U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LAKE MITQELL
DAVISON COUNTY
SOUin DAKOTA
EPA REGION VIII
WORKING PAPER No, 613
COR V ALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORY A LLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
699-440
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REPORT
ON
LAKE MITCHELL
DAVISOf-J COUNTY
SOUTH DAKOTA
EPA REGION VIII
WORKING PAPER No, 613
WITH THE COOPERATION OF THE
SOUTH DAKOTA DEPARTMENT OF ENVIRONMENTAL PROTECTION
AND THE
SOUTH DAKOTA NATIONAL GUARD
JANUARY/ 1977
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I
CONTENTS
Page
Foreward
List of South Dakota Study Lakes iv
Lake and Drainage Area Map
Sections
1. Conclusions 1
II. Lake and Drainage Basin Characteristics i
III. Lake Water Quality Suninary 2
IV. Nutrient Loadings 3
V. Literature Reviewed 7
VI. Appendices 8
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration corimiitnient 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)], water
quality criteria/standards review [ 3O3(c)], clean lakes [ 3l4(a,b)],
and water quality monitoring [ flO6 and §305(b) ] activities mandated
by the Federal Water Pollution Control Act Amendments 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 Connittee 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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lv
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
Deerfi el d Penni ngton
Enemy Swim Day
Herman Lake
John Hamlin
Kampeska Codi ngton
Madison Lake
Mitchell Davidson
Norden Hamlin
East Oakwood Brookings
West Oakwood Brookings
Pactola Pennington
Pickerel Day
Poinsett 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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I
I ,
LAKE MITCHELL
0 TrIbutary Sa ip1 Ing Site
X Lake Sampflng Site
‘P ‘? __ Km.
“0 Mi.
Sca’e
_
Map Locat, n
/
5
)
I 4KE
/
9M JO
-------
LAKE MITCHELL
STORET NO. 4616
I. INTRODUCTION
Due to lack of flows, only a few tributary samples and no outlet
samples were taken; therefore, this report relates only to the lake
sampling data. However, the few sampling data obtained are included
in Appendix D for the record.
II. CONCLUSIONS
A. Trophic Condition:
Survey data indicate Lake Mitchell is eutrophic. It ranked
tenth in overall trophic quality when the 31 South Dakota lakes
sampled in 1974 were compared using a combination of six lake
parameters*. Twelve of the lakes had less median total phosphorus.
nine had less median dissolved orthophosphorus, five had less and
one had the same median inorganic nitrogen, eight had less mean
chlorophyll ! and 16 had greater mean Secchi disc transparency.
Marked depression of dissolved oxygen with depth occurred at
station 1 in July.
B. Rate-Limiting Nutrient:
The algal assay results indicate Lake Mitchell was nitrogen
limited at the time the assay sample was taken (04/23/74). The
lake data indicate nitrogen limitation all three sampling times.
* See Appendix A.
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2
III. LAKE CHARACTERISTICSt
A. Lake Morphometrytt:
1. Surface area: 2.71 kilometers 2 .
2. Mean depth: 3.7 meters.
3. MaxImum depth: 8.8 meters.
4. Volume: 10.027 x 106 m 3 .
B. Precipitation*:
1. Year of sampling: 32.9 centimeters.
2. Mean annual: 56.1 centimeters.
.F Table of rnetr conversions--Appendix B.
ft Murphey, 1974.
* See Working Piper No. 175, “...Survey Methods, 1973-1976”.
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3
P d. LAKE WATER QUALITY SUMMARY
Lake Mitchell 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 a
number of depths at two stations on the lake (see map, page v). 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 19.9—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 6.1 meters at
station 1 and 3.4 meters at station 2.
The sampling results are presented in full in Appendix C and are
sunuiarized in the following table.
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iIf4M .fl’ OF Pr YSICAL ANt)
1ST SAMDLIN& 1 4/23/74)
2 SITEs
ChEMiCAL Cna ALTE I’,1iCS Fu LA.c€ M1TC ELL
STOiQET CU’JE 4610
2NL’ SAM#LING 1 7/11/ 7’.)
