000
14 45 0005
14 45 0015
14 45 0022
10 45 0000
10 45 0005
10 45 0015
10 45 0022
TIME DEPTh
OF
DAY FEET
12 05 0000
12 05 0005
12 05 0015
12 40 0000
12 40 0005
12 40 0015
12 40 0021
14 45 0000
10 45 0000
10 45 0002
10 45 0003
10 45 0005
10 45 0015
10 45 0022
00010
WATEk
TEMP
CENiT
14.1
13.1
12.7
23.9
23.9
23.6
23.4
25.2
25.2
25.0
24.9
18.1
18.1
17.9
17.9
OC665
PHOS-TOT
MG/L P
0.022
0.019
0.027
0.045
0.040
0.044
0.044
0.074
0.073
0.068
0.069
00300
DO
MG/L
9.8
9.6
6.6
7.0
6.6
6.8
6.4
6.4
6.4
7.2
7.4
7.0
7.2
32217
CHLRPHYL
A
UG/L
5.9
6.2
16.9
24.8
00077
TR«NSP
SECCHI
INCHES
29
17
36
24
00031
INCOT LT
REMNING
PERCENT
5.0
1.0
00094
CNDUCTVY
FIELD
MICROMHO
1765
1728
1729
2340
2339
2327
2318
2700
2703
2698
2689
1214
1214
1207
1203
s
3
00400
Ph
SU
8.40
8.30
8.30
8.20
8.20
8.15
8.15
8.10
8.10
8.10
8.00
8.40
8.40
8.35
8.40
00410
T ALK
CAC03
MG/L
146
148
151
136
136
137
135
98
101
99
101
211
0020
00610
NH3-N
TOTAL
MG/L
0.030
0.030
0.030
0.070
0.070
0.070
0.040
0.030
0.030
0.040
0.040
1202
FEET OEHTH
00625
TOT KJEL
N
MG/L
0.700
0.600
0.600
0.800
0.600
0.500
0.500
0.900
0.700
0.600
0.600
00630
N02^N03
N- TOTAL
MG/L
0.030
0.030
0.040
0.080
0.080
0.080
0.030
0.250
0.220
0.220
0.210
00671
PhOS-DIS
ORTHO
MG/L P
0.007
0.010
0.009
0.006
0.011
0.007
0.007
0.014
0.013
0.013
0.012
-------
APPENDIX E
TRIBUTARY DATA
-------
7 6v 03/10
32 u3 00.0 100 46 00.0 4
COLORADO rtUE*
43 f.b DEAD INDIAN
T/E v SPcNCE rJESERvUih
2NDPY *D BKUG 5 MI w OF SILVER
HEr'ALES 2111204
OuOO FEET OEPTn CLASS 00
DATE
FROM
TO
74/09/08
74/10/05
74/11/02
74/12/07
75/01/05
75/02/01
75/03/02
75/04/06
75/04/20
75/04/25
75/05/04
75/06/22
75/07/20
75/08/03
OC630 006?5
TIME DEPTH N02t>NG3 TOT NJEL
OF N-TOTAL N
DAY FEET
10
12
12
10
08
14
09
10
10
12
10
09
11
10
55
30
45
30
30
30
00
30
00
30
00
00
00
00
MG/L
d
0
0
0
0
0
0
0
0
c
0
0
0
.003
.024
.704
.064
.072
.012
.005
.010
.010
.010
.010
.005
.010
MG/L
1.
1.
1.
2.
2.
1.
1.
1.
0.
3.
1.
1.
0.
1.
000
000
000
600
100
300
750
350
550
200
450
330
950
000
00610 00671
Nril-N HriOS-DlS t
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
035
045
135
032
040
032
030
065
067
040
045
025
025
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
c.
0.
c.
p
040
015
110
120
370
224
105
105
093
085
055
035
225
00665
'HG5-TOT
MG/L P
0.130
0.060
0.23C
0.200
0.52C
0.360
0.250
0.230
0.221
0.190
-0.190
0.1/b
0.120
0.340
-------
4823^1
3l"5J 10.0 100 35 07.0 A
HAJuT CRttrv
nd 7.5 EDITH
T/E V SPENCE SESEHVOI^
br(00 1.4 il j» JC1 riwY 53 2.5 M SE EDITH
llE^ttLES 211120'.
000^0 FEET UEPTh CLASS 00
00630 00625 00610 00671 00665
DATE TIME OEPTn N02&N03 TOT KJEL NH3-N PHOS-OIS PHOS-TOT
FROM OF N-TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/L P MG/L P
75/06/07 11 06 0.180 0.850 0.170 0.015 0.055
------- |