U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
VEST OAKWOCD LAKE
BROKINGS COUNTY
SOUTH DAKOTA
EPA REGION VIII
WORKING PAPER No, 616
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440
-------
REPORT
ON
VEST OAKWOOD LAKE
BROKINGS COUNTY
SOUTH DAKOTA
EPA REGION VI11
WORKING PAPER No, 616
WlTH THE COOPERATION OF THE
SOUTH DAKOTA DEPARTMENT OF ENVIRONMENTAL PROTECTION
AND THE
SOUTH DAKOTA NATIONAL GUARD
JANUARY/ 1377
-------
CONTENTS
Foreward ii
List of South Dakota Study Lakes iv
Lake and Drainage Area Map . v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 1
III. Lake Water Quality Summary 3
IV. Nutrient Loadings 4
V. Literature Reviewed 8
VI. Appendices 9
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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
freshwater 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.
ACKNOWLEDGMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the South Dakota Departments of
Environmental Protection and Game, Fish and Parks for professional
involvement, to the South Dakota National Guard for conducting the
tributary sampling phase of the Survey, and to those wastewater
treatment plant operators who voluntarily provided effluent samples.
Allyn Lockner, Secretary, and Blaine Barker and Duane Murphy,
Department of Environmental Quality; Douglas Hansen, Department
of Game, Fish and Parks; and James Hayden, Director, State Lakes
Preservation Committee provided invaluable lake documentation and
counsel during the Survey, reviewed the preliminary reports, and
provided critiques most useful in the preparation of this Working
Paper series.
Major General Duane .L. Corning, the Adjutant General of South
Dakota, and Project Officer Colonel Robert D. Chalberg, who directed
the volunteer efforts of the South Dakota National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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iv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF SOUTH DAKOTA
LAKE NAME
Albert
Alvin
Angostura
Brant
Byron
Clear
Clear
Cochrane
Cottonwood
Deerfield
Enemy Swim
Herman
John
Kampeska
Madison
Mitchell
Norden
East Oakwood
West Oakwood
Pactola
Pickerel
Poinsett
Red Iron South
Richmond
Roy
Sand
Sheridan
Stockdale
East Vermillion
Wall
Waubay
COUNTY
Kingsbury
Lincoln
Fall River
Lake
Beadle
Marshall
Minnehaha
Deuel
Spink
Pennington
Day
Lake
Ham!in
Codington
Lake
Davidson
Hamli n
Brookings
Brookings
Pennington
Day
Brookings,
Marshall
Brown
Marshall
Brown
Pennington
Custer
McCook
Minnehaha
Day
Lake
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97'05
9700
96'55'
OAKWOOD LAKES
® Tributary Sampling Site
X Lake Sampling Site
44'30—
r
S. Dak.
Map Location
14425-
L\
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WEST OAKWOOD LAKE
STORE! NO. 4619
I. INTRODUCTION
West Oakwood Lake was included in the National Eutrophication Survey
as a water body of interest to the South Dakota Departments of Health
and Game, Fish and Parks. Due to lack of flows, no tributary or outlet
samples were collected. Therefore, this report relates only to the lake
sampling data.
II. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that West Oakwood Lake is eutrophic. It
ranked twentieth in overall trophic quality when the 31 South
Dakota lakes sampled in 1974 were compared using a combination of
six lake parameters*. Fifteen of the lakes had less median total
phosphorus, 13 had less median dissolved orthophosphorus, 15 had
less median inorganic nitrogen, 29 had less mean chlorophyll a_,
and 23 had greater mean Secchi disc transparency.
Survey 1imnologists observed a heavy algal bloom in progress
at both sampling stations in July and September.
B. Rate-Limiting Nutrient:
Because of nutrient changes in the samples from the times of
collection to the beginning of the assays, the algal assay results
are not considered representative of conditions in the lake at the
time the samples were taken (04/23/74 and 09/20/74).