2 bITES
3kD SAMi’ L1NG 1 9/18/74)
a SITES
PAMAMETER
RANGE
M€At
MEDIAN
RAN 1,
TEMP (C)
10.4
— 10.3
10.6
10.5
23.6
— 26.0
2’..9
24.5
17.4
— 19.2
18.6
19.0
0155 Dx v ( ‘lOlL)
9,6
9.8
4. 7
9.6
1.2
— 7.4
4.8
5.0
6.2
— 9.8
8.9
9.6
CNDCTVY (MCPOMO)
451.
— 633.
532.
503.
1073.
— 1119.
1096.
1087.
983.
— 1031.
1012.
lOll.
Ph (STAND UNITS)
8.2
— 8.3
8.2
8.3
8.0
— 8.6
8.3
8.3
1.?
— 8.u
7.9
7.9
TOT AIX (MG/i)
159.
— 166.
162.
loG.
185.
— 192.
l 7.
187.
189.
— 195.
191.
190.
TOT P (MG/L I
- 0.088
— 0.108
0.091
0.097
0.115
— J.155
0.137
0.137
0.074
— 0.106
0.084
0.080
ORTHO P (MG/I)
0.005
— 0.01?
0.008
0.008
0.065
— 0.091
0.082
0.063
0.0 10
— 0.025
0.01’,
0.015
N02.N03 (MG/LI
0.030
— 0.060
0.0 0
0.040
0.060
— 0.080
3.073
0.080
0.020
— O.0iU
0.022
0.020
AMMONIA (MG/L)
0.020
— u.040
0 .033
0.030
0.060
— 0.400
0.164
(1.100
0.030
— 0.070
0.038
0.030
KJEL N (MG/I)
0.900
— 1.400
1.02
1.000
0. o0
— 1.200
0.986
1.000
0.800
— 1.300
1.017
0.950
INOr b N (MG/I)
0.050
— 0.100
0.07’
0.07u
0.120
— 0.460
0.237
0.180
0.050
— 0.100
0.060
0.050
TOTAL N (MG/I)
0.930
— 1.460
1.069
1.030
0.880
— 1.280
1.OSY
1.060
0.d20
— 1.320
1.03a
0.970
CHLN”VL A (LJG/L)
13.6
— 13.9
13.1
13.7
7.0
— 37.3
22.1
22.1
7.2
— 10.4
8.7
8.7
SECC 4I (METERS)
0.6
— 0.7
0.S
0.0
0.9
— 1.2
1.1
1.1
0.9
— 0.9
0.9
0.9
a
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5
B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
04/23/74
Dominant
Genera
1. Dac ylococc psis p.
2. Crucigenia • p-.
3. Nitzschia p.
4. Scenedesmus . jl.
5. Microcystis p.
Other genera
Total
Algal Units
per ml
5,184
2,641
1 ,907
294
49
1 ,244
10,319
1. Oscillatoria p.
2. Carteria . .2.•
3. ITactylococcopsis p.
4. Crucigenia . 2.•
5. Eu 1ena p.
Other genera
1
2
1
2
7.0
37.3
7.1
10.4
627
502
502
314
314
815
Total 3,074
07/11/74
09/18/74
2. Chlorophyll a -
Sampling
Date
04/23/74
07/11/74
09/18/74
2,254
2,1 58
2,014
1 ,678
1 ,582
10,119
1. Phormidium
2. Dac ococcopsis . p.
3. 1 1ir i smofredTä .
4. Chroomonas .
5. Scenedesmus .
Other genera
Station
Number
1
2
Total 19,805
Chlorophyll a
( pg/i )
13.9
13.6
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6
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N
pike (mg/l) Conc. (mg/l) Conc. (mg/i )
Control 0.020 0.043
0.050 P 0.070 0.043
0.050 P + 1.0 N 0.070 1.043
1.0 N 0.020 1.043
Maximum yield
iL dry wt. )
1.1
1.6
24.4
12.8
2. Discussion —
The control yield of the assay alga, Selenastrum capri—
cornuti i , indicates that the potential primary productivity
of Lake Mitchell was moderately high at the time the sample
was taken (04/23/74). The significant increase in yield when
nitrogen was added alone, and the lack of response to the
addition of only phosphorus, indicate that the lake was nitro-
gen limited at that time.
