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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 4,347.73 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 1971-10-01 -> 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 62 76 85 166 348 541 200 82 46 60 78 70
2 61 68 89 166 351 525 190 80 46 61 79 78
3 61 62 89 159 358 530 178 76 45 62 81 83
4 62 61 92 159 375 529 190 73 45 64 81 80
5 73 61 94 171 386 517 179 71 45 65 81 73
6 68 61 90 196 394 518 168 70 45 66 81 67
7 64 62 94 207 413 503 159 68 45 67 80 64
8 64 69 107 205 412 495 155 68 47 68 82 64
9 64 107 108 212 411 478 149 63 50 69 80 67
10 62 78 124 217 432 452 155 60 49 69 78 67
11 63 71 117 226 455 444 150 59 50 71 77 67
12 61 70 112 229 451 429 144 58 53 73 77 66
13 60 72 116 223 446 423 144 57 53 74 78 67
14 60 75 120 223 457 400 143 56 51 76 76 66
15 72 79 119 225 480 383 139 55 51 77 75 67
16 78 87 128 223 501 376 134 53 52 77 76 66
17 69 97 132 232 524 386 131 53 52 77 76 65
18 65 93 137 239 547 376 127 52 54 78 76 64
19 64 99 137 245 554 396 120 50 56 79 76 62
20 62 100 135 260 552 393 117 50 56 80 75 62
21 60 104 137 273 563 371 113 51 57 80 74 62
22 60 93 143 292 643 336 109 52 57 80 73 62
23 59 85 153 310 610 314 104 53 58 79 72 60
24 59 87 150 319 616 294 101 54 58 78 74 60
25 59 94 140 329 634 270 96 51 57 78 73 67
26 60 96 142 328 616 255 92 50 57 79 73 71
27 61 84 145 326 595 244 93 49 58 78 72 63
28 61 83 142 332 572 226 90 47 57 78 71 62
29 61 82 140 338 560 214 88 47 58 78 71 61
30 60   138 346 555 207 84 47 59 77 69 60
31 65   156   549   85 46   78   61