U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
WALL LAKE
MINNEHAHA COUNTY
SOUTH DAKOTA
EPA REGION VIII
WORKING PAPER No, 627
CORV ALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•':i. I'.i) 699-440
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REPORT
ON
WLLLAKE
MINNEHAHA COUNTY
SOUTH DAKOTA
EPA REGION VI11
WORKING PAPER No, 627
WITH THE COOPERATION OF THE
SOUTH DAKOTA DEPARTMENT OF ENVIRONMENTAL PROTECTION
AND THE
SOUTH DAKOTA NATIONAL GUARD
DECEMBER, 1976
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1
CONTENTS
Page
Foreward ii
List of South Dakota Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions I
II. Lake and Drainage Basin Characteristics 1
III. Lake Water Quality Sumary 2
IV. Nutrient Loadings 3
V. Literature Reviewed 7
VI. Appendices 8
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- I l
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration comitment 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 [ 3O3(e)J, water
quality criteria/standards review [ 5303(c)], clean lakes [ 53l4(a,b)],
and water quality monitoring [ 5106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendnents of 1972.
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111
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 Blame 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 1. 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 COUNTY
Albert Kingsbury
Alvin Lincoln
Angostura Fall River
Brant Lake
Byron Beadle
Clear Marshall
Clear Minnehaha
Cochrane Deuel
Cottonwood Spink
Deerfield Pennington
Enemy Swim Day
Herman Lake
John Hamlin
Kampeska Codington
Madison Lake
Mitchell Davidson
Norden Haml in
East Oakwood Brookings
West Oakwood Brookings
Pactola Pennington
Pickerel Day
Pojnsett Brookings, Lake
Red Iron South Marshall
Richmond Brown
Roy Marshall
Sand Brown
Sheridan Pennington
Stockdale Custer
East Vermillion McCook
Wall Minnehaha
Waubay Day
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Map
Location
/
I
WALL LAKE
0
Tributary
x
1
Sampling
o 2K m,
0
Site
Lake Sampling Site
/
Scale
1 Mi
2
/
4331:
5 ,
9700’
96 ’59’
96 ’58
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WALL LAKE
STORET NO. 4630
I. INTRODUCTION
Due to lack of flows, no tributary or outlet samples were collected
at Wall Lake. Therefore, this report relates only to the lake sampling
data.
I I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Wall Lake is eutrophic. It ranked
thirteenth when the 31 South Dakota lakes and reservoirs sampled
in 1974 were compared using a combination of six lake parameters*.
Seventeen of the water bodies had less and one had the same median
total phosphorus, 19 had less median dissolved orthophosphorus, 21
had less and one had the same median inorganic nitrogen, 19 had
less mean chlorophyll a, and 11 had greater mean Secchi disc
transparency.
Survey limnologists observed a bloom of filamentous algae in
September.
B. Rate-Limiting Nutrient:
The results of the algal assays indicate that Wall Lake was
nitrogen limited at the times the samples were taken (04/22/74
and 09/20/74).
The lake data indicate nitrogen limitation all three sampling
times.
* See Appendix A.
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2
III. LAKE CHARACTERISTICSt
A. Lake Morphometry :
1. Surface area: 0.90 kilometers 2 .
2. Mean depth: 2.6 meters.
3. Maximum depth: 4.3 meters.
4. Volume: 2.340 x 106 m 3 .
B. Precipitation*:
1. Year of sampling: 43.3 centimeters.
2. Mean annual: 62.8 centimeters.
t Table of metric conversions--Appendix B.
1-1- Murphey, 1974.
* See Working Paper No. 175, “...Survey Methods, 1973-1976”.
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3
IV. LAKE WATER QUALITY SUMMARY
Wall 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
two or more depths at one station on the lake (see map, page v).
During each visit, a single depth—integrated (near bottom to surface)
sample was collected for phytoplankton identification and enumeration;
and a similar sample was taken for chlorophyll a analysis. During the
first and last visits, a single 18.9-liter depth-integrated sample was
collected for algal assays. The maximum depth sampled was 2.1 meters.
