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USGS 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 06023000 Ruby River near Twin Bridges MT


Madison County, Montana
Hydrologic Unit Code 10020003
Latitude  45°30'24.89", Longitude 112°19'51.20" NAD83
Drainage area 970  square miles
Gage datum 4,670 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 1939-10-01 -> 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
1 159 140 140 176 168 281 345 113 175 208 222 205
2 156 141 139 174 167 290 336 112 173 206 220 205
3 153 151 138 182 167 308 335 109 174 199 220 207
4 152 156 139 183 170 333 336 107 176 198 220 202
5 153 149 140 185 166 345 329 108 176 197 218 195
6 152 148 140 189 160 361 315 105 178 196 221 194
7 153 148 144 191 164 378 299 104 182 197 221 191
8 153 146 146 193 179 399 288 102 182 194 225 189
9 152 142 148 192 189 414 274 101 184 195 219 189
10 150 141 149 193 193 412 262 102 186 197 220 187
11 150 141 150 186 197 404 252 107 186 198 218 185
12 151 141 152 188 197 399 247 109 188 199 218 184
13 148 142 151 190 199 403 241 111 186 201 217 181
14 145 142 152 191 196 409 239 113 187 201 217 181
15 143 142 153 188 190 411 232 116 186 205 216 183
16 140 142 154 183 186 433 222 117 186 205 216 182
17 138 144 159 188 183 465 206 120 187 205 219 183
18 138 142 164 189 184 471 196 119 187 205 222 182
19 137 143 164 189 182 467 189 119 188 207 222 182
20 137 143 164 189 185 450 179 125 189 209 219 184
21 138 142 164 188 199 444 166 130 192 207 220 184
22 139 141 168 189 212 430 152 136 193 209 218 181
23 139 141 170 191 220 398 148 145 194 212 218 179
24 138 138 175 193 225 378 141 148 195 213 217 174
25 138 139 180 192 235 380 135 152 194 215 215 173
26 137 137 183 194 246 382 128 153 195 216 212 172
27 135 137 181 191 245 378 126 158 195 216 209 169
28 137 138 182 185 243 363 125 163 198 217 207 168
29 139 148 182 185 247 347 120 167 204 216 206 166
30 141   183 181 260 331 118 169 204 214 204 166
31 139   183   270   114 172   213   163