The lake data indicate nitrogen limitation at all sampling
times; i.e., the mean inorganic nitrogen to orthophosphorus
ratios were 9 to 1 in April, 3 to 1 in July, and 4 to 1 in
September, and nitrogen limitation would be expected.
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7
V. LITERATURE REVIEWED
Ketelle, Martha J., and Paul D. Uttormark, 1971. Problem lakes in
the United States. EPA Water Poll. Contr. Res. Ser. Proj. 16010
EHR, Wash., DC.
Murphey, Duane G., 1974. Personal communication (lake morphometry).
SD Dept. of Env. Prot., Pierre.
Petri, Lester R., and L. Rodney Larson, 1966 (?). Quality of water
in selected lakes of eastern South Dakota. Rept. of. mv. #1,
SD Water Res. Corn., Pierre.
Sctv iidt, Artwin E., 1967. Limnology of selected South Dakota lakes.
MS thesis, SD St. U., Brookings.
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8
Vi. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAKE MEDIAN MEDIAN 500— MEAN 15- MEDIAN
CODE LAKE NAME TOTAL P INOI G N MEAN SEC CHLORA MIN DO DISS ORTHO P
6601 LAKE ALBERT 0.321 0.170 489.111 106.289 9.200 0.019
4602 ALVIN LAKE 0.06? 0.910 442.833 4.700 9.400 0.017
4603 ANGOSTURA RESERVOIR 0.019 0.160 423.333 3.717 13.000 0.005
4604 BRANT LAKE 0.194 0,130 432.833 34.150 11.800 0.113
4605 LAKE BYRON 0.443 0.370 488.333 149.350 9.000 0.146
4406 CLEAR LAKE 0.027 0.075 4 O.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 DEERFIELD RESERVOIR 0.033 0.080 303.333 3.650 15.000 0.022
46)1 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 0.348 0.080 489.400 120.880 9.800 0.025
4614 LAKE KAMPESKA 0.220 0.105 468.889 20.567 8.200 0.128
4615 MADISON LAKE 0.25 0.090 445.555 22.578 14.000 0.107
4616 LAKE MITCHELL 0.099 0.085 465.833 14.883 13.800 0.015
4617 LAKE NORDEN 0.256 0.165 488.667 46.800 10.000 0.050
4618 OAKWOO() LAKE EAST 0.1’ 6 0.175 487.000 113.600 10.000 0.009
4619 OAK OOO LAKE WEST 0.181 0.135 485.833 159.667 9.bO O 0.021
4420 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 IRON 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
4628 STOCKADE LAKE 0.233 0.150 432.000 25.400 15.000 0.109
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LAKE DATA TO BE USED IN RANIUNGS
LAKE MEDIAN MEDIAN 500— MEAN IS— MEDIAN
CODE LAKE NAME TOTAL P INORG N MEAN SEC Ch 1 ..ORA HIN 00 DISS ORTHO 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 55.267 7.400 0.076
4631 WAU AY LAKE NORTH 0.098 0.145 469.555 127.033 11.400 0.023
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LAKE MEDIAN MEDIAN 500— MEAN 15— MEDIAN INDEX
CODE LAKE NAME TOTAL P INORG N MEAN SEC CHLORA MIN DO OISS ORTUIG P NO
4601 LAKE ALBERT 20 C 6) 20 C 6) 10 C C 23 7) 68 C 20) 60 C 18) 201