The sampling results are presented in full in Appendix C and
are surmiarized in the following table.
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1 SiTES
1 SITES
1 SITES
A. SUMMAWY OF °HYSICAL AND
CHEMICAL C A ACTE IST1CS
STORET CODE ..630
FO WALL LAKE
1ST SAMPLING ( 4/22/74)
2ND SAMPLING (
7/11/741
3RD SAMPLING C
9/20/74)
PARAMETER
RANGE MEAN MEDIAN
RANGE MEAN
MEDIAN
RANGE MEAN
MEDIAN
TEMP CC)
11.1 — 11.2 11.2 11.2
25.4 — 25.4 25.4
25.4
17.5
— 17.5 17.5
17.5
DISS OXY (1IG/L)
9.2 — 9.2 9.2 9.2
7.6 — 7.8 7.7
7.6
8.2
— 8.4 8.3
8.3
CNDCTVY (MCROMO)
65’i. — 754. 704. 704.
1270. — 1270. 1270.
1270.
1081.
— 1083. 1082.
1082.
PH (STAND UNITS)
**Q*** **********************
9.1 — 9.1 9.1
9.1
9.1
— 9.1 9.1
9.1
TOT ALK (MG/L)
167. — 169. 168. 168.
173. — 178. 175.
175.
171.
— 173. 172.
172.
TOT P (MG/L)
0.084 — 0.084 0.084 0.084
0.190 — 0.207 0.197
0.194
0.197
— 0.226 0.211
0.211
ORTHO P (MG/L)
0.031 0.076 0.053 0.053
0.116 — 0.129 0.122
0.122
0.058
— 0.076 0.067
0.067
N02.N03 (MG/I)
0.040 — 0.060 0.050 0.050
0.050 — 0.090 0.063
0.050
0.020
— 0.020 0.020
0.020
AMMONIA (MG/I)
0.080 — 0.090 0.085 0.085
0.210 — 0.250 0.223
0.210
0.140
— 0.140 0.140
0.140
KJEL N (MG/L)
1.400 — 1.400 1.400 1.400
2.100 — 2.600 2.300
2.200
3.300
— 3.400 3.350
3.350
INORG N (MG/I)
0.120 — 0.150 0.135 0.135
0.260 — 0.340 0.287
0.260
0.160
— 0.160 0.160
0.160
TOTAL N (MG/L)
1.440 — 1.460 1.450 1.450
2.150 — 2.690 2.363
2.250
3.320
— 3.420 3.370
3.370
Cr$LM?YL A (UG/L)
5.1 — 5.1 5.! 5.1
110.7 — 110.7 110.7
110.7
50.0
— 50.0 50.0
50.0
SECCFII (METERS)
2.3 — 2.3 2.3 2.3
1.2 — 1.2 1.2
1.2
0.9
— 0.9 0.9
0.9
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5
B. Biological characteristics:
1. Phytoplankton -
Sampling Dominant Algal Units
Date Genera per ml
04/22/74 1. Centric diatoms 951
2. Flagellates 565
3. Fragilaria p. 119
4. Chroomonas . 89
5. Ankistrodesmus p. 30
Other genera 29
Total 1,783
07/11/74 1. Aphanizomenon . .a• 3,724
2. Oscillatoria . 624
Total 4,348
09/20/74 1. Aphanizomenon . 5,614
2. Oscillatoria p. 1,191
Total 6,805
2. Chlorophyll a. -
Sampling Station Chlorophyll a
Date Number ( jigjfl
04/22/74 1 5.1
07/11/74 1 110.7
09/20/74 1 50.0
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6
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
a. April sample -
Ortho P Inorganic N Maximum yield
Spike (mg/i) Conc. (mg/i) Conc. (mg/i) ( mg/i-dry wt. )
Control 0.030 0.170 2.5
0.050 P 0.080 0.170 3.6
0.050 p + 1.0 N 0.080 1.170 28.0
1.0 N 0.030 1.170 14.1
b. September sample -
Ortho P Inorganic N Maximum yield
Spike (mg/i) Conc. (mg/i) Conc. (mg/i) ( mg/i-dry wt. )
Control 0.090 0.768 22.7
0.050 P 0.140 0.768 29.2
0.050 p ÷ 1.0 N 0.140 1.768 44.5
1.0 N 0.090 1.768 32.0
2. Discussion -
The control yields of the assay alga, Selenastrum capri-
cornutum , indicate that the potential primary productivity
of Wall Lake was very high when the algal assay samples were
taken. In both assay samples there was a slight yield increase
with the addition of phosphorus, but the most significant
increase occurred when only nitrogen was added. These results
indicate that Wall Lake was nitrogen limited when the samples
were collected.
