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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


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 85 167 348 541 200 83 46 61 79 70
2 61 68 88 167 351 525 190 81 47 61 79 79
3 61 62 89 160 358 530 178 77 46 63 81 83
4 62 61 92 160 375 529 190 74 45 64 81 81
5 73 62 94 172 386 517 179 72 46 66 81 73
6 68 61 90 196 394 519 168 71 46 67 81 68
7 64 62 94 208 413 504 159 69 46 67 81 65
8 65 70 107 206 412 495 155 69 48 69 83 65
9 64 109 108 213 411 478 149 64 50 69 80 67
10 63 78 124 218 433 452 155 61 50 70 78 67
11 63 71 117 226 455 444 150 60 50 72 77 67
12 61 70 112 229 451 429 144 59 53 73 78 67
13 60 73 116 224 446 423 144 58 53 74 78 67
14 60 75 121 224 457 400 143 57 52 76 76 66
15 73 79 119 226 480 383 139 56 52 77 75 67
16 78 87 128 224 502 376 134 54 52 78 76 66
17 69 98 133 233 524 386 131 54 53 78 76 65
18 66 93 137 240 547 376 127 53 55 79 76 64
19 65 100 137 246 555 396 120 50 56 79 76 62
20 63 101 135 261 552 393 117 51 57 81 75 62
21 61 105 138 274 563 371 113 51 57 81 74 62
22 61 93 144 293 643 337 109 53 58 80 73 62
23 60 84 154 311 610 314 104 54 59 80 72 60
24 59 86 150 320 616 294 101 55 58 79 74 60
25 59 94 140 330 634 270 96 52 57 79 73 67
26 61 97 143 328 616 255 92 50 57 79 73 72
27 62 84 145 327 595 244 93 50 58 79 72 63
28 61 83 143 332 572 226 90 48 58 78 72 62
29 61 82 141 338 560 214 88 48 58 78 71 61
30 60   139 346 555 207 84 47 60 78 69 60
31 65   157   549   85 46   79   62