U.S. ENVIRONMENTAL PROTECTION AGENCY NATIONAL EUTROPHICATION SURVEY WORKING PAPER SERIES REPORT ON NORTH WURAY LAKE DAY COUNIY SOUTH DAKOTA EPA REGION VIII WORKING PAPER No, 628 CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON and ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA >G.P.O. 699-440 ------- REPORT ON NORTH WNJBAY LAKE DAY COUNTY SOUTH DAKOTA EPA REGION VIII WORKING PAPER No, G28 WITH THE COOPERATION OF THE SOUTH DAKOTA DEPARTMENT OF ENVIRONMENTAL PROTECTION AND THE SOUTH DAKOTA NATIONAL GUARD DECEMBER/ 1976 ------- 1 CONTENTS Page Foreward ii List of South Dakota Study Lakes iv Lake and Drainage Area Map v Sections :. Conclusions 1 II. Lake and Drainage Basin Characteristics 1 III. Lake Water Quality Sumary 3 IV. Nutrient Loadings 4 V. Literature Reviewed 8 VI. Appendices 9 ------- 11 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. RNALYTIC 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 [ lO6 and §305(b)] activities mandated by the Federal Water Pollution Control Act Amendments of 1972. ------- fl1 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 Comittee 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. ------- 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 Deerfield Pennington Enemy Swim Day Herman Lake John Hamlin Kampeska Codington Madison Lake Mitchell Davidson Norden Hami in East Oakwood Brookings West Oakwood Brookings Pactol a Penni ngton 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 ------- V I Grenville . Map Location 452! 4 2O— WAUBAY I / KE 0 X Lake Sampling Site 0 Km. 4 2 Scale Mi. 07’2Y 0730’ ------- NORTH WAUBAY LAKE STORET NO. 4631 I. INTRODUCTION North Waubay Lake was included in the National Eutrophication Survey as a water body of interest to the South Dakota Departments of Environmental Protection and Game, Fish and Parks. Tributaries and nutrient sources were not sampled, and this report relates only to lake sampling data. North Waubay Lake is located in an area of partly wooded grass- lands utilized mostly for pasture. The lake is adjacent to the Waubay National Wildlife Refuge and provides waterfowl habitat. Recurring winterkill prevents establishment of a significant sport fishery. II. CONCLLISIONS A. Trophic Condition: Survey data indicate that North Waubay Lake is eutrophic. It ranked twenty-first in overall trophic quality when the 31 South Dakota lakes sampled in 1974 were compared using a combination of six paranIeters*. Eleven of the lakes had less median total phosphorus, 15 had less median dissolved phosphorus, 16 had less median inorganic nitrogen, 27 had less mean chlorophyll a, and 19 had