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Current Conditions for South Dakota: Streamflow -- 172 site(s) found

PROVISIONAL DATA SUBJECT TO REVISION




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Station
Number 		Station name Date/Time Gage
height,
feet 		Dis-
charge,
ft3/s 		Long-
term
mean
flow
4/26 		Stream
water
level
above
NAVD
1988,
feet
Group Undefined
06466010 Missouri River nr Niobrara, Nebr.  04/26 17:15 CDT 16.91 --     --- -- 
Group MINNESOTA RIVER BASIN
05290000 LITTLE MINNESOTA RIVER NEAR PEEVER, SD  04/26 17:00 CDT 11.39 129 181 1,028.12 
05291000 WHETSTONE RIVER NEAR BIG STONE CITY, SD  04/26 17:45 CDT 1.97 111 140 997.09 
Group LITTLE MISSOURI RIVER BASIN
06334500 LITTLE MISSOURI RIVER AT CAMP CROOK,SD  04/26 16:45 MDT 2.13 25.9 182 -- 
06335500 LITTLE MISSOURI RIVER AT MARMARTH, ND  04/26 17:00 CDT 1.26 58.5 432 2,689.37 
Group MISSOURI-OAHE RIVER BASIN
06342500 MISSOURI RIVER AT BISMARCK, ND  04/26 17:15 CDT 4.85 16,900 20,700 1,624.49 
06354881 OAK CREEK NR RATTLESNAKE BUTTE NR WAKPALA, SD  04/26 16:45 MDT 4.23 24.3 47.0 -- 
Group GRAND-MOREAU RIVER BASIN
06354890 NORTH FORK GRAND RIVER ABOVE BOWMAN-HALEY LAKE, ND  04/26 17:00 CDT 23.15 84.8     --- 2,753.91 
06354980 SPRING CREEK NEAR HALEY, ND  04/26 17:00 CDT 23.02 1.04     --- 2,755.44 
06355500 NORTH FORK GRAND RIVER NEAR WHITE BUTTE,SD  04/26 16:45 MDT 1.11 8.34 91.0 -- 
06356500 SOUTH FORK GRAND RIVER NEAR CASH,SD  04/26 16:15 MDT 0.88 15.1 69.0 -- 
06357600 GRAND RIVER NEAR THUNDER HAWK, SD  04/26 16:00 MDT 5.35 74.8     --- -- 
06357800 GRAND RIVER AT LITTLE EAGLE,SD  04/26 16:15 MDT 3.32 154 492 1,629.10 
06359500 MOREAU RIVER NEAR FAITH,SD  04/26 15:45 MDT 1.21 40.0 197 -- 
06360500 MOREAU RIVER NEAR WHITEHORSE,SD  04/26 16:45 MDT 3.08 130 491 -- 
06361000 MOREAU RIVER AT PROMISE SD  04/26 16:30 MDT 8.34 --     --- -- 
Group CHEYENNE RIVER BASIN
06386500 CHEYENNE RIVER NEAR SPENCER, WY  04/26 16:45 MDT 4.23 15.5 14.0 -- 
06395000 CHEYENNE RIVER AT EDGEMONT,SD  04/26 16:00 MDT 1.51 32.5 47.0 -- 
06400000 HAT CREEK NEAR EDGEMONT,SD  04/26 16:15 MDT 7.69 2.26 30.0 -- 
06400875 HORSEHEAD CREEK AT OELRICHS,SD  04/26 16:00 MDT 2.37 0.41 19.0 -- 
06401500 CHEYENNE RIVER BELOW ANGOSTURA DAM,SD  04/26 16:15 MDT 2.90 1.17 61.0 -- 
06402000 FALL RIVER AT HOT SPRINGS,SD  04/26 16:25 MDT 0.96 28.7 25.0 -- 
06402500 BEAVER CREEK NEAR BUFFALO GAP,SD  04/26 16:45 MDT 4.40 11.2 7.20 -- 
06402600 CHEYENNE RIVER NEAR BUFFALO GAP SD  04/26 16:15 MDT 2.49 65.3 108 -- 
