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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 -> 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
1 136 139 129 222 569 1,300 689 250 172 168 170 152
2 135 139 132 225 595 1,300 653 245 172 169 171 153
3 134 133 132 224 630 1,300 620 240 169 168 170 153
4 136 129 131 221 669 1,300 596 233 167 167 170 153
5 135 130 132 221 691 1,280 574 230 168 167 170 151
6 133 128 132 226 722 1,270 553 232 169 168 171 148
7 137 127 136 232 766 1,270 532 228 168 167 168 148
8 137 132 133 239 793 1,250 516 224 167 167 168 150
9 136 132 135 246 799 1,250 497 220 169 167 166 150
10 135 132 139 253 807 1,210 475 216 169 167 166 151
11 135 130 143 256 837 1,170 458 212 167 167 163 151
12 135 130 146 261 864 1,120 450 207 167 168 162 151
13 131 130 152 269 872 1,080 436 204 167 168 167 150
14 131 130 154 287 893 1,070 427 201 166 168 171 146
15 130 130 157 299 928 1,040 415 196 165 169 169 146
16 134 133 166 300 958 1,030 402 192 165 169 169 146
17 135 132 174 300 1,010 1,010 386 189 167 171 168 144
18 138 132 174 303 1,070 1,010 373 188 166 169 167 143
19 142 129 174 309 1,110 980 359 187 167 168 166 143
20 150 130 173 315 1,160 943 348 185 169 170 164 144
21 147 129 174 340 1,200 912 336 186 169 171 165 145
22 143 126 177 372 1,240 877 324 187 169 171 163 145
23 141 128 183 415 1,230 859 315 187 170 171 162 144
24 140 127 184 461 1,220 856 305 186 169 171 161 146
25 142 128 184 493 1,250 834 295 183 168 171 160 144
26 137 127 186 521 1,300 802 286 181 167 170 161 142
27 136 128 190 540 1,340 762 280 179 166 170 161 140
28 137 129 194 552 1,380 733 275 176 164 169 158 140
29 134 135 197 546 1,370 711 268 174 164 170 155 141
30 131   201 547 1,340 708 260 172 165 169 153 140
31 133   207   1,320   254 171   168   139