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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 4,250 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
1 136 139 129 222 552 1,270 673 245 170 166 170 152
2 135 139 132 225 577 1,270 637 240 170 167 171 153
3 134 133 132 224 610 1,270 605 236 168 166 170 153
4 136 129 131 221 647 1,270 582 229 166 166 170 153
5 135 130 132 221 668 1,260 560 227 166 166 170 151
6 133 128 132 226 698 1,240 540 228 167 167 171 148
7 137 127 136 232 740 1,240 520 224 166 166 168 148
8 137 132 133 235 766 1,220 504 220 166 165 168 150
9 136 132 135 241 773 1,220 485 217 167 166 166 150
10 135 132 139 248 780 1,190 464 213 167 165 166 151
11 135 130 143 252 808 1,150 447 209 166 165 163 151
12 135 130 146 256 835 1,100 440 204 166 166 162 151
13 131 130 152 264 845 1,060 426 201 166 167 167 150
14 131 130 154 281 869 1,040 417 198 165 167 171 146
15 130 130 157 293 907 1,020 405 194 164 167 169 146
16 134 133 166 294 938 1,000 392 190 164 168 169 146
17 135 132 174 294 990 991 377 187 165 169 168 144
18 138 132 174 297 1,050 986 364 186 164 168 167 143
19 142 129 174 303 1,090 959 351 185 166 167 166 143
20 150 130 173 308 1,130 921 340 183 167 169 164 144
21 147 129 174 332 1,170 891 328 184 168 170 165 145
22 143 126 177 363 1,210 856 317 185 168 170 163 145
23 141 128 183 404 1,200 838 308 185 168 170 162 144
24 140 127 184 448 1,190 834 298 183 168 171 161 146
25 142 128 184 478 1,220 813 289 181 166 171 160 144
26 137 127 186 506 1,260 781 280 179 165 170 161 142
27 136 128 190 524 1,310 743 274 177 164 170 161 140
28 137 129 194 535 1,350 716 269 174 163 169 158 140
29 134 135 197 530 1,340 694 263 172 163 170 155 141
30 131   201 531 1,310 691 255 170 163 169 153 140
31 133   207   1,290   249 169   168   139