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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 -> 2021-09-30)

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
1 160 164 166 189 216 231 183 144 149 167 171 165
2 161 165 166 183 215 251 178 143 147 168 170 165
3 160 163 170 181 211 241 177 141 145 175 171 165
4 161 162 176 184 210 304 176 142 146 188 172 165
5 161 163 176 189 206 314 173 144 149 184 171 164
6 161 164 178 191 204 295 173 142 149 175 170 163
7 162 169 187 198 218 282 172 141 150 172 168 163
8 161 173 182 199 229 271 171 140 151 171 168 165
9 160 176 179 198 249 263 170 140 152 173 169 164
10 159 209 175 198 239 252 169 140 152 172 171 165
11 161 184 173 201 232 227 180 141 152 171 168 164
12 160 171 176 196 233 215 173 142 159 170 168 164
13 160 169 175 194 249 217 169 143 159 172 168 164
14 160 168 178 192 244 210 164 143 158 172 169 163
15 159 169 197 194 241 205 161 145 158 171 168 164
16 160 172 207 191 247 203 160 145 160 171 169 162
17 159 176 190 191 263 202 159 147 160 171 169 162
18 160 172 183 192 267 203 158 150 159 169 169 162
19 161 169 184 193 247 202 155 150 161 170 170 163
20 161 170 184 196 241 197 153 150 163 171 169 162
21 161 168 197 204 245 194 151 150 166 169 168 163
22 160 166 253 212 240 199 148 150 165 169 167 163
23 160 166 268 212 233 196 150 150 165 169 167 162
24 161 165 249 212 234 190 149 151 163 169 167 163
25 162 165 229 216 228 185 148 153 162 168 167 163
26 165 164 220 213 227 177 149 157 162 168 165 160
27 170 165 203 217 268 172 153 152 162 169 166 159
28 167 166 190 223 296 171 157 151 164 169 167 161
29 165 171 189 220 262 201 152 149 166 169 165 159
30 165   192 215 242 196 148 149 165 169 164 159
31 164   194   235   147 149   174   159