06403300 FRENCH CREEK ABOVE FAIRBURN SD  04/26 16:15 MDT 1.11 22.5 17.0 -- 
06403700 CHEYENNE RIVER AT RED SHIRT, SD  04/26 16:45 MDT 9.78 108 277 -- 
06403810 BATTLE CREEK ABOVE KEYSTONE,SD  04/26 16:15 MDT 5.22 --     --- -- 
06403850 GRIZZLY BEAR CREEK NEAR KEYSTONE,SD  04/26 16:40 MDT 2.73 --     --- -- 
06404000 BATTLE CREEK NEAR KEYSTONE,SD  04/26 16:15 MDT 3.77 22.2 14.0 -- 
06404998 GRACE COOLIDGE CREEK NR GAME LODGE NR CUSTER,SD  04/26 16:00 MDT 7.20 9.90 6.50 -- 
06406000 BATTLE CREEK AT HERMOSA,SD  04/26 16:00 MDT 2.94 18.4 15.0 -- 
06406500 BATTLE CREEK BELOW HERMOSA,SD  04/26 16:30 MDT 2.65 23.0 24.0 -- 
06406700 SPRING CREEK AT OREVILLE, NEAR HILL CITY,SD  04/26 16:45 MDT 4.03 --     --- -- 
06406740 SUNDAY GULCH BELOW JOHNSON CANYON NR HILL CITY,SD  04/26 16:45 MDT 4.15 --     --- -- 
06406760 RENO GULCH NEAR HILL CITY,SD  04/26 16:45 MDT 3.69 --     --- -- 
06407500 SPRING CREEK NEAR KEYSTONE,SD  04/26 16:00 MDT 5.00 34.5 31.0 -- 
06408650 CHEYENNE RIVER NEAR SCENIC, SD  04/26 16:15 MDT 6.57 112 280 -- 
06408700 RHOADS FORK NEAR ROCHFORD,SD  04/26 16:15 MDT 3.73 5.93 6.00 -- 
06409000 CASTLE CREEK ABOVE DEERFIELD RES NEAR HILL CITY,SD  04/26 16:00 MDT 2.83 17.4 18.0 -- 
06410000 CASTLE CREEK BELOW DEERFIELD DAM SD  04/26 16:45 MDT 3.56 14.9 19.0 -- 
06410500 RAPID CREEK ABOVE PACTOLA RES AT SILVER CITY, SD  04/26 16:45 MDT 4.93 62.0 83.0 -- 
06411500 RAPID CREEK BELOW PACTOLA DAM,SD  04/26 16:15 MDT 7.47 34.7 73.0 -- 
06411900 RAPID CREEK ABV JOHNSON SIDING BLW PACTOLA DAM,SD  04/26 16:40 MDT 2.99 --     --- -- 
06412000 RAPID CREEK AT BIG BEND NR RAPID CITY,SD  04/26 16:45 MDT 4.18 --     --- -- 
06412200 RAPID CREEK ABV VICTORIA CREEK NR RAPID CITY, SD  04/26 16:45 MDT 5.42 --     --- -- 
06412220 VICTORIA CREEK ABV VICTORIA DAM NR RAPID CITY,SD  04/26 16:45 MDT 3.69 --     --- -- 
06412250 VICTORIA CREEK BLW VICTORIA DAM NR RAPID CITY,SD  04/26 16:45 MDT 3.76 --     --- -- 
06412500 RAPID CREEK ABV CANYON LAKE NEAR RAPID CITY,SD  04/26 16:25 MDT 2.05 35.4 76.0 -- 
06412580 WILD IRISHMAN GULCH NEAR RAPID CITY,SD  04/26 16:45 MDT 3.56 --     --- -- 
06412810 CLEGHORN SPRINGS AT RAPID CITY, SD  04/26 16:30 MDT 2.74 12.6 13.0 -- 
06413620 SOUTH CANYON NEAR RAPID CITY,SD  04/26 16:45 MDT 3.60 --     --- -- 
06414000 RAPID CR AT RAPID CITY,SD  04/26 16:30 MDT 3.85 98.2 98.0 -- 
06416000 RAPID CREEK BLW HAWTHORN DITCH AT RAPID CITY,SD  04/26 16:40 MDT 10.24 --     --- -- 
06418800 RAPID CREEK ABOVE WRF NR RAPID CITY, SD  04/26 16:15 MDT 3.89 88.3 134 -- 