* See Appendix A.
-------
The lake data indicate phosphorus limitation in April but
nitrogen limitation in July and September.
-------
III. LAKE CHARACTERISTICS1"
A. Lake Morphometry :
1. Surface area: 1.21 kilometers2.
2. Mean depth: 1.8 meters.
3. Maximum depth: 3.0 meters.
4. Volume: 2.178 x 106 m3.
B. Precipitation*:
1. Year of sampling: 37.2 centimeters.
2. Mean annual: 56.2 centimeters.
t Table of metric conversions—Appendix B.
tt Murphev, 1974.
* See Working Paper No. 175, "...Survey Methods, 1973-1976".
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IV. LAKE WATER QUALITY SUMMARY
West Oakwood Lake was sampled three times during the open-water
season of 1974 by means of a pontoon-equipped Huey helicopter. Each
time, samples for physical and chemical parameters were collected
from one or more depths at two stations on the lake (see map, page v).
During each visit, a single depth-integrated (near bottom 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 from 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 2.1 meters at
station 1 and 1.5 meters at station 2.
The sampling results are presented in full in Appendix C and are
summarized in the following table.
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A. SUMMARY OF PHYSICAL AND
CnEMICAL CnASACTE^lSTICS fOft OAKwOOD LAKE «/EST
STO^ET CODE
PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNDCTVY IMCROMO)
PH (STAND UNITS)
TOT ALK (MG/U)
TOT P (MG/L)
OftTHO P (MG/L)
N02»N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INOHO N (MG/L)
TOTAL N (MG/L)
CHLrtPYL A (UG/U)
SECCHI (METERS)
1ST SAMPLING (' 4/23/74)
? SITES
RANGE
10.2
10.8
406.
fl. 8
167.
0.181
0.011
0.150
0.520
5.000
0.700
5.150
tsB • ?
0.4
- 10.5
- 11.2
- 522.
8.8
- 168.
- 0.220
- 0.012
- 0.190
- 0.580
- 5.200
- 0.730
- 5.390
- 74.0
0.5
MEAN
10.3
11.0
454.
8.8
167.
0.19<*
0.011
0.173
0.540
5.067
0.713
5.240
71.1
0.5
MEDIAN
10.3
11.0
435.
8.8
167.
0.181
0.011
0.180
0.520
5.000
0.710
5.180
71.1
0.5
2ND SAMPLING ( 7/12/74)
2 SITES
WANGE
24.8
5.4
1064.
8.9
132.
O.lbl
0.029
0.030
0.050
3.400
0.080
3.440
310.2
0.3
- 26.0
6.6
- 1073.
9.3
- 161.
- 0.234
- 0.052
- 0.120
- 0.130
- 5.800
- 0.250
- 5.860
- 347.6
0.3
MEAN
25.2
6.0
1067.
9.1
150.
0.197
0.040
0.066
0.072
4.380
0.136
4.446
328.9
0.3
MEDIAN
25.1
6.0
1065.
9.2
159.
0.197
0.036
0.060
0.060
4.000
0.120
4.080
328.9
0.3
tf
16.2
7.2
840.
8.4
142.
0.120
0.013
0.020
0.070
2.500
0.090
2.520
70.5
0.3
3KO SAMPLING < 9/20/741
2 SITES
ANGE
- 16.4
6.2
- 870.
8.4
- 147.
- 0.185
- 0.022
- 0.020
- 0.130
- 0.800
- 0.150
- 0.620
- 87. b
0.3
MEAN
16.3
7.7
855.
8.4
145.
0.150
0.017
0.020
0.095
5.600
0.115
5.620
79.0
0.3
MEDIAN
16.3
7.6
855.
8.4
146.