46 ’02 ALVIN LAKE 67 C 20) 0 0) 57 1 17) 90 1 27) 63 C 19) 63 C 19) 340
4603 ANGOSTUPA RESERVOIR 97 C 29) 30 C 9) 87 C 26) 93 C 28) 20 ( 6) 100 1 30) 427
4604 BRANT LAKE 40 C 12) 53 C 16) 70 C 21) 47 C 14) 27 ( 8) 23 C 7) 260
4605 LAKE BYRON 10 1 3) 3 C 1) 17 ( 5) 7 C 2) 73 C 22) 13 1 4) 123
4606 CLEAR LAKE 93 C 28) 93 C 28) 83 1 25) 83 C 25) 77 C 23) 90 1 27) 519
4607 CLEAR LAKE 0 1 0) 10 1 3) 0 C 0) 0 C 0) 100 C 30) 0 C 0) 110
4603 COCHRANE LAKE 83 C 25) 40 1 11) 50 C 15) 67 1 20) 5 C 0) 93 C 28) 338
4609 COTTONwOOD LAKE 3 1 1) 13 1 4) 3 ( 1) 20 C 6) 82 1 24) 3 C 1) 124
4610 DEERFIELD RESERVOII 90 C 27) 88 1 26) 97 C 29) 97 C 29) 5 C 0) 53 C 16) ‘.30
4611 ENEMY SWIM LAKE 80 C 24) 82 C 24) 60 C 18) 77 1 23) 88 C 26) 73 1 22) 460
4612 LAKE HERMAN 17 1 5) 33 ( 10) 27 1 8) 33 1 10) 82 C 24) 10 C 3) 202
4613 ST JOHN LAKE 13 1 4) 88 C 26) 7 ( 2) 13 1 4) 53 C 16) 43 C 13) 217
4614 LAKE KAMPESKA 33 1 10) 65 1 19) 40 1 12) 57 C 17) 88 C 26) 20 C 6) 303
4615 MADISON LAKE 27 C 8) 77 1 23) 53 C 16) 53 1 18) 13 ( 4) 30 C 9) 2 3
4616 LAKE MITCHELL 60 C 18) 82 C 24) 47 C 14) 73 C 22) 17 C 5) 70 C 21) 349
4617 LAKE NORDEN 23 1 7) 23 C 7) 13 C 4) 40 C 12) 45 C 12) 40 ( 12) 184
4618 OAKW000 LAKE EAST 53 ( 16) 17 1 5) 20 C 6) 17 C 5) 45 C 12) 85 C 2) 237
4619 OAKW000 LAKE WEST 50 1 15) 50 C 15) 23 C 7) 3 1 1) 58 C 17) 57 C 17) 241
4620 PACTOLA RESERVOIR 100 C 30) 98 C 29) 100 C 30) 100 C 30) 35 C 10) 97 C 29) 530
4621 PICKEREL LAKE 73 C 22) 73 C 22) 67 C 20) 63 C 19) 58 1 17) 85 1 25) 419
4622 LAKE POINSETT 57 C 17) 7 C 2) 43 C 13) 43 C 13) 45 C 12) 47 1 14) 242
4623 LAKE RED IRON SOUTH 77 1 23) 58 C 17) 80 C 24) 87 C 26) 93 C 28) 78 1 23) 473
4624 RICHMOND LAKE 47 C 14) 40 ( 11) 90 C 27) 60 C 18) 45 C 12) 17 C 5) 299
4625 ROY LAi E 87 1 26) 98 1 9) 77 ‘C 23) 80 C 24) 35 ‘C 10) 78 -C 23) 455
4626 SAND LAKE 7 C 2) 58 ( 17) 33 C 10) 30 ( 9) 23 1 7) 7 C ) 158
4627 SHERIDAN LAKE 70 C 21) 65 C 19) 93 C 28) 70 1 21) 5 1 0) 67 1 0) 370
4628 STOCKADE LAKE 30 C 9) 40 C 11) 73 C 22) 50 C 15) 5 C 0) 27 1 8) 225
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PERCENT OF LAKES WITH HIGHER VALUES eNUMaER OF LAKES wITH HIGHER VALUES)
LAKE MEDIAN MEDIAN 500— MEAN 15— MEDIAN INDEX
CODE LAKE NAME TOTAL P INORG N MEAN SEC CMLORA MIN DO DISS ORTHO P NO
4629 LAKE VERMILLION 37 ( U) 70 ( 21) 30 ( 9) 27 ( 8) 68 C 20) 33 C 10) 265
4630 WALL LAKE 43 C 13) 27 C 8) 63 C 19) 37 C 11) 97 C 29) 37 C 11) 304
4631 WAUBAY LAKE NORTH 63 C 19) 47 C 14) 37 C 11) 10 C 3) 30 C 9) 50 C 15) 237
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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 DEERFIELO 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 RICHMOND 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 PIERMAN 202
