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USGS Surface-Water 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 12324590 Little Blackfoot River near Garrison MT


Powell County, Montana
Hydrologic Unit Code 17010201
Latitude  46°31'10.14", Longitude 112°47'35.42" NAD83
Drainage area 414  square miles
Gage datum 4,343.97 feet above NGVD29
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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 1971-10-01 -> 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 63 76 85 167 352 546 202 83 46 61 79 70
2 61 68 88 167 355 530 192 81 47 61 79 79
3 61 62 89 160 362 535 180 77 46 63 81 83
4 62 61 92 160 380 534 192 74 45 64 81 81
5 73 62 94 172 391 522 181 72 46 66 81 73
6 68 61 90 196 399 524 170 71 46 67 81 68
7 64 62 94 208 419 510 161 69 46 67 81 65
8 65 70 107 206 417 501 156 69 48 69 83 65
9 64 109 108 213 416 484 151 64 50 69 80 67
10 63 78 124 218 438 456 157 61 50 70 78 67
11 63 71 117 226 461 449 152 60 50 72 77 67
12 61 70 112 229 456 434 145 59 53 73 78 67
13 60 73 116 224 451 428 145 58 53 74 78 67
14 60 75 121 224 462 404 145 57 52 76 76 66
15 73 79 119 226 485 387 140 56 52 77 75 67
16 78 87 128 224 508 380 135 54 52 78 76 66
17 69 98 133 233 530 390 133 54 53 78 76 65
18 66 93 137 240 554 380 128 53 55 79 76 64
19 65 100 137 246 561 401 122 50 56 79 76 62
20 63 101 135 261 559 398 119 51 57 81 75 62
21 61 105 138 274 570 376 115 51 57 81 74 62
22 61 93 144 293 652 341 110 53 58 80 73 62
23 60 84 154 311 617 318 106 54 59 80 72 60
24 59 86 150 320 623 298 103 55 58 79 74 60
25 59 94 140 330 641 274 98 52 57 79 73 67
26 61 97 143 328 623 259 94 50 57 79 73 72
27 62 84 145 327 602 247 95 50 58 79 72 63
28 61 83 143 332 578 229 92 48 58 78 72 62
29 61 82 141 338 566 217 89 48 58 78 71 61
30 60   139 346 560 210 86 47 60 78 69 60
31 65   157   554   86 46   79   62