greater mean Secchi disc transparency. * See Appendix P . ------- 2 Survey limnologists noted that the general appearance of the lake was poor. Subuergent and emergent vegetation occupied about 40% of the littoral area, and algae blooms were in progress during the July and September sampling visits. Marked depression of dissolved oxygen (about 45% of saturation) occurred at sampling station 1 in July. B. Rate-Limiting Nutrient: A significant loss of nutrients in the assay sample occurred between the time of collection and the beginning of the assay, and the results are not indicative of conditions in the lake when the sample was taken (09/19/74). The lake data indicate nitrogen limitation in April, July, and September. ------- 3 III. LAKE AND DRAINAGE BASIC CHARACTERISTICS A. Lake Morphometrytt: 1. Surface area: 14.16 kilometers 2 . 2. Mean depth: 2.7 meters. 3. Maximum depth: 4.6 meters. 4. Volume: 38.232 x 106 m 3 . B. Precipitation*: 1. Year of sampling: 31.3 centimeters. 2. Mean annual: 51.1 centimeters. t Table of metric equivalents--Appendix B. tt Murphy, 1974. * See Working Paper No. 175 “...Survey Methods, 1973-1976”. ------- 4 IV. LAKE WATER QUALITY SUMMARY North Waubay 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 three stations on the lake and from two or more depths at each station (see map, page v). During each visit, a single depth—integrated (near bottom to surface) sample was composited from the stations for phyto- plankton identification and enumeration; and during the September visit, a single 18.9-liter depth—integrated sample was composited for algal assays. Also each time, a depth—integrated sample was collected from each of the stations for chlorophyll a analysis. The maximum depths sampled were 1.8 meters at station 1 and 1.5 meters at stations 2 and 3. The sampling results are presented in full in Appendix C and are surnarized in the following table. ------- A. SUMMARY OF PMYSICAL AND Cr,EMICAL CrIARACTEPISTICS FOII AUBAY STO ET COJE 4531 1ST SAMPLING ( 4/25/74) 2ND SAMPLING ( 7/11/74) 3 SITES I ANGE MEAN MEDIAN — 10.6 9.9 10.1 — 10.4 9. 9.b — 4310. 3294. 3451. 3 SITES 3Ru SAMPLING C 9/19/74) 3 SITES PAR AME TER TEMP (C) DISS OXY (MG/L) CNDCTVY (MCROP4O) PH (STAND UNITS) TOT ALK (HG/L) TOT P (MG/L) ORTMO P (MG/L) N02.Ni)3 (MG/LI AMMONIA (MG/L) KJEL N (MG/L) INOP & N (MG/I) TOTAL N (MG/I) CHLRPYL A (U(/L) SECCr4I (METERS) 8.2 8.6 2096. £ 2d. 0.053 0.010 0,0 70 0.060 2.700 0.140 2.7 70 1.4 0.8 — 374. — 0.156 — 0.045 — 0.120 — 0.230 — 3.303 — 0.330 - 3.400 — 30.1 — 1.7 24.7 3.6 3454. 8.9 364, 0.101 0.029 0.070 0.0 0 3 • 400 0. 