06421500 RAPID CR NEAR FARMINGDALE,SD  04/26 15:45 MDT 7.24 267 132 2,706.98 
06422500 BOXELDER CREEK NEAR NEMO,SD  04/26 16:45 MDT 2.00 29.0 40.0 -- 
06423010 BOXELDER CREEK NEAR RAPID CITY,SD  04/26 16:40 MDT 29.72 --     --- -- 
06423050 BOXELDER CREEK AT I-90 SERVICE RD NR BOX ELDER, SD  04/26 16:00 MDT Ssn --     --- -- 
06423100 BOXELDER CREEK AT 151ST AVE NR BOX ELDER, SD  04/26 16:00 MDT Ssn --     --- -- 
06423500 CHEYENNE RIVER NEAR WASTA, SD  04/26 16:30 MDT 0.99 276 744 -- 
06425100 ELK CREEK NR RAPID CITY,SD  04/26 16:00 MDT 5.34 15.6 24.0 -- 
06425500 ELK CREEK NEAR ELM SPRINGS,SD  04/26 16:00 MDT 4.46 25.8 94.0 -- 
06438500 CHEYENNE RIVER NEAR PLAINVIEW,SD  04/26 16:30 MDT 9.44 1,230 1,070 -- 
06439000 CHERRY CREEK NEAR PLAINVIEW,SD  04/26 16:15 MDT 4.64 61.0 68.0 -- 
06439500 CHEYENNE RIVER NEAR EAGLE BUTTE SD  04/26 16:00 MDT 11.90 --     --- -- 
Group BELLE FOURCHE RIVER BASIN
06428500 BELLE FOURCHE RIVER AT WY-SD STATE LINE  04/26 16:15 MDT 3.88 47.2 166 -- 
06429997 MURRAY DITCH ABV HEADGATE AT WY-SD STATE LINE  04/26 16:00 MDT 0.91 0.00 1.30 -- 
06430500 REDWATER CREEK AT WY-SD STATE LINE  04/26 16:00 MDT 3.86 67.1 46.0 -- 
06430770 SPEARFISH CREEK NR LEAD, SD  04/26 16:30 MDT 7.55 27.4 36.0 -- 
06430800 ANNIE CREEK NEAR LEAD, SD  04/26 16:15 MDT 4.32 --     --- -- 
06430850 LITTLE SPEARFISH CREEK NEAR LEAD, SD  04/26 16:00 MDT 4.50 19.8 19.0 -- 
06431500 SPEARFISH CREEK AT SPEARFISH,SD  04/26 16:00 MDT 5.17 75.7 87.0 -- 
06433000 REDWATER RIVER ABOVE BELLE FOURCHE,SD  04/26 16:45 MDT 3.30 193 222 -- 
06434505 INLET CANAL ABOVE BELLE FOURCHE RESERVOIR,SD  04/26 16:15 MDT 4.17 17.1 196 -- 
06436000 BELLE FOURCHE RIVER NEAR FRUITDALE,SD  04/26 16:15 MDT 3.31 263 220 -- 
06436170  WHITEWOOD CREEK AT DEADWOOD  04/26 16:00 MDT 3.91 Rat 70.0 -- 
06436180 WHITEWOOD CREEK ABOVE WHITEWOOD,SD  04/26 16:50 MDT 0.98 35.8 76.0 -- 
06436190 WHITEWOOD CREEK NEAR WHITEWOOD,SD  04/26 16:15 MDT 5.77 34.7 81.0 -- 
06436198 WHITEWOOD CREEK ABOVE VALE,SD  04/26 16:00 MDT 1.71 15.6 82.0 -- 
06437000 BELLE FOURCHE RIVER NEAR STURGIS,SD  04/26 16:15 MDT 3.67 233 406 -- 
06437020 BEAR BUTTE CREEK NEAR DEADWOOD, SD  04/26 16:45 MDT 4.10 9.70 24.0 -- 
06437200 BEAR BUTTE CREEK NEAR GALENA,SD  04/26 16:15 MDT 3.22 --     --- -- 
06437300 BEAR BUTTE CREEK AT AVALANCHE ROAD AT STURGIS, SD  04/26 16:55 MDT 1.75 --     --- -- 
06437330 VANOCKER CREEK NEAR STURGIS, SD  04/26 16:50 MDT 0.34 --     --- -- 
06437360 DEADMAN GULCH AT STURGIS, SD  04/26 16:55 MDT 0.86 --     --- -- 
