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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 12335100 Blackfoot R ab Nevada Cr nr Helmville MT


Powell County, Montana
Hydrologic Unit Code 17010203
Latitude  46°55'07.66", Longitude 113°00'53.95" NAD83
Drainage area 498  square miles
Gage datum 4,255.36 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 1999-10-01 -> 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
1 135 139 129 222 552 1,270 673 245 170 166 168 151
2 134 139 132 225 577 1,270 637 240 170 167 169 152
3 134 133 132 224 610 1,270 605 236 168 166 169 152
4 135 128 131 221 647 1,270 582 229 166 166 168 151
5 134 129 132 221 668 1,260 560 227 166 166 169 150
6 133 128 132 226 698 1,240 540 228 167 167 169 146
7 136 126 136 232 740 1,240 520 224 166 166 166 147
8 136 131 133 235 766 1,220 504 220 166 165 166 149
9 135 131 135 241 773 1,220 485 217 167 166 165 149
10 135 130 139 248 780 1,190 464 213 167 165 165 150
11 134 128 143 252 808 1,150 447 209 166 165 162 150
12 134 127 146 256 835 1,100 440 204 166 166 161 149
13 131 128 152 264 845 1,060 426 201 166 167 166 149
14 131 128 154 281 869 1,040 417 198 165 167 169 145
15 130 128 157 293 907 1,020 405 194 164 167 168 145
16 133 131 166 294 938 1,000 392 190 164 168 167 145
17 134 130 174 294 990 991 377 187 165 169 166 143
18 136 130 174 297 1,050 986 364 186 164 168 166 142
19 140 127 174 303 1,090 959 351 185 166 167 164 142
20 148 128 173 308 1,130 921 340 183 167 169 163 143
21 145 128 174 332 1,170 891 328 184 168 170 164 144
22 142 125 177 363 1,210 856 317 185 168 170 162 144
23 140 127 183 404 1,200 838 308 185 168 170 161 143
24 139 126 184 448 1,190 834 298 183 168 170 160 145
25 141 128 184 478 1,220 813 289 181 166 169 159 143
26 136 127 186 506 1,260 781 280 179 165 168 160 141
27 135 128 190 524 1,310 743 274 177 164 168 160 139
28 136 129 194 535 1,350 716 269 174 163 168 156 139
29 133 135 197 530 1,340 694 263 172 163 169 154 140
30 131   201 531 1,310 691 255 170 163 167 152 139
31 133   207   1,290   249 169   166   138