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USGS Daily Statistics for South Dakota

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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 05291000 WHETSTONE RIVER NEAR BIG STONE CITY, SD


Grant County, South Dakota
Hydrologic Unit Code 07020001
Latitude  45°17'30", Longitude  96°29'14" NAD27
Drainage area 398  square miles
Gage datum 995.12 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 1909-10-01 -> 2025-09-30)

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 14 10 39 295 157 133 69 37 19 15 38 21
2 13 12 33 267 147 155 73 39 19 20 32 20
3 13 13 34 264 137 132 58 55 19 31 28 19
4 13 12 42 280 121 96 70 40 19 28 27 18
5 12 11 58 285 106 82 101 31 17 25 25 17
6 12 11 61 325 101 74 105 30 16 26 24 17
7 12 11 63 356 110 99 109 28 14 25 23 16
8 12 11 68 415 117 111 106 28 13 24 23 15
9 12 11 73 318 118 88 83 27 13 24 22 15
10 12 11 71 259 140 78 69 30 14 29 22 15
11 11 12 75 284 115 98 60 35 16 26 21 15
12 11 12 97 403 99 154 55 29 17 23 21 15
13 11 12 155 364 106 118 45 34 27 21 21 15
14 10 13 221 254 139 112 41 60 23 20 21 14
15 10 13 198 260 130 128 45 35 17 21 20 14
16 10 13 233 239 101 124 41 26 15 23 20 14
17 10 16 213 207 103 110 44 24 14 28 21 14
18 10 16 220 205 109 99 73 26 14 26 23 14
19 10 15 217 243 109 101 71 27 13 25 22 14
20 11 16 193 207 98 125 75 25 14 23 22 13
21 11 19 200 188 112 108 53 24 17 23 22 13
22 11 21 262 176 107 113 50 21 16 33 20 13
23 11 29 315 173 129 126 40 18 15 41 20 13
24 11 33 324 160 117 98 36 17 31 31 20 13
25 11 34 304 153 115 80 47 16 42 27 20 13
26 10 34 268 140 108 66 60 16 24 29 20 14
27 10 36 275 138 86 60 59 18 22 34 20 19
28 10 37 314 132 83 55 69 19 18 33 20 19
29 10 58 321 135 88 58 58 20 16 35 22 17
30 9.9   314 155 88 66 45 21 15 32 22 15
31 10   339   135   36 18   37   14