1 0 3 • 4 O 67.8 0.3 MANGE — 25.2 - 7.6 — 7175. — 9.2 — 570. - 0.363 — 0.071 — 0.210 — 0.170 —12.400 — 0.380 —12.500 - 900.4 - 0.6 LAKE NOPT i 15.1 8.4 3003. 8.8 580. 0.069 0.014 0.020 0.040 3.300 0.060 3 • 320 6.2 0.6 277. 0.096 0.019 0.088 0.143 2 • 983 0,232 3.072 11.8 1.2 MEAN 24,9 6.0 5965. 9.0 445. 0.187 0.041 0.115 0.090 6.317 0.205 6.432 348 • 8 0 .S 308. 0.086 0.01o 0.080 0.135 2,900 0.230 3.000 3.9 1.0 MEDIAN 24,8 6.7 7134. 9.0 418. 0.121 0.035 0.095 0.075 3.950 0.180 4.030 78.3 0.6 RANGE — 15.8 - 9.2 - 5757. 8.8 — 950. — 0.158 — 0.048 - 0.030 — 0.110 — 4.300 — 0.140 — 4.330 — 42.1 — u.S ME AN 15.4 8.9 4781. 8.8 790. 0.094 0.024 0.065 3.800 0.090 3.825 2O. , 0.7 MEDIAN 15.2 9.0 558 . 8.8 850. 0.084 0.022 0.0 25 0.045 3.700 0.0 70 3.725 13.1 0.6 01 ------- 6 B. Biological characteristics: 1. Phytoplankton Sampling Dominant Algal Units Date Genera per ml 04/25/74 1. Suriella 291 2. C 1otella !2• 166 3. Chroococcus p. 125 4. Microcystis 2• 83 5. Amphiprora 83 Other genera 416 Total 1,164 07/11/74 1. Aphanizomenon . .a• 11,360 2. Phormidium 3,877 3. Chaetoceros 2,288 4. Chro coccus p. 1,435 5. Chroomonas 194 Other genera 736 Total 19,890 09/19/74 1. G1oeoçy tis (?) . .2• 4,061 2. Aphanizomenon !P. 1 ,684 3. 1 bdu1 aria . ia• 74 4. Chaetoceros p. 50 5. Nitzschia 25 Other genera 99 Total 5,993 2. Chlorophyll a - Sampling Station Chlorophyll a Date Number ( pg/i ) 04/25/74 1 30.1 2 3.9 3 1.4 07/11/74 1 900.4 2 67.8 3 78.3 09/19/74 1 42.1 2 13.1 3 6.2 ------- 7 C. Limiting Nutrient Study: A significant loss of nutrients occurred in the assay sample between the time of collection and the beginning of the assay, and the results are not indicative of conditions in the lake at the time the sample was taken (09/19/74). The lake data indicate nitrogen limitation in April, July, and September (the mean inorganic nitrogen to ortho- phosphorus ratios were 12/1, 5/1, and 4/1, respectively). ------- 8 V. LITERATURE REVIEWED Murphy, 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. Comm., Pierre. ------- 9 VI. APPENDICES APPENDIX A LAKE RANKINGS ------- LAICE DATA TO BE USED IN RANKINGS LAKE MED iAN MEDIAN 500- MEAN 15— MEDIAN CODE LAKE NAME TOTAL P It i0rtG N MEAN SEC CHLORA 11114 00 0155 0?tnO P 4601 LAKE ALBEPIT 0.321 0.110 489.111 106.289 9.200 0.01; 4602 ALVIN LAKE O.0b7 0.973 442,833 4 ,700 .4OO 0.0 17 4603 ANGOSTURA RESERVOIR 0.019 0.160 423 .333 3.111 13.000 0.005 4604 BRANT LAKE 0.194 0. 