0.147
0.017
0.020
0.090
6.550
0.110
6.570
79.0
0.3
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B. Biological characteristics:
1. Phytoplankton
Sampling
Date
04/23/74
07/12/74
09/20/74
2. Chlorophyll a_ -
Sampling
Date
04/23/74
07/12/74
09/20/74
Dominant
Genera
1. Oscillatoria sp.
2. Centric diatoms
3. Chlorophytan cells
4. Pennate diatoms
5. Chroomonas sp.
Other genera
Total
1. Aphanizpmenon sp.
2. Oscillatoria sp.
3. MelpsIra sp.
4. Lyngbya sp.
5. MicrocysTis sp.
Other genera
Total
1. Aphanizpmenon sp.
2. Osclllatoria sp.
3. Merismopedia sp.
4. Melosira sp.
5. Coelosphaerium sp.
Other genera
Total
Station
Number
1
2
1
2
1
2
Algal Units
per ml
131,
2,
2,
1,
1,
350
504
504
926
733
3,081
143,098
131,301
22,757
14,948
10,375
1,785
3,012
184,178
134,077
19,459
2,137
1,462
112
114
157,361
Chlorophyll a^
74.0
68.2
310.2
347.6
70.5
87.5
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C. Limiting Nutrient Study:
Because of significant increases in inorganic nitrogen from
the times of collection to the beginning of the assays, the
results are not considered representative of conditions in the lake.
The lake data indicate phosphorus limitation in April but
nitrogen limitation in July and September. The mean inorganic
nitrogen to orthophosphorus ratios were 65 to 1 in April, 3 to 1
in July, and 7 to 1 in September.
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V. LITERATURE REVIEWED
Murphey, Duane G., 1974. Personal communication (lake morphometry).
SD Dept. of Env. Prot., Pierre.
Petrie, Lester R., and L. Rodney Larson, 1966 (?). Quality of water
in selected lakes of eastern South Dakota. Rept. of Inv. #1,
SD Water Res. Comm., Pierre.
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VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
4601 LAKE ALBERT
4602 ALVIN LAKE
4603 ANGOSTURA RESERVOIR
4604 BRANT LAKE
4605 LAKE BYRON
4606 CLEAR LAKE
4607 CLEAR LAKE
4608 COCHHANE LAKE
4609 COTTONWOOD LAKE
4610 OEERFIELO RESERVOIR
4611 ENEMY SWIM LAKE
4612 LAKE HERMAN *
4613 ST JOHN LAKE
4614 LAKE KAMPESKA „
4615 MADISON LAKE
4616 LAKE MITCHELL,
4617 LAKE NOROEN
4618 OAKWOOD LAKE EAST .
4619 OAKWOOD LAKE WEST
4620 PACTOLA RESERVOIR
4621 PICKEREL LAKE
4622 LAKE POINSETT
4623 LAKE RED IRON SOUTH
4624 RICHMOND LAKE
4625 ROY LAKE
4626 SAND LAKE
4627 SHERIDAN LAKE
4628 STOCKADE LAKE
MEDIAN
TOTAL P
0.321
0.067
0.019
0.194
0.443
0.027
1.400
0.037
0.685
0.033
0.037
0.340
0.348
0.220
0.250
0.099
0.256
0.146
0.181
0.011
0.049
0.115
0.042
0.187
0.034.
0.489
0.053
0.233
MEDIAN
INORG N
0.170
0.970
0.160
0.130
0.370
0.075
0.270
0.150
0.265
0.080
0.085
- 0.155
0.080
0.105
0.090
0.085
0.165
0.175
0.135
0.070
0.095
0.315
0.110
0.150
0.070
0.110
0.105
0.150
500-
MEAN SEC
4*9.111
442.833
423.333
432.833
488.333
.'430.167
495.333
446.000
490.333
303.333
442.600
485.000
489.400
468*889
445.555
465.833
488.667
487.000
485.833
248.444
439.833
468.444
430.333
410.000
431.000
471.800
394.000
432.000
MEAN
CHLORA
106.289
4.700
3.717
34.150
149.350
11.983
691.000
15.683
112.017
3.650 .
