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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 06471500 ELM RIVER AT WESTPORT,SD


Brown County, South Dakota
Hydrologic Unit Code 10160004
Latitude  45°39'22", Longitude  98°29'48" NAD27
Drainage area 1,505  square miles
Contributing drainage area 1,210  square miles
Gage datum 1,310.04 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 1945-10-01 -> 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 4.6 3.8 25 357 140 70 89 37 18 9 18 13
2 4.5 3.9 28 377 150 60 88 33 16 8.9 17 13
3 4.3 3.9 35 405 153 55 91 32 16 8.7 17 13
4 4.2 4 41 408 156 52 90 39 16 8.3 16 12
5 4.1 4 33 430 160 51 80 34 14 8.6 15 11
6 4.1 4 31 430 153 52 77 32 14 9.4 15 10
7 4.2 4 30 395 136 52 84 29 14 9.7 13 9.6
8 6.6 4.1 27 409 133 52 102 27 13 9.8 13 9
9 6.1 4.2 30 474 147 53 112 25 15 11 12 8.6
10 4.8 4.4 42 520 175 79 116 26 15 12 11 8.2
11 4.6 4.9 49 479 191 98 119 25 14 12 11 7.9
12 4.5 4.9 58 474 187 92 106 24 14 12 10 7.7
13 4.4 4.8 72 420 185 84 92 29 14 12 11 7.4
14 4.3 5.1 105 369 179 88 92 34 15 12 11 7.1
15 4 5.3 201 339 157 87 92 34 14 12 11 6.9
16 3.8 6 259 328 136 82 85 33 14 11 10 6.6
17 3.8 7.6 333 316 119 83 76 29 13 12 9.8 6.3
18 3.9 10 315 307 109 84 65 28 14 14 9.8 6.2
19 3.8 21 323 312 103 81 56 26 14 14 9.5 6
20 3.8 33 323 299 100 91 50 25 14 14 9.6 5.9
21 3.8 31 312 294 98 117 52 22 13 18 9.5 5.6
22 3.8 36 321 280 88 164 53 21 12 21 9.1 5.5
23 3.8 38 336 265 88 192 49 19 11 22 8.8 5.4
24 3.9 32 371 230 93 192 43 18 11 23 9.2 5.3
25 3.9 31 403 200 88 171 39 18 10 24 9.6 5.3
26 3.9 29 389 177 86 146 93 18 9.6 27 9.7 5.2
27 3.9 27 402 162 90 128 113 20 9 29 10 5.1
28 3.8 30 449 153 83 111 81 21 8.7 26 11 5
29 3.8 32 447 146 81 111 64 23 8.4 22 12 4.9
30 3.7   429 145 75 106 52 22 8.6 21 13 4.8
31 3.7   384   74   43 20   20   4.6