The lake data support the assay results. The mean inor-
ganic nitrogen to orthophosphorus ratios were 3 to 1 in April,
2 to 1 in July, and 2 to I in September; and nitrogen limitation
is indicated at these times.
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7
V. LITERATURE REVIEWED
Murphey, Duane G., 1974. Personal conuiunication (lake morphometry).
SD Dept. of Environ. Protection, Pierre.
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8
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE JSEJ IN PANWIN6S
LAKE MEDIAN MEDIAN 500- MEAN 15- MEDiAN
CODE LAKE NAME TOTAL P LNO G N MEAN SEC CIILORA MI DO 0155 ORTrIO I
4601 LAKE ALBERT 0.321 0,170 489.111 106.289 9.200 0.0 9
4b0 ALVIN LAKE 0.067 0.970 442.833 4.700 .4 00 0.017
4603 ANGOSTURA RESERVOIR 0.01 , 0.160 423.333 3.717 13.000 0.005
4604 BPANT LAKE 0.194 0.130 432.833 34.150 11.800 0.113
4605 LAKE. 8YRON 0.443 0.370 488.333 149.350 9.000 0.146
4606 CLEAQ LAKE 0.027 u.075 430.167 11.983 8.800 0.009
4607 CLEAR LAKE 1.400 0.270 495.333 691.000 7.000 0.468
4608 COCHRANE LAKE 0.037 0.150 446.000 15.683 15.000 0.008
4609 COTTONWOOD LAKE 0.685 0.265 490.333 112.017 8.600 0.417
4610 DEERFEELD RESERVOIR 0.033 0.080 303.333 3.650 15.000 0.022
4611 ENEMY SWIM LAKE 0.037 0.085 442.600 14.200 8.200 0.013
4612 LAKE HERMAN 0.340 0.155 485.000 58.733 8.600 0.174
4613 ST JOHN LAKE 0.349 0.080 489.400 1 0.88O 9.800 0.025
4614 LAKE KAMPESKA 0.220 0.105 468.889 20.567 8.200 0.128
4615 MADISON LAKE 0.2S 0.090 445.555 22.578 14.000 0.107
4616 LAKE I4ITCi-iELL 0.099 0.085 465.833 14.883 13.800 0.015
‘ .6)7 LAKE NOQI)LN 0.256 0.165 488.667 46.800 10.000 0.050
4618 OAKWOOI) LAKE EAST 0.146 0.175 487.000 113.600 10.000 0.009
4619 OAKW000 LAKE WEST 0.181 0.135 485.833 159.667 9.b O O 0.021
4620 PACTOLA RESERVOIR 0.011 0.070 248.444 1.478 11.000 0.006
4621 PICKEREL LAKE 0.049 0.095 439.833 15.833 9.600 0.009
4622 LAKE POINSETT 0.115 0.315 468.444 40.211 10.000 0.023
4623 LAKE RED I WN SOUTH 0.042 0.110 430.333 6.883 7.600 0.010
4624 RICHMOND LAKE 0.187 0.150 410.000 18.467 10.000 0.144
4625 ROY LAKE 0.034 0.070 431.000 13.333 11.000 0.010