14.200
58.733
120.880
20.567
22.578
14.883
46.800
113.600
159.667
1.478
15.833 .
40.211
6.883
18.467
13.333
65.790
15.433
25.400
15-
MIN DO
9.200
9.400
13.000
11.800
9.000
8.800
7.000
15.000
8.600
15.000
8.200
8.600
9.800
8.200
14.000
13.800
10.000
10.000
9.600
11.000
9.600
10.000
7.600
10.000
11.000
12.800
15.000
15.000
MEDIAN
DISS ORTHO P
0.019
0.017
0.005
0.113
0.146 :
0.009
0.468
0.008
'0.417
0.022
0.013
0.174
0.025
0.128
0.107
0.015
0.050
0.009
0.021
0.006
0.009
0.023
0.010
0.144
0.010
0.288
0.016
0.109
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LAKE DATA TO BE USED IN RANKINGS
LA
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE :
CODE LAKE NAME
4601 LAKE ALBERT
4602 ALVIN LAKE
4603 ANGOSTURA RESERVOIR
4604 BRANT LAKE
4605 LAKE BYRON
4606 CLEAR LAKE
4607 CLEAR LAKE
4608 COCHRANE LAKE
4609 COTTONWOOD LAKE
4610 DEERFIELD RESERVOIR
4611 ENEMY SWIM LAKE
4612 LAKE HERMAN
4613 ST JOHN LAKE
4614 LAKE KAMPESKA
4615 MADISON LAKE
4616 LAKE MITCHELL
\
461? LAKE NOROEN
4618 OAKWOOD LAKE EAST
4619 OAKWOOO LAKE WEST
4620 PACTOLA RESERVOIR
4621 PICKEREL LAKE
4622 LAKE POINSETT
4623 LAKE RED IRON SOUTH
4624 RICHMOND LAKE
4625 ROY LAKE
4626 SAND LAKE
4627 SHERIDAN LAKE
4628 STOCKADE LAKE
MEDIAN
TOTAL P
20 ( 6)
67 ( 20)
97 ( 29)
40 < 12)
10 ( 3)
93 ( 28)
0 ( 0>
83 ( 25)
3(1)
90 ( 27)
80 ( 24)
17 ( 5)
13 ( 4)
33 ( 10)
•It.
27 ( 8)
60 < 18)
23 ( 7)
53 ( 16)
50 < 15)
100 ( 30)
73 ( 22)
57 ( 17)
77 ( 23)
47 ( 14)
87 ( 26)
7 ( 2>
70 ( 21)
30 ( 9)
MEDIAN
INORG N
20 ( 6)
0 ( 0)
30 ( 9)
53 ( 16)
3 < 1)
93 ( 28)
10 ( 3)
40 ( 11)
13 ( 4)
88 ( 26)
82 ( 24)
33 ( 10)
88 ( 26)
65 ( 19)
77 ( 23)
82 ( 24)
23 ( 7)
17 ( 5)
50 ( 15>
98 ( 29)
73 ( 22)
7 < 2)
58 ( 17)
40 < 11)
. 98 ( 29)
58 < 17)
65 < 19)
40 ( 11)
500-
MEAN SEC
10 ( 3)
57 ( 17)
87 ( 26)
70 ( 21)
17 ( 5)
83 ( 25)
0 ( 0)
50 ( 15)
3 ( . 1)
97 ( 29)
60 ( 18)
27 ( 8)
7 ( 2)
40 ( 12)
53 ( 16)
47 ( 14)
13 ( 4)
20 ( 6)
23 ( 7)
100 ( 30)
67 ( 20)
43 ( 13)
80 ( 24)
90 ( 27)
77 ( 23)
33 ( 10)
93 < 26)
73 ( 22)
MEAN
CHLORA
23 ( 7)
90 ( 27)
93 ( 28)
47 ( 14)
7 < 2)
83 ( 25)
0 ( 0)
67 ( 20)
20 ( 6)
97 ( 29)
77 ( 23)
33 ( 10)
13 ( 4)
57 ( 17)
53 ( 16)
r
73 ( 22)
40 ( 12)
17 ( 5)
3(1)
100 ( 30)
63 ( 19)
43 ( 13)
87 ( 26)
60 ( 18)
80 ( 24)