26 4601 LAKE ALBERT 201
27 4617 LAPSE NOROEN 184
28 4626 SAND LAKE 158
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LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
29 4609 COTTONWOOD LAKE 124
30 4605 LAKE BYRON 123
31 4607 CLEAR LAKE 110
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APPENDIX B
CONVERSION FACTORS
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CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x = 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
Kilogramsfsquare kilometer x 5.711 lbs/square mile
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APPENDIX C
PHYSICAL and CHEMICAL DATA
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STDRET RETRIEVAL DATE 76/05/03
461601
43 44 22.0 098 01 50.0 3
LAKE. ‘4 IIChtLL
46035 SOUTi I 0A1014
090691
1 IEPALES 2111202
00 FEET DEPTh CLASS 00
00010 00300 00077 00094 00400 00410 00610 00625 00630 00671
DATE TIME DEPTH WATER DO TRANSP CPIDUCTVY PH T ALK hDii—N TOT KJEL N0 &NO3 PHOS—CIS
FROM OF TEMP SECCHI FIELD CACO3 TOTAL N N-TOTAL ORTHO
TO DAY FEET CENT MG/L iNCHES MICROMNO SU MG/L MG/L MG/L MG/L MG/L P
74/04/23 09 45 0000 10.5 26 462 8.30 166 0.040 1.400 0.060 0.011
09 z.5 0005 10.4 9.6 497 8.30 166 0.030 0.900 0.040 0.010
09 45 0015 10.4 9.8 591 6.25 164 0.040 1.000 0.050 0.012
09 45 0020 10.4 9.6 633 6.20 too 0.040 0.900 0.040 0.007
74 (01/11 13 35 0000 P4 .5 5.0 48 1087 8.30 185 0.100 1.000 0.080 0.065
13 35 0005 24.3 3.8 1082 8.20 186 0.150 0.800 0.080 0.015
13 35 0015 23.9 1.8 1076 8.00 188 0.300 1.000 0.080 0.097
13 35 0020 23.6 1.2 1073 8.00 192 0.400 1.000 0.060 0.090
74/09/18 15 30 0000 19 .2 9.8 36 1018 8.00 189 0.040 0.900 0 .020K 0.010
15 30 0005 18.1 8.2 993 7.90 189 0.030 0 .900 0.020K 0.010
15 30 0014 17.4 6.2 983 7.72 189 0.030 0.800 0.020K 0.015
00665 32217 00031
DATE TIME DEPTH PHDS-TDT CHLRPHYL INCDT LT
FROM OF A REMNING
TO DAY FEET MG/I P U6/L PERCENT
74/04/23 09 45 0000 0.097 13.9
09 45 0005 0.068
09 45 0015 0.090
09 45 0020 0.100
74/01(11 13 35 0000 0.115 7.0
13 35 0005 0.149
13 35 0009 1.0
13 35 0015 0.137
£3 35 0020 0.140
74/09/18 15 30 0000 0.080 7.1
15 30 0005 0.074
15 30 0006 1.0
15 30 0014 0.081
K VALUE KNOWN TO SE
LESS THAN INDICATED
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STORET RETRIEVAL DATE 76/05/03
461602
43 45 35.0 098 03 15.0 3
LAKE MJTC’tLL
46035 S ouTh DAKOTA
090691
I 1EPALES
0016 FEET
2 111202
UEPTH CLASS 00
74/0 ’/23 10 10 0000
10 10 0005
10 10 0010
74/07/il 13 iS 0000
13 15 0005
13 15 0006
13 15 0011
74/09/18 15 10 0000
15 10 0005
15 I a 0010
00665 32217