4626 SAND LAKE 0.489 0.110 471.800 65.790 12.800 0.288
4627 SHERIDAN LAKE 0.053 0.105 394.000 15.433 15.000 0.016
. £ F A.. 33 0 1S0 432.000 25.400 15.000 0.109
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LAKE DATA TO BE USED IN RANKINGS
LAKE MEDIAN MEDIAN 500— MEAN 15 MEI)IAN
CODE LAKE NAME TOTAL P INOr G N MEAN SEC Cr4LOi4A MI t ’ s D C ) DISS ORTiIO P
4629 LAKE VERMILLION 0.211 0.100 472.833 100.800 9.200 0.092
4630 WALL LAKE 0.194 0.160 441.667 5 5.26 1 7.400 0.076
4631 WAUBAY LA IcE NORTH O.09d 0.145 469.555 127.033 11.400 0.023
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PERCENT OF LAKES WITH HIGHER VALUES (‘IUMBER OF LAKES WITH HI HEF VALUCS)
LAKE MEDIAN MEDIAN 500— MEAN 15— MEDiAN INDEX
CODE LAKE NAME TOTAL P LNORG N MEAN SEC CP4LORA MIN DO DISS ORTHO P NO
4601 LAKE ALBERT 20 ( E) 20 ( 6) 10 ( 3) 23 ( 7) b8 ( 20) 60 C 18) 201
4602 ALVIN LAKE 67 ( 20) 0 ( 0) 57 C 17) 90 27) 63 1 19) 63 C } ) 3’a0
4603 APJGOSTURA RESE VOIP 97 1 29) 30 C 9) 87 1 26) 93 C 28) 20 ( 6) 100 30) 427
4604 BRANT LAKE 40 C 12) 53 C 16) 70 1 21) 47 C 14) 27 8) 23 C 7) 260
4605 LAKE BYRON 10 1 3) 3 C 1 17 C 5) 7 1 2) 73 C 22) 13 C 4 123
4606 CLEAR LAKE 93 1 28) 93 C 28) 83 1 25) 83 C 25) 77 C 23) 90 1 27) 51’
4607 CLEAR LAKE 0 C 0) 10 C 3) 0 C 0) 0 1 0) 100 C 30) 0 C 0) 110
4608 COCbIRANE LAKE 83 1 25) 40 1 11) 50 C 15) 67 C 20) 5 ( 0) 93 C 28) 338
4609 COTTONwOOD LAKE 3 C 1) 13 C 4) 3 C 1) 20 I 6) 82 C 24) 3 C 1) 124
4610 DEERFIELD RESERVO1l 90 C 27) 88 1 26) 97 1 29) 97 C 29) 5 C 0) 53 1 16) 430
4611 ENEMY SWIM LAI E 80 1 24) 82 1 24) 60 C id) 77 C 23) 88 C 26) 73 1 2?) 460
4612 LAKE HERMAN 17 C 5) 33 C 10) 27 C 8) 33 C 10) 82 C 24) 10 1 3) 202
4613 ST JOHN LAKE 13 I 4) 88 1 26) 7 1 2) 13 C 4) 53 4 16) 43 C 13) 217
4614 LAKE KAMPESKA 33 C 10) 65 19) ‘.0 C 12) 57 1 17) 88 1 26) 20 C 6) 303
4635 MADISON LAKE 27 C 8) 77 ( 23) 53 4 16) 53 1 16) 13 4) 30 1 9) 253
4616 LAKE MITCHELL 60 C 18) 82 1 24) 47 C 14) 73 4 22) 17 C 5) 70 C 21) 349
4617 LAKE NORDEN 23 I 7) 23 C 7) 13 C 4) 40 C 12) 45 1 12) 40 ( 12) 184
4618 OAKWOOD LAKE EAST 53 1 16) 17 C 5) 20 1 6) 17 C 5) 45 4 12) 85 4 25) 237