30 ( 9)
70 C 21)
50 ( 15)
15-
MIN DO
68 ( 20)
63 < 19)
20 ( 6)
27 ( 8)
73 ( 22)
77 ( 23)
100 ( 30)
5 ( 0)
82 ( 24)
5 < 0)
88 ( 26)
82 ( 24)
53 ( 16)
88 ( 26)
13 ( 4)
17 ( 5)
45 ( 12)
45 ( 12)
58 ( 17)
35 ( 10)
58 ( 17)
45 ( 12)
93 ( 28)
45 ( 12)
35 ( 10)
23 ( 7)
5 ( 0)
5 ( .0)
MEDIAN
DISS ORTHO P
60 ( 18)
63 ( 19)
100 ( 30)
23 ( 7)
13 ( 4)
90 ( 27)
0 ( 0)
93 ( 28)
3 ( 1)
53 ( 16)
73 ( 22)
10 ( 3)
43 ( 13)
20 ( 6)
30 ( 9)
70 ( 21)
40 ( 12)
85 ( 25)
57 ( 17)
97 ( 29)
' 85 ( 25)
47 ( 14)
78 ( 23)
17 ( 5)
78 ( 23)
7 ( 2)
67 ( 20)
27 ( 8)
INDEX
NO
201
340
427
260
123
519
110
338
124
430
460
202
217
•303
253
349
184
237
241
530
419
242
473
299
455
158
370
225
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PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
4629 LAKE VERMILLION
4630 WALL LAKE
4631 WAUBAY LAKE NORTH
MEDIAN
TOTAL P
37
43
63
< 11)
( 13)
( 19)
MEDIAN
INORG N
70 (
27 i
47 i
I 21)
t 8)
I 14)
500-
MEAN SEC
30 1
63 1
37 1
I 9)
I 19)
: ID
MEAN
CHLORA
27 1
37 1
10 <
! 8)
: ID
I 3)
15-
MIN 00
68
97
30
( 20)
< 29)
< 9)
MEDIAN
OISS ORTHO P
33 (
37 1
50 1
: io>
i 11)
I 15)
INDEX
NO
265
304
237
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LAKES RANKED BY INDEX NOS.
RANK • LAKE CODE LAKE NAME
INDEX NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
4620
4606
4623
4611
4625
4610
4603
4621
4627
4616
4602
4608
4630
•
4614
4624
4629
4604
4615
4622
4619
4631
4618
4628
4613
4612
4601
4617
4626
PACTOLA RESERVOIR
CLEAR LAKE
LAKE RED IRON SOUTH
ENEMY SWIM LAKE
ROY LAKE
OEERFIELD RESERVOIR
ANGOSTURA RESERVOIR
PICKEREL LAKE
SHERIDAN LAKE ]
LAKE MITCHELL
ALVIN LAKE
COCHRANE LAKE »
WALL LAKE
LAKE KAMPESKA
RICHMOND LAKE
LAKE VERMILLIONy
BRANT LAKE
MADISON LAKE
LAKE POINSETT
OAKWOOD LAKE WEST
WAUBAY LAKE NORTH
OAKWOOD LAKE EAST
STOCKADE LAKE
ST JOHN LAKE
LAKE HERMAN
LAKE ALBERT
LAKE NORDEN
SAND LAKE
530
519
473
460
455
430
427
419
370
349
340
338
304
3
-------
LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO'
39 4609 COTTONWOOD LAKE 124
30 4605 LAKE BYRON 123
31 4607 CLEAR LAKE 110
-------
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 = 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
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APPENDIX C