06438000  BELLE FOURCHE RIVER NEAR ELM SPRINGS,SD  04/26 16:00 MDT 5.07 372 543 -- 
Group MISSOURI-FORT RANDALL RIVER BASIN
06440000 MISSOURI RIVER AT PIERRE,SD  04/26 17:15 CDT 7.52 --     --- -- 
06440200 SOUTH FORK BAD RIVER NEAR COTTONWOOD,SD  04/26 16:45 MDT 4.53 0.00 29.0 -- 
06441000 BAD RIVER NEAR MIDLAND,SD  04/26 16:15 MDT 3.71 --     --- -- 
06441500 BAD RIVER NEAR FORT PIERRE,SD  04/26 16:30 MDT 6.31 1,510 303 -- 
06441590 MISSOURI RIVER AT LAFRAMBOISE ISLAND AT PIERRE, SD  04/26 17:15 CDT 21.54 --     --- -- 
06441592 MISSOURI R BL LA FRAMBOISE ISLAND, AT PIERRE,SD  04/26 17:15 CDT 21.17 --     --- -- 
06441595 MISSOURI RIVER AT FARM ISLAND NR PIERRE, SD  04/26 17:15 CDT 20.88 --     --- -- 
06442130 CEDAR CREEK NEAR PRESHO, SD  04/26 17:15 CDT 8.19 68.8 2.40 -- 
06442600 MEDICINE CREEK NEAR LOWER BRULE, SD  04/26 17:15 CDT 9.54 22.3 60.0 -- 
06442900 ELM CREEK NEAR GANN VALLEY SD  04/26 17:45 CDT 3.45 20.1 39.0 -- 
06442996 LAKE FRANCIS CASE AT CHAMBERLAIN, SD  04/26 17:30 CDT 57.08 --     --- -- 
06452320 PLATTE CREEK NEAR PLATTE, SD  04/26 17:15 CDT 2.22 9.61 77.0 -- 
Group WHITE RIVER BASIN
06445685 WHITE RIVER NEAR NE-SD STATE LINE  04/26 16:45 MDT 4.53 62.5 83.0 -- 
06446000 WHITE RIVER NEAR OGLALA SD  04/26 16:00 MDT -- 84.4 99.0 -- 
06446500 WHITE RIVER NEAR INTERIOR,SD  04/26 16:30 MDT 4.76 336 344 -- 
06446700 BEAR IN THE LODGE CREEK NEAR WANBLEE,SD  04/26 16:15 MDT 2.49 42.3 31.0 -- 
06447000 WHITE RIVER NEAR KADOKA,SD  04/26 16:45 MDT 6.61 1,390 475 -- 
06447230 BLACK PIPE CREEK NEAR BELVIDERE, SD  04/26 17:00 CDT 4.91 414 43.0 -- 
06447450 WHITE RIVER NEAR WHITE RIVER, SD  04/26 17:00 CDT 4.69 388 658 -- 
06447500 LITTLE WHITE RIVER NEAR MARTIN,SD  04/26 16:00 MDT 1.74 32.9 38.0 -- 
06449000 LAKE CREEK BELOW REFUGE NEAR TUTHILL,SD  04/26 16:00 MDT 3.80 54.1 39.0 -- 
06449100 LITTLE WHITE RIVER NEAR VETAL,SD  04/26 16:00 MDT 3.99 119 102 -- 
06449500 LITTLE WHITE RIVER NEAR ROSEBUD SD  04/26 17:15 CDT 4.72 245 181 -- 
06450500 LITTLE WHITE RIVER BELOW WHITE RIVER,SD  04/26 17:00 CDT 4.68 1,540 233 -- 
06452000 WHITE RIVER NEAR OACOMA,SD  04/26 17:15 CDT 8.93 596 1,350 -- 
Group MISSOURI-LEWIS AND CLARK RIVER BASIN
06453020 MISSOURI RIVER BELOW GREENWOOD, SD  04/26 17:30 CDT 25.97 --     --- 1,226.97 
06466700 LEWIS AND CLARK LAKE AT SPRINGFIELD,SD  04/26 17:30 CDT 8.57 --     --- -- 
06467500 MISSOURI RIVER AT YANKTON, SD  04/26 17:45 CDT 11.07 --     --- -- 
06478523 MISSOURI RIVER NEAR ST. JAMES, NE  04/26 17:30 CDT 33.28 --     --- -- 