4619 OAKW000 LAKE WEST 50 1 15) 50 C 15) 23 4 7) 3 C 1) 58 1 17) 57 C 17) 241
4620 PACTOLA RESERVOIR 100 C 30) 98 ( 29) 100 C 30) 100 C 30) 35 C 10) 97 1 29) 530
4621 PICKEREL LAKE 73 C 22) 73 ( 22) 67 1 20) 63 C 19) 58 C 17) 85 4 25) 419
4622 LAKE POINSETT 57 1 17) 7 ( 2) 43 1 13) 43 C 13) 45 C 12) 47 4 14) 242
4623 LAKE RED IRON SOUTH 77 23) 58 17) 80 1 24) 87 1 26) 93 ( 28) 78 ( 23) 413
4624 RICHMOND LAKE 47 C 14) ‘.0 C 11) 90 4 27) 60 C 18) 45 C 12) 11 C 5) 299
4625 ROY LAKE 87 C 26) 98 C 2 ) 77 23) 80 C 24) 35 C 10) 78 C 23) 455
4626 SAND LAKE 7 C 2) 58 C 17) 33 C 10) 30 C 9) 23 C 7) 7 ( 2) 158
4627 SHERIDAN LAKE 70 C 21) 65 C 19) 93 4 26) 70 C 21) 5 1 0) 67 C 20) 370
STnCKADE LAKE 30 C 9) 40 C 11 73 C 22) 50 C 15) 5 C 0) 27 1 8) 225
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PEi CENT OF
LAKES WITH
HIG iER VALUES (NUM8EP OF
LAKES WITH HLGHEI VALUES)
LAKE
CODE
LAKE
NAME
MEDIAN
TOTAL P
MEDIAN
I iORG
N
500—
MEAN
SEC
CMLOI A
I -
MIN
00
MEDIAN
0155 0RT iO
P
INDE*
NO
4629
LAKE
VERMILLION
37 ( 11)
70 (
21)
30
( 9)
27 ( 8)
68 (
20)
33 1 10)
265
4630
WALL
LAKE
43 1 13)
27 1
8)
63
1 19)
37 C 11)
97 C
29)
37 1 11)
304
4631
WAUBAY LAKE NORTH
63 C 19)
47 C
14)
37
( 11)
10 1 3)
30 1
9)
50 ( 15)
237
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LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
1 4620 PACTOLA RESERVOIR 530
2 4606 CLEAR LAKE 519
3 4623 LAKE RED IRON SOUTH 473
4 4611 ENEMY SWIM LAKE 460
5 4625 ROY LAKE 455
6 4610 DEERFIELD RESERVOIR 430
7 4603 ANGOSTURA RESERVOIR 427
8 4621 PICKEREL LAKE 419
9 4627 SHERIDAN LAKE 370
10 4616 LAKE MITCHELL 349
11 4602 ALVIN LAKE 340
12 4608 COCHRANE LAKE 338
13 4630 WALL. LAKE 304
14 4614 LAKE KAMPESKA 303
15 4624 RICrIMOND LAKE 299
16 4629 LAKE VERMILLION 265
17 4604 BRANT LAKE 260
18 4615 MADISON LAKE 253
19 4622 LAKE POINSETT 242
20 4619 OAKWOOD LAKE WEST 241
21 4631 WAUBAY LAKE NORTH 237
22 4618 OAK OOD LAKE EAST 237
23 4628 STOCKADE LAKE 225
24 4613 ST JOHN LAKE 217
25 4612 LAKE rIERMAN 202
26 4601 LAKE ALBERT 201
27 4617 LAIcE NOROEN
4 1 D I I
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LA’(ES RANKED BY INDEX NOS.