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/05/03
44 11 15.0 096 59 10.0 4
OAKwOOD LArvt WEST
46011 SOUTH DAKOTA
090791
11EPALES 2111202
0009 FEET DEPTH CLASS 00
DATE
FROM
TO
74/04/23
74/07/12
7<»/09/20
DATE
FROM
TO
74/04/23
74/07/12
74/09/20
TIME DEPTH
OF
DAY FEET
16 10 0000
16 10 0005
14 35 0000
14 35 0004
14 35 0007
10 20 0000
10 20 0004
TIME DEPTH
OF
DAY FEET
16 10 0000
16 10 0005
14 35 0000
14 35 0004
14 35 0007
10 20 0000
10 20 0003
10 ?0 0004
03010
WATER
TEMP
CENT
10.5
10.2
26.0
25.1
24.9
16.4
16.4
00665
PHOS-TOT
MG/L P
0.161
0.181
0.214
0.180
0.197
0.120
0.140
00300
DO
MG/L
10.8
6.0
5.8
5.4
8.2
7.6
32217
CHLRPHYL
A
UG/L
74.0
310.2
70.5
00077
TRANSP
SECCHI
INCHES
17
13
12
00031
INCDT LT
REMNING
PERCENT
1.0
00094
CNDUCTVY
FIELD
MICROMHO
406
522
1073
1064
1064
840
840
00400
PH
SU
8.80
8.80
9.30
9.00
8.90
8.37
8.37
00410
T ALK
CAC03
MG/L
167
167
161
159
161
142
144
00610
NH3-N
TOTAL
MG/L
0.520
0.520
0.130
0.050
0.070
0.070
0.080
00625
TOT KJEL
N
MG/L
5.200
5.000
4.700
3.400
4.000
6.400
2.500
00630
N02&N03
N-TOTAL
MG/L
0.190
0.180
0.120
0.040
0.080
0.020K
0.020K
00671
PHOS-DIS
OHTHO
MG/L P
0.011
0.011
0.029
0.036
0.052
O.OU
0.013
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL OATE 76/05/03
461902
44 12 00.0 097 00 30.0 4
46011 aOUTH (DAKOTA
090791
11EFALES 2111202
0006 FEET DEPTh CLASS 00
DATE
FROM
TO
74/04/23
74/07/12
74/09/20
DATE
FROM
TO
74/04/23
74/07/12
74/09/20
TIME DEPTH
OF
DAY FEET
16 20 0000
14 20 0000
14 20 0005
10 40 0000
10 40 0002
TIME DEPTH
OF
DAY FEET
16 20 0000
14 20 0000
14 20 0005
10 40 0000
10 40 0002
OC010
WATER
TEMP
CENT
10.3
25.2
24.8
16.2
16.2
00665
PHOS-TOT
MG/L P
0.220
0.161
0.234
0.154
0.185
00300
DO
MG/L
11.2
6.6
6.0
8.0
7.2
32217
CHLRPHYL
A
UG/L
68.2
347.6
87.5
00077 00094 00400 00410 00610 00625
TRANSP CNDUCTVY PH T ALK NH3-N TOT KJEL
SECCHI FIELD CAC03 TOTAL N
INCHES MICWOMHO SU
19 435 8.80
12 1068 9.30
1065 9.20
12 870 8.36
870 8.36
00031
INCDT LT
REMNING
PERCENT
1.0
MG/L MG/L MG/L
168 0.580 5.000
135 0.050 4.000
132 0.060 5.800
147 0.100 6.800
147 0.130 6.700
00o30 00671
N02«.N03 PHOS-OIS
N-TOTAL ORTHO
MG/L MG/L P
0.150
0.030
0.060
0.020K
0.020K
0.012
0.036
0.047
0.022
0.020
K v/ALUE KNOWN TO BE
LESS THAN INDICATED
------- |