P 1105-TOT CHLRPHYL
A
MG/L P UG/L
00031
INCDT LT
REMNING
PER CENT
DATE
TIME
DEPTH
FROM
OF
TO
DAY
FEET
14/04/23
10 10
10 10
10 10
0000
0005
0010
74/01/it
13 iS
13 15
13 IS
0000
0005
0011
74/09/18
15 10
15 10
15 10
0000
0005
0010
DATE
TIME
DEPTH
FROM
OF
TO
DAY
FEET
00010
00300
00077
00094
00400
00410
00610
00625
00630
00611
WATER
DO
TRANSP
CNDUCTVY
Pri
T ALK
NH3—N
TOT KJEL
NO2 NO3
P tOS—uIs
TEMP
5ECCHI
FIELD
CACO3
TOTAL
N
N—TOTAL
ORTHO
CENT
MG/L
INCHES
MICROMHO
SU
MG/I
MG/L
MG/L
MG/L
MG/L P
10.8
23
451
8.25
159
0.030
1.100
0.030
0.008
10.1
9.6
503
8.20
159
0.020
1.000
0.030
0.005
10.1
9.8
590
8.20
159
0.030
0.900
0.030
0.006
26.0
7.2
36
11 19
8.60
181
0.0d0
1.200
0.080
0.083
26.0
1.4
1118
8.60
189
0.060
1.000
0.060
0.081
26.0
7.0
1119
8.60
185
0.060
0.900
0.070
0.085
19.2
9.6
36
1037
1.96
195
0.010
1.200
0.030
0.025
19.2
9.8
1027
1.95
192
0.030
1.000
0. 020K
0.015
18.8
9.6
1016
1.95
190
0.030
1.300
0.020K
0.016
13.6
31 • 3
0.094
0.099
0.108
0.155
0.129
0.133
0. 106
0.084
0 • 078
1.0
1.0
K VALUE KNOWN TO 8€
LESS THAN INDICATED
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APPENDIX D
TRIBUTARY DATA
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STOR(T ETR1EVAL DATE 76/05/04
‘salt 42
43 46 00.0 098 06 20.0 4
FIRES TEEL Ckci)c
45 7.5 LOOMIS
1/LAKE PIITCrIELL 090691
bi?JG ON SEC r
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TRIBUTARY FLOw INFORMATION FOR SOUTH DAKOTA
LA’CE CODE 4616 MITCHELL
TOTAL OqAINAGE AREA OF LA (E(SO CM) 1522.9
SUB-DRAINAGE NORMALIZED FLOWS(CMS)
TRI8UTARY AREA(S0 1CM) JAN FEB MAR APR MAY JUN JUL AUG SEP OcT NOV DEC MEAN
46) 6A1 1522.9 0.01’ 0.110 1.897 2.662 1,614 2.209 0.368 0.212 0.0 0.0 0.0 0.0 0.758
4616A2 1471.1 0.048 0.142 1.869 2.605 1.586 2.180 0.396 0.241 0.014 0.006 0.003 0.006 0.758
4616ZZ Si.8 0.0 0.0 0.0 0.028 0.028 0.028 0.0 0.0 0.0 0.0 0.0 0.0 0.007
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 1522.9 TOTAL FLOW IN = 9.18
SUM OF SUB—DRAINAGE AREAS = 1522.9 TOTAL FLOW OUT = 9.09
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
4616A1 10 74 0.0 12 0.0
11 74 0.0 9 0.0
12 74 0.0 15 0.0
1 75 0.0 19 0.0
2 75 0.0 7 0.0
3 75 0.0 8 0.0
4 75 0.0 12 0.0
5 75 0.0 12 0.0
6 75 0.0 9 0.0 23 0.0
7 75 0.0 14 0.0
8 75 0.0 11 0.0
9 75 0.0 15 0.0
4616A2 10 74 0.006 12 0.003
11 74 0.003 9 0.003
12 74 0.008 15 0.014
1 75 0.006 19 0.006
2 75 0.006 7 0.006
3 75 0.057 8 0.028
4 75 0.057 12 0.028
5 75 0.028 12 0.006
6 75 0.014 9 0.006 23 0.0
7 75 0.0 14 0.0
8 75 0.0 11 0.0
9 75 0.0 15 0.0
4616ZZ 10 74 0.0
11 74 0.0
12 74 0.0
1 75 0.0
2 75 0.0
3 75 0.0
4 75 0.014
5 75 0.014
6 75 0.0
7 75 0.0
8 75 0.0
9 75 0.0
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