06478600 EAST FORK VERMILLION RIVER NEAR PARKER, SD  04/26 17:15 CDT 5.18 20.9 275 -- 
06478690 WEST FORK VERMILLION RIVER NEAR PARKER,SD  04/26 17:15 CDT 3.02 157 90.0 -- 
06479010 VERMILLION RIVER NEAR VERMILLION,SD  04/26 17:30 CDT 4.77 313 967 -- 
Group NIOBRARA RIVER BASIN
06464100 KEYA PAHA RIVER NEAR KEYAPAHA,SD  04/26 17:15 CDT 5.02 66.7 90.0 -- 
06464500 KEYA PAHA RIVER AT WEWELA,SD  04/26 17:15 CDT 2.89 169 162 -- 
Group JAMES RIVER BASIN
06470000 JAMES RIVER AT JAMESTOWN, ND  04/26 17:15 CDT 3.73 88.7 339 1,378.19 
06470500 JAMES RIVER AT LAMOURE, ND  04/26 17:15 CDT 7.84 187 512 1,298.91 
06470878 JAMES RIVER AT ND-SD STATE LINE  04/26 16:45 CDT 88.52 315 974 1,289.40 
06471000 JAMES RIVER AT COLUMBIA,SD  04/26 17:00 CDT 7.67 284 1,030 1,280.84 
06471065 ELM RIVER NEAR FREDERICK,SD  04/26 17:30 CDT 5.84 --     --- 1,422.74 
06471200 MAPLE RIVER AT ND-SD STATE LINE  04/26 17:45 CDT 2.32 47.6 98.0 1,367.21 
06471500 ELM RIVER AT WESTPORT,SD  04/26 17:00 CDT 5.01 51.6 177 1,315.05 
06471510 ELM RIVER NEAR ORDWAY,SD  04/26 17:45 CDT 4.40 --     --- 1,297.67 
06471770 MOCCASIN CREEK AT ABERDEEN, SD  04/26 16:45 CDT 2.38 --     --- 1,289.03 
06471800 FOOT CREEK NEAR ABERDEEN, SD  04/26 17:45 CDT 4.23 1.10 19.0 1,323.36 
06471875 MOCCASIN CREEK NEAR ABERDEEN, SD  04/26 17:45 CDT 13.55 --     --- -- 
06472000 JAMES RIVER NEAR STRATFORD,SD  04/26 17:45 CDT 9.30 347 1,220 1,264.44 
06473000 JAMES RIVER AT ASHTON,SD  04/26 17:45 CDT 6.22 456 1,190 -- 
06475000 JAMES RIVER NEAR REDFIELD,SD  04/26 17:45 CDT 6.82 757 1,450 -- 
06476000 JAMES RIVER AT HURON,SD  04/26 17:00 CDT 10.08 980 1,750 1,234.21 
06477000 JAMES RIVER NEAR FORESTBURG,SD  04/26 17:15 CDT 7.23 779 2,120 -- 
06477500 FIRESTEEL CREEK NEAR MOUNT VERNON,SD  04/26 17:15 CDT 2.96 20.6 73.0 -- 
06478000 JAMES RIVER NEAR MITCHELL,SD  04/26 16:45 CDT 12.79 823 2,980 -- 
06478500 JAMES RIVER NEAR SCOTLAND,SD  04/26 17:30 CDT 5.63 828 2,170 -- 
06478513 JAMES RIVER NEAR YANKTON, SD  04/26 17:00 CDT 4.08 842 4,060 -- 
Group BIG SIOUX RIVER BASIN
06479215 BIG SIOUX RIVER NEAR FLORENCE,SD  04/26 17:00 CDT 3.89 32.1 35.0 1,785.43 
06479438 BIG SIOUX RIVER NEAR WATERTOWN,SD  04/26 17:00 CDT 4.76 69.0 104 1,731.42 
06479449 LAKE KAMPESKA AT WATER PLANT AT WATERTOWN, SD  04/26 17:15 CDT 18.19 --     --- -- 
06479452 BIG SIOUX RIVER AT LAKE KAMPESKA NR WATERTOWN, SD  04/26 17:15 CDT 18.32 --     --- 1,719.14 
06479490 MUD CREEK NEAR RAUVILLE, SD  04/26 17:00 CDT 7.84 --     --- 1,765.80 
06479498 SOUTH BRANCH TRIB MUD CREEK NR RAUVILLE, SD  04/26 17:00 CDT 2.36 --     --- 1,738.77 
