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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 06479525 BIG SIOUX RIVER NEAR CASTLEWOOD,SD


Hamlin County, South Dakota
Hydrologic Unit Code 10170201
Latitude  44°43'53.7", Longitude  97°02'39.5" NAD27
Drainage area 1,096  square miles
Contributing drainage area 579  square miles
Gage datum 1,668.48 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1976-10-01 -> 2024-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 24 20 46 369 300 189 100 72 47 55 70 45
2 24 19 46 375 289 176 105 69 54 58 70 44
3 23 19 43 358 274 157 103 73 55 56 67 42
4 22 19 43 344 264 146 103 77 53 55 67 40
5 22 19 43 354 257 149 106 76 52 55 65 38
6 22 19 46 368 258 156 118 77 50 54 62 36
7 21 19 48 385 257 152 125 75 48 53 59 36
8 21 20 53 418 258 153 122 74 49 51 58 36
9 21 20 55 414 272 148 117 78 53 51 56 37
10 21 20 61 414 277 142 110 95 52 57 56 37
11 21 21 73 417 264 146 106 97 51 62 54 35
12 21 22 90 431 252 148 105 85 54 56 54 35
13 21 25 130 432 247 148 100 78 62 55 54 35
14 21 24 143 417 244 139 95 74 62 54 53 35
15 21 25 168 411 236 141 97 72 57 57 53 34
16 21 24 192 400 227 162 90 70 68 56 52 33
17 21 29 215 388 219 183 87 66 64 59 51 32
18 20 35 232 379 212 161 88 71 56 60 50 32
19 19 41 244 393 211 149 90 77 53 61 48 30
20 19 44 243 394 205 142 85 70 53 59 48 30
21 20 42 221 382 195 145 83 74 54 60 46 29
22 20 40 227 386 189 161 79 71 52 61 47 28
23 20 49 261 388 187 171 79 62 53 61 47 28
24 20 60 276 379 184 156 78 58 61 60 46 27
25 20 60 288 360 177 138 84 56 58 58 44 27
26 20 55 292 341 170 127 88 54 54 59 43 27
27 20 53 331 329 164 119 83 54 51 61 45 26
28 20 50 356 322 167 112 80 58 50 66 46 27
29 20 74 350 315 167 105 79 55 48 74 47 26
30 20   350 305 162 100 75 51 49 71 47 26
31 20   357   176   75 51   70   25