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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 06111800 Big Spring Cr at R&B Trading Post nr Lewistown MT


Fergus County, Montana
Hydrologic Unit Code 10040103
Latitude  47°05'16.2", Longitude 109°27'27.0" NAD83
Drainage area 191  square miles
Gage datum 3,843 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 2014-10-01 -> 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
1 154 158 162 174 219 217 176 133 143 161 163 159
2 154 158 162 172 217 256 172 133 140 161 164 159
3 154 157 163 170 213 290 172 132 139 167 166 159
4 154 156 166 172 208 309 173 132 140 175 166 159
5 154 156 165 175 204 308 172 134 142 173 164 158
6 154 157 166 177 206 290 170 135 141 166 163 156
7 154 161 172 180 215 276 172 134 142 163 162 157
8 154 163 168 182 232 272 170 134 143 163 161 158
9 153 165 166 185 276 278 166 134 145 164 162 158
10 153 188 164 190 283 267 162 133 145 162 163 158
11 154 171 163 201 282 247 168 134 143 162 161 158
12 153 162 166 205 278 236 163 134 147 163 161 157
13 153 161 166 194 273 232 159 135 149 163 161 157
14 154 160 170 188 255 218 155 135 147 164 162 156
15 153 160 182 186 244 204 153 136 148 163 161 157
16 153 162 188 183 241 197 150 137 151 163 162 155
17 153 165 176 182 246 193 148 138 151 163 162 156
18 154 162 171 184 245 199 146 141 174 161 162 156
19 154 160 172 188 231 197 144 144 171 161 162 156
20 154 161 172 185 226 192 143 146 161 162 162 156
21 154 159 180 189 227 192 144 147 161 162 161 156
22 154 158 217 194 222 195 144 146 163 164 161 156
23 155 158 227 195 219 188 144 146 162 164 161 155
24 155 159 214 198 220 196 142 145 158 163 161 156
25 156 163 201 206 215 194 141 147 155 163 160 155
26 158 164 195 212 222 181 141 149 154 163 160 154
27 161 159 183 221 238 178 143 146 155 162 160 155
28 162 159 175 228 249 175 143 146 156 162 160 156
29 164 169 174 223 227 191 139 143 157 162 159 155
30 161   176 220 214 185 137 144 158 162 158 154
31 159   177   210   134 143   165   154