130 432.833 34.150 11.800 0.113 4605 LAKE BYRON 0.443 0.310 488.333 149.350 9.003 0.146 4606 CLEAR LAKE 0.021 0.075 430.167 11.983 8.600 0.009 4607 CLEAR LAKE 1.400 0.270 495.333 691.000 7.000 0.468 4608 COCHRANE LAKE 0.031 0.150 446.000 15.683 15.000 0.008 4609 COTTONWOOD LAKE 0.685 0.265 490.333 1 12.017 8.600 0.417 4610 OEERFIELO RESERVOIR 0.033 0.080 303.333 3.650 15.000 0.022 4611 ENEMY SWIM LAKE 0.031 0.085 442.600 14.200 8.200 0.013 4612 LAKE HERMAN 0.3 40 0.155 485.000 58. 133 8 .600 0.114 4613 ST JOHN LAKE 0.349 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 0.253 0.090 445.555 22.518 14.000 0.107 4616 LAKE MiTChELL 0.099 0.065 465.833 14.883 13.800 0.015 4617 LAKE WaRDEN 0.256 0.165 488.661 46.800 10.000 0.050 4618 OAKWOOD LAKE EAST 0.146 0.175 487.000 113.600 10.000 0.009 4619 OAKW000 LAKE WEST 0.181 0.135 465.833 159.667 9.aOo 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 15.633 9.600 0.009 4622 LAKE POINSETT 0.115 0.315 468.444 40.211 10.000 0.023 4623 LAKE REO IRON SOUTH 0.042 0.130 430.333 6.883 7.600 0.010 4624 RICHMOND LAKE 0.187 0.150 410.000 18.461 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 STOCKAOE LAKE 0.233 0.150 432.000 25.400 15.000 0.109 ------- LAKE DATA TO BE USED IN RANKINGS LAKE MEDIAN MEDIAN 500- MEAN iS- MEDIAN CODE LAKE NAME TOTAL P IIiOk (, N MEAN SEC C’1LO A MIN DO DISS O Tr.O 4629 LAKE VERMILLION 0.21 1 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 WAUBAY LAKE NORTH 0.09d 0.145 469.555 127.033 11.400 0.023 ------- PERCEPIT 0F LAKES WITrtH IGpiER VALUES (NUMaER OF LAKES WITH HIGHEP VALUES) LAKE MEDIAN MEDIAN 500— MEAN MEDIAN INDEX CODE LAKE NAME TOTAL P INORG N MEAN SEC CHLORA MIN DO DISS ORTHO P NO 4601 LAKE ALBERT 20 C 6) 20 C 6) 10 C 3) 23 C 7) 68 C 20) 60 C 18) 201 4602 ALVIN LAKE 67 C 20) 0 C 0) 57 C 17) 90 C 27) 63 C 19) 63 C 19) 340 4603 ANGOSTURA 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 C 8) 23 C 7) 260 4605 LAKE BYRON 10 ( 3) 3 C 1) 17 C 5) 7 C 2) 73 C 22) 13 C 4) 123 4606 CLEAR LAKE 93 C 28) 93 C 28) 83 C 25) 83 C 25) 77 C 23) 90 C 27) 519 4607 CLEAI LAKE 0 C 0) 10 C 3) 0 C 0) 0 C 0) 100 C 30) 0 C 0) 110 4608 COCHRANE LAKE 83 C 25) 40 C 11) 50 C 15) 67 C 20) 5 C 0) 93 C 28) 338 4609 COTTONwOOD LAKE 3 C 1) 13 C 4) 3 C 1) 20 C 6) 82 C 24) 3 ( 1) 124 4610 DEERFIELD RESERVOIR 90 C 27) 88 C 26) 97 C 29) 97 C 29) 5 C 0) 53 1 16) 430 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 C 5) 33 1 10) 27 C 8) 33 C 10) 82 ( 24) 10 1 3) 202 4613 ST JOHN LAKE 13 C 4) 88 C 26) 7 1 2) 13 C 4) 53 1 16) 43 C 13) 217 4614 LAKE KAMPESKA 33 1 10) 5 1 19) 40 C 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 16) 13 C 4) 30 1 9) 253 4616 LAKE MITCHELL 60 1 18) 82 C 24) 47 C 14) 73 4 22) 17 C 5) 70 C 21) 349 4617 LAKE NORDEN 23 C 7) 23 C 7) 13 C 4) 40 C 12) 45 C 12) 40 C 12) 184 4618 OAKWOO() LAKE EAST 53 4 16) 17 C 5) 20 4 6) 17 4 5) 45 C 