RANK LAIcE CODE LAI E NAME INDEX NO
29 4609 COTTUNW000 LAKE 24
30 4605 LAKE BYRON 123
31 4607 CLEAR LAKE 110
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APPENDIX B
CONVERSION FACTORS
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CONVERSION FA(;TORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x l0 = 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 lbs/square mile
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APPENDIX C
TRIBUTARY FLOW DATA
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TRIBUTARY FLOW INFORMATION FOP SOUTH DAKOTA
05/03/76
TOTAL DRAINAGE AREA OF LAIcE =
SUM OF SUB—DRAINAGE AREAS =
AND OAILY FLOWS(CMS)
MEAN FLOW DAY
0.0 13
0.0 10
0.0 15
0.0 19
0.0 9
0.0 9
0.0 13
0.0 18
0.0 22
0.0 13
0.0
0.0 4
0.0
0.0
0.0
0.0
0.0
0.0
0.001
0.0
0.0
0.0
0.001
0.0
FLOW DAY
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
LAKE CODE 4630 wALL
TOTAL DRAINAGE AREA OF LAKE(SO KM)
SUB—DRAINAGE
TRI8UTA Y AREA(SQ 1 (M)
4630A1 1.3
4630ZZ 18.1
19.4
JAN
0.0
0.0
FE 3
0.0
0.0
MAR
APR
MAY
JUN
JUL
AUG
SEP
0.0
0.057
0.028
0.028 0.028
0.0
0.0
19.4
19.4
0.0
0.0
0.0
0.012
0.009
SUMMARY
FLOW DAY
TOTAL FLOW IN =
TOTAL FLOW OUT =
0.25
0.0
MEAN MONTHLY
TRIBUTARY MONTH
4630A1 10
11
12
1
2
3
4
S
6
7
8
9
4630ZZ 10
11
12
I
2
3
4
5
6
7
8
9
FLOW
FLOWS
YEAR
74
74
74
75
75
75
75
75
75
75
75
75
74
74
74
75
75
75
75
75
75
75
75
75
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APPENDIX D
PHYSICAL and CHEMICAL DATA
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STORET RETPI€VAL DATE 16/45/03
443001
45 33 45.0 096 57 45.0 4
WALL LAKE
46099 SOUTH DAKOTA
010192
11EPALES 2111202
0011 FEET DEPTH CLASS 00
00010 00300 00011 00094 00400 00410 00610 00625 00630 00611
DATE TIME DEPTH WATER DO TRANSP CNDUCTVY P 1 1 T ALK N 1 13—N TOT KJEL NO2tNO3 PHOS—DIS
FROM OF TEMP SECCHI FIELD CACO3 TOTAL N N—TOTAL ORTHO
To DAY FEET CENI MG/L INCHES MICROMHO SU MG/L M6/L MG/L 14G/L MG/L P
14/04/22 15 30 0000 11.2 90 654 161 0.080 1.400 0.040 0.031
15 30 0005 11.1 9.2 154 169 0.090 1.400 0.060 0.016
74/07/11 15 05 0000 25.4 1.6 48 1210 9.10 113 0 .250 2.600 0.090 0.129
15 05 0002 25.4 7.8 1270 9.10 175 0.210 2.100 0.050 0.122
15 05 0006 25.4 7.6 1270 9.10 178 0.210 2.200 0.050 0.116
74/09/20 14 35 0000 17.5 8.2 31 1081 9.01 111 0.140 3.400 0.020K 0.058
14 35 0007 11.5 8,4 1083 9.09 173 0.140 3.300 0.020K 0.076
00665 32211 00031
DATE TIME DEPTH P1105-TOT CHLRPHYL INCOT LT
FROM OF A REMNING
TO DAY FEET MG/L P tJG/L PERCENT
74/04/22 15 30 0000 0.084 5.1
15 30 0005 0.084
74/07/11 15 05 0000 0.201 110.7
15 05 0002 0.194
15 05 0006 0.190
74/09/20 14 35 0000 0.197 50.0
14 35 0003 50.0
14 35 0006 5.0
14 35 0007 0.226
14 35 0008 1.0
K VALUE KNOWN TO BE
LESS THAN INDICATED
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