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USGS Surface-Water 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 12342500 West Fork Bitterroot River nr Conner MT


Ravalli County, Montana
Hydrologic Unit Code 17010205
Latitude  45°43'29.38", Longitude 114°16'56.26" NAD83
Drainage area 317  square miles
Gage datum 4,581.4 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 1940-10-01 -> 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 82 77 84 124 328 1,190 447 218 230 140 122 89
2 82 77 87 130 359 1,160 425 218 228 141 123 89
3 82 77 89 133 402 1,180 407 219 226 140 120 87
4 84 77 89 136 438 1,180 387 221 222 137 121 86
5 84 76 89 137 454 1,170 368 222 222 135 120 85
6 81 76 88 139 462 1,170 348 225 224 136 118 85
7 82 76 88 142 486 1,150 329 223 222 136 115 85
8 82 77 88 143 525 1,120 309 222 219 137 112 86
9 83 77 89 151 552 1,090 298 224 217 141 109 88
10 83 77 89 155 624 1,030 287 227 212 139 106 89
11 83 77 86 166 678 993 275 230 203 137 104 89
12 83 77 84 169 699 979 265 236 199 138 100 88
13 83 78 85 173 713 966 255 238 199 144 97 88
14 83 78 85 180 756 933 244 239 195 145 95 88
15 83 77 86 191 800 899 234 238 193 144 94 89
16 83 78 87 197 867 875 228 237 191 146 95 91
17 81 78 89 200 918 854 224 238 189 142 96 89
18 79 77 89 203 976 819 218 238 185 138 97 86
19 78 77 90 211 1,040 795 211 238 180 133 98 84
20 77 77 90 224 1,100 770 206 238 176 127 96 83
21 77 77 90 239 1,110 737 202 237 171 128 96 84
22 77 78 94 248 1,100 707 201 239 167 132 96 86
23 77 78 97 260 1,110 674 201 242 162 135 96 85
24 77 78 98 274 1,130 643 200 237 160 135 95 85
25 77 79 101 291 1,150 612 199 234 158 132 95 84
26 77 82 104 297 1,190 576 197 234 153 128 93 84
27 77 83 107 303 1,220 546 203 233 150 128 92 83
28 77 84 109 308 1,240 518 208 231 149 126 89 84
29 77 85 112 309 1,250 495 208 230 146 124 88 84
30 77   114 313 1,250 471 213 230 143 122 88 84
31 77   117   1,230   217 229   121   83