12) 85 C 25) 237 4619 OAKW000 LAKE WEST 50 C 15) 50 C 15) 23 C 7) 3 4 1) 58 4 17) 57 4 17) 241 4620 PACTOt..A RESERVOIR 100 4 30) 98 4 29) 100 C 30) 100 C 30) 35 C 10) 97 C 29) 530 4621 PICKEREL LAKE 73 C 22) 73 ( 22) 67 C 20) 63 C 19) 58 C 17) 85 C 25) 419 4622 LAKE POINSETT 57 4 17) 7 C 2) 43 4 13) 43 4 13) 45 C 12) 47 4 14) 242 4623 LAKE RED IRON SOUTH 77 4 23) 58 4 17) 80 C 24) 87 4 26) 93 C 28) 78 C 23) 473 4624 RICHMOND LAKE 47 C 14) 40 C 11) 90 4 27) 60 ( 18) 45 ( 12) 17 C 5) 299 4625 ROY LAKE 87 4 26) 98 4 29) 77 C 23) 80 4 24) 35 C 10) 78 C 23) 455 4626 SAND LAKE 7 4 2) 58 C 17) 33 C 10) 30 C 9) 23 C 7) 7 4 2) 158 4627 SHERIDAN LAKE 70 ( 21) 65 C 19) 93 C 28) 70 C 21) 5 C 0) 67 C 20) 370 - 28 KA - iCE 30 - C 7 !2) -0 ‘ 27 ‘ ‘ ) 22 ------- PEQCEI.IT OF LAKES WITH HIGhER VALUES (NUMaER OF LAKES WITH MIGMEW ‘!ALUES) LME MEL) IAN MEDIAN 500— MEAt’ 15 MEDIAN INDEX CODE LAKE NAME TOTAL P LNOQG N MEAN SEC 2PILORA MIN DO DISS ORTr’O P NO ‘.629 LAKE VERMILLION 37 ( 11) 70 ( 21) 30 C 9) 27 C 8) 68 ( 20) 33 1 10) 265 4630 WALL LAKE 43 C 13) 27 ( 8) 63 C 19) 37 C 11) 97 ( 29) 37 C 11) 304 4631 WAUBAY LAi E NORTH 63 C 19) 47 C 14) 37 C 11) 10 C 3) 30 1 9) 50 C 15) 237 ------- LAKES RANKED BY INDEX NOS. RANK LAKE CODE LAKE NAME INDEX NO 1 4620 PACTOLA RESERVQ’IR 530 2 4606 CLEAR LAKE 519 3 4623 LAKE RED IRON SOUTH 473 4 4611 ENEMY SWIM LAKE 460 5 S’ 625 ROY LAKE 455 6 4610 DEERFIELD RESERVOIR 430 7 4603 ANGOSIURA 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 RICpIMOND LAKE 299 16 4629 LAKE VERHILLION 265 17 4604 BRANT LAKE 260 18 4 5 MADISON LAKE 253 19 4622 LAKE POINSETT 242 20 4619 OAKW000 LAKE WEST 241 21 4631 WAUBAY LAKE NORTH 237 22 4618 OAKWOOD LAKE EAST 237 23 4628 STOCKADE LAKE 225 24 4613 ST JOHN LAKE 217 25 4612 LAKE HERMAN 202 26 4601 LAKE ALBERT 201 27 4617 LAKE NORDEN 184 28 SAl” ‘ KE ------- LAKES RAIIKEO 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 ------- APPENDIX B CON YE RS TON 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 lbs/square mile ------- APPENDIX C PHYSICAL and CHEMICAL DATA ------- STORET RETRIEVAL JATE 75/11/07 463101 ‘.5 23 30.0 096 27 00.0 WAIJbAY LAr.E gOr’Tn 4603? SO u l OAKOT* 1 IEPALES at 2111202 0008 FEET DEPTH 00665 32217 DEPTH P1105-TOT CtILRPHYL A MG/L P LIG/L 14/04/25 14 15 0000 14 15 0005 74/07/11 10 05 0000 10 05 0006 74/09/19 13 10 0000 13 10 0004 13 10 0005 13 10 0007 0.0 92 0.156 0.310 0.363 U .096 i i . 