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USGS Daily Statistics for the Nation

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 -> 2023-09-30)

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
1 159 140 140 176 167 261 346 113 174 208 222 205
2 156 141 139 174 165 270 337 112 172 205 220 205
3 153 151 138 182 165 289 336 110 173 199 220 207
4 152 156 139 183 168 312 338 106 173 198 220 202
5 153 149 140 185 163 326 331 108 172 197 218 195
6 152 148 140 189 157 344 317 104 175 196 221 194
7 153 148 144 191 161 366 301 103 178 197 221 191
8 153 146 146 193 177 388 289 101 179 195 225 189
9 152 142 148 192 188 398 275 99 181 196 219 189
10 150 141 149 193 192 400 263 101 183 198 220 187
11 150 141 150 186 197 395 252 106 184 199 218 185
12 151 141 152 188 197 389 248 108 186 200 218 184
13 148 142 151 190 198 392 242 110 184 202 217 181
14 145 142 152 191 194 399 240 112 185 202 217 181
15 143 142 153 188 186 403 233 115 184 206 216 183
16 140 142 154 183 179 427 224 116 185 207 216 182
17 138 144 159 188 172 462 207 118 186 206 219 183
18 138 142 164 189 171 468 198 118 185 206 222 182
19 137 143 164 189 170 463 191 118 187 208 222 182
20 137 143 164 189 173 445 181 123 189 210 219 184
21 138 142 164 188 187 441 167 127 192 208 220 184
22 139 141 168 189 198 428 154 133 192 210 218 181
23 139 141 170 191 205 396 149 142 193 213 218 179
24 138 138 175 193 208 376 142 145 194 214 217 174
25 138 139 180 192 214 377 136 149 193 215 215 173
26 137 137 183 194 221 379 128 150 195 217 212 172
27 135 137 181 191 217 376 126 156 195 217 209 169
28 137 138 182 185 213 362 126 161 198 218 207 168
29 139 148 182 185 218 346 120 166 204 217 206 166
30 141   183 181 236 330 118 168 204 215 204 166
31 139   183   248   114 170   214   163