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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 -> 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 83 78 85 125 328 1,200 450 218 229 140 123 90
2 83 78 88 131 361 1,170 427 218 227 141 124 89
3 83 77 89 133 404 1,180 409 219 226 141 122 88
4 84 77 89 137 440 1,190 389 220 221 139 123 87
5 85 77 89 138 455 1,180 370 221 221 136 121 86
6 82 77 89 140 462 1,170 350 224 222 137 119 86
7 82 77 89 143 486 1,150 331 223 220 138 116 86
8 83 77 89 144 525 1,120 311 221 217 139 113 86
9 84 77 89 152 552 1,090 300 223 215 143 110 88
10 83 77 89 156 625 1,040 289 226 210 141 107 90
11 84 77 86 167 680 994 277 229 202 139 105 90
12 84 78 85 171 699 981 267 236 197 140 101 89
13 84 78 85 174 710 969 256 238 197 146 98 89
14 84 78 85 181 751 936 246 239 194 147 96 88
15 84 78 87 193 794 903 235 238 192 147 95 90
16 84 78 88 198 861 879 229 237 190 148 95 92
17 82 78 89 201 912 858 225 237 188 144 97 90
18 80 78 89 204 972 822 219 237 184 140 98 86
19 79 77 90 211 1,030 798 212 238 179 135 99 84
20 78 77 90 224 1,100 774 207 237 175 129 97 84
21 78 78 91 239 1,110 742 203 236 170 130 97 85
22 78 79 95 248 1,100 712 202 238 166 134 97 86
23 78 79 98 261 1,120 678 201 241 161 137 97 86
24 78 78 99 274 1,130 647 200 236 160 136 96 86
25 78 80 102 291 1,150 616 199 234 158 134 96 85
26 78 83 104 298 1,200 580 197 233 153 130 94 84
27 78 83 107 303 1,230 549 203 232 150 129 93 84
28 78 84 109 308 1,240 521 208 230 149 127 89 84
29 78 86 113 310 1,250 498 208 229 146 125 88 85
30 78   115 313 1,250 474 213 229 143 124 88 84
31 78   118   1,230   217 228   122   84