158 00031 ZICOT LT REMNING PERCENT 00010 00300 00017 0(.09 00400 00410 00610 00b2 5 00630 00671 DATE T iME DEPTH WATER DO TNANSP CNDUCTVY Ph T ALK Nr13—N TOT KJEL u402s1i03 PHOS—DIS FROM OF TEMP SECCH I FIELD CACO3 TOTAL N N—TOTAL ORFriO TO DAY FEET CENT MG/L INCHES MICROMMO SU MG/L MG/L MG/L M (p/L MG/L r’ 14/04/25 14 15 0000 10.1 38 2161 314 0.010 2.800 0.080 0.0 14 14 15 0005 10.0 9.6 2096 215 0.06u 2.900 0.080 0.045 14/07/11 10 05 0000 25.2 3.6 12 3725 9.20 364 0.110 12.400 0.100 0.048 10 05 0006 25.2 3.8 3454 9.20 318 0.170 10.400 0.210 0.011 14/09/19 13 10 0000 15.2 8.4 30 3003 6.82 580 0.110 4.200 0.030 0.022 13 10 0005 15.2 8.8 3003 8.83 625 0.110 4.300 0.030 0.048 DATE FROM TO TIME OF DAY FEET 30 • 1 900.4 42.1 50.0 1.0 ------- STORET RETRIEVAL DATE 75/11/07 463102 45 24 30.0 096 25 30.0 AUBAY LAr(E NO TM 46037 SO(TH OA c0TA 1IEPALES 2111202 0007 FEET DEPTH 00010 00300 u0077 00094 00400 00410 00610 00625 00630 00671 DATE TIME DEPTH WATER DO TRANSP CNDUCTVY PH T ALI( NPI3—N TOT i(JEL N02&N03 PrIOS-L)IS FROM OF TEMP SECCHI FIELD CACO3 TOTAL N N—TOTAL ORTrIO TO DAY FEET CENT MG/L INCHES MICROMHO SU MG/L MG/L MG/L MG/I M ,/L P 74/04/25 14 30 0000 10.3 33 3460 340 0.120 2.700 0.070 0.010 14 30 0005 8.2 8.6 3442 174 0.150 2.900 0.120 0.020 74/07/11 10 25 0000 24.7 6,6 24 7165 9.00 455 0.090 3.800 0.140 0.029 10 25 0005 24.7 6.8 7175 9.00 570 0.060 3.400 0.080 0.041 74/09/19 13 25 0000 15.7 9.0 23 5157 8.80 950 0.050 3.800 0.030 0.015 13 25 0005 15.8 9.0 5753 8.82 820 0.0’.0 3.300 0.020 0.023 00665 32217 00031 DATE TIME DEPTH PHOS—TOT CHLRPHYL INCDT LT FROM OF A REMNING TO DAY FEET MG/L P UG/L PERCENT 74/04/25 14 30 0000 0.080 3.9 14 30 0005 0.128 74/07/11 10 25 0000 0.103 67.8 10 25 0005 0.126 74/09/19 13 25 0000 0.069 13.1 13 25 0005 0.087 ------- SIORET RETRIEVAL DATE 75/11/07 463103 45 26 00 .0 096 22 30.0 WAU8AY LAKE NORTH 46031 SOUTH DAKOTA I 1EPALES 2111202 4 0010 FEET DEPTH 00010 00300 00071 00094 00400 00410 00610 00625 00630 00671 DATE TIME DEPTH WATER DO TRANSP CNDUCTVY PH T ALK 1*13—N TOT KJEL N02&NO3 PHOS—DIS FROM OF TEMP SECCHI FIELD CACO3 TOTAL N N—TOTAL ORTHO TO DAY FEET CENT MG/L INCHES MICROM1IO S I ) MG/L MG/L MG/L MG/ I . MG/ I . P 74/04/25 14 45 0000 10.6 66 4310 310 0.230 3.300 0.100 0.010 14 45 0005 10.1 10.4 4292 128 0.230 3.300 0.080 0.018 74/07/11 10 45 0000 24.8 7.6 24 1134 8.90 380 0.050 3.900 0.010 0.030 10 45 0005 24.8 7.6 7134 8.90 520 0.060 4.000 0.090 0.029 14/09/19 13 SO 0000 15.2 9.2 24 5587 8.19 880 0.040 3.600 0.020 0.014 13 50 0005 15.1 9.2 5583 8.83 885 0.040 3.600 0.020 0.024 00665 322 17 00031 DATE TIME DEPTH PHOS—TOT CHLRPHYL INCDT LT FROM OF A REMNING TO DAY FEET MG/L P UG/L PERCENT 14/04/25 14 45 0000 0.053 1.4 14 45 0005 0.068 74/07/11 10 45 0000 0.111 78 .3 10 45 0005 0.101 74/09/19 13 50 0000 0.072 6.2 13 50 0004 50.0 13 50 0005 0.081 13 50 0008 4.0 ------- |