06479500 BIG SIOUX RIVER AT WATERTOWN,SD  04/26 17:15 CDT 4.84 103 157 1,716.25 
06479512 BIG SIOUX RIVER AT BROADWAY AT WATERTOWN, SD  04/26 17:00 CDT 6.36 --     --- 1,708.74 
06479515 WILLOW CREEK NEAR WATERTOWN,SD  04/26 17:00 CDT 5.88 --     --- 1,738.28 
06479520 BIG SIOUX RIVER BELOW WATERTOWN, SD  04/26 17:45 CDT 5.66 --     --- 1,701.16 
06479525 BIG SIOUX RIVER NEAR CASTLEWOOD,SD  04/26 17:45 CDT 6.00 176 341 1,674.48 
06479770 BIG SIOUX RIVER NEAR BRUCE, SD  04/26 17:45 CDT 4.05 230 866 1,616.01 
06480000 BIG SIOUX RIVER NEAR BROOKINGS,SD  04/26 17:00 CDT 23.43 --     --- 1,576.23 
    04/26 16:45 CDT -- 391 945 -- 
06480650 FLANDREAU CREEK ABOVE FLANDREAU SD  04/26 17:45 CDT 4.97 Bkw 61.0 1,566.71 
06481000 BIG SIOUX RIVER NEAR DELL RAPIDS,SD  04/26 17:30 CDT 4.50 446 1,250 1,461.44 
06481400 BIG SIOUX RIVER BELOW DIVERSION AT SIOUX FALLS, SD  04/26 17:30 CDT 2.58 --     --- 1,407.06 
06481480 SKUNK CREEK NEAR CHESTER,SD  04/26 17:00 CDT 0.92 0.71 139 1,560.71 
06481493 SKUNK CREEK NEAR HARTFORD, SD  04/26 17:15 CDT 4.12 --     --- 1,475.95 
06481497 WILLOW CREEK NEAR CROOKS, SD  04/26 17:15 CDT 4.25 --     --- 1,479.78 
06481500 SKUNK CREEK AT SIOUX FALLS,SD  04/26 17:30 CDT 3.11 51.1 234 1,403.99 
06482000 BIG SIOUX RIVER AT SIOUX FALLS SD  04/26 17:00 CDT 1.77 138 630 1,395.35 
06482010 SILVER CREEK AT SIOUX FALLS, SD  04/26 17:15 CDT 1.44 --     --- 1,422.53 
06482020 BIG SIOUX R AT NORTH CLIFF AVE AT SIOUX FALLS,SD  04/26 17:30 CDT 7.06 683 1,960 1,302.15 
06482610 SPLIT ROCK CREEK AT CORSON,SD  04/26 16:45 CDT 2.38 108 203 1,307.47 
06483500 Rock River near Rock Valley, IA  04/26 17:00 CDT 5.83 587 954 -- 
06483950 BIG SIOUX RIVER NEAR HAWARDEN, IA  04/26 17:30 CDT 13.27 1,520 5,550 1,163.27 
06485500 BIG SIOUX RIVER AT AKRON,IA  04/26 17:00 CDT 7.49 1,600 3,110 1,127.02 
06485910 BIG SIOUX RIVER NEAR JEFFERSON, SD  04/26 17:30 CDT 11.73 2,250 5,910 1,081.73 
06485950 BIG SIOUX RIVER AT SIOUX CITY, IA  04/26 17:30 CDT 12.54 2,870 6,320 1,072.54 
06486000 Missouri River at Sioux City, IA  04/26 17:00 CDT 12.92 33,200 33,300 -- 
Group RED RIVER OF THE NORTH BASIN
05049995 MUD LAKE ABOVE WHITE ROCK DAM NEAR WHITE ROCK, SD  04/26 17:30 CDT 72.18 --     --- -- 
05050000 BOIS DE SIOUX RIVER NEAR WHITE ROCK, SD  04/26 17:30 CDT 7.12 498 524 967.55 

Data status codes:
  --     Parameter not determined
  Bkw     Flow affected by backwater
  Rat     Rating being developed or revised
  Ssn     Parameter monitored seasonally