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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 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 44 - 46 years of record in, ft3/s   (Calculation Period 1971-10-01 -> 2018-09-30)

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 61 79 82 168 310 536 191 82 48 59 76 67
2 58 68 88 165 314 527 182 80 48 59 77 77
3 58 62 90 156 323 537 171 76 47 61 78 82
4 60 62 94 152 339 538 185 73 47 62 78 80
5 72 63 96 160 346 528 173 71 47 64 77 72
6 66 62 91 193 351 531 163 69 47 65 77 66
7 61 62 93 207 364 515 154 67 47 66 77 63
8 62 70 107 194 364 503 148 69 48 68 79 63
9 62 116 110 196 367 481 142 64 49 68 78 66
10 61 81 129 197 390 458 149 60 50 69 75 65
11 61 73 122 206 417 451 145 59 50 70 74 65
12 61 71 114 217 420 434 139 58 54 72 75 65
13 61 73 119 220 422 432 140 57 54 73 75 65
14 61 75 126 221 437 410 140 57 52 75 73 65
15 76 79 124 221 464 394 136 55 52 76 72 65
16 82 88 132 217 485 388 131 55 53 77 72 65
17 71 100 136 227 508 396 129 55 53 77 73 63
18 66 95 139 236 531 380 125 53 55 78 73 62
19 65 104 137 239 543 387 119 50 56 78 71 60
20 63 104 133 248 535 381 115 51 57 79 71 59
21 61 109 138 257 544 362 111 51 57 79 70 59
22 61 95 146 274 641 328 107 53 57 79 69 59
23 60 84 158 298 608 309 102 53 58 78 67 59
24 59 86 153 311 620 287 100 55 58 78 67 59
25 59 94 142 317 644 265 96 52 57 78 68 67
26 60 95 144 313 621 252 92 50 57 78 68 73
27 62 82 146 308 594 241 95 49 58 78 67 62
28 62 81 140 308 571 222 91 48 57 77 68 60
29 63 75 135 303 561 206 88 48 57 77 68 59
30 62   137 305 558 195 85 48 59 76 67 59
31 67   157   550   86 47   76   60