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USGS Daily Statistics for Montana

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Questions or concerns about USGS streamflow data in Montana and Wyoming can be directed to Kirk Miller (kmiller@usgs.gov; 307-775-9168).


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 06200000 Boulder River at Big Timber MT


Sweet Grass County, Montana
Hydrologic Unit Code 10070002
Latitude  45°50'01.66", Longitude 109°56'19.34" NAD83
Drainage area 525  square miles
Gage datum 4,056.3 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 1947-10-01 -> 2019-09-30)

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
1 136 128 120 147 392 2,250 2,380 394 168 203 213 174
2 135 127 120 150 417 2,290 2,280 376 167 205 207 173
3 136 128 120 147 440 2,400 2,230 353 165 206 207 172
4 136 128 120 146 475 2,570 2,160 337 162 210 209 169
5 139 128 121 148 494 2,760 2,080 320 160 211 206 162
6 136 125 126 152 535 2,950 1,980 302 161 213 206 160
7 135 124 125 158 591 2,970 1,910 285 161 215 206 161
8 135 124 125 163 647 2,960 1,820 269 158 215 208 159
9 136 125 126 165 688 2,930 1,710 255 161 215 206 158
10 139 127 128 169 714 2,920 1,640 241 163 216 202 164
11 138 127 127 173 751 2,810 1,560 232 168 218 198 167
12 138 129 127 178 784 2,730 1,440 224 178 220 196 168
13 141 130 127 181 849 2,770 1,340 219 180 218 198 164
14 142 129 127 186 883 2,860 1,270 213 178 218 199 161
15 144 128 128 192 944 2,840 1,190 205 178 221 192 156
16 140 131 130 196 997 2,890 1,100 200 177 226 194 153
17 137 134 132 200 1,090 2,920 1,010 195 176 228 196 149
18 137 133 134 208 1,160 2,880 940 191 178 227 195 146
19 135 132 135 219 1,220 2,890 879 191 188 225 192 150
20 135 130 134 230 1,340 2,860 837 188 195 224 190 146
21 135 128 135 242 1,480 2,850 779 189 197 223 186 149
22 134 128 137 257 1,550 2,850 725 189 199 224 179 148
23 136 128 136 282 1,620 2,800 676 189 195 220 177 145
24 137 126 137 298 1,680 2,760 631 193 196 220 185 141
25 135 126 137 312 1,800 2,720 596 188 195 218 186 143
26 133 123 138 320 1,880 2,660 563 184 195 218 181 144
27 131 123 139 327 1,970 2,620 525 176 197 215 176 144
28 129 122 139 336 2,100 2,550 491 172 199 214 174 145
29 130 123 139 351 2,210 2,460 463 172 196 214 173 146
30 129   141 367 2,200 2,430 446 172 195 210 174 141
31 129   145   2,190   419 171   217   139