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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 06019500 Ruby River above reservoir near Alder, MT


Madison County, Montana
Hydrologic Unit Code 10020003
Latitude  45°11'32.35", Longitude 112°08'34.14" NAD83
Drainage area 534  square miles
Gage datum 5,400 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 1937-10-01 -> 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
1 104 101 103 120 240 548 291 136 111 121 127 115
2 103 101 101 123 248 552 279 134 111 122 126 115
3 103 102 100 123 263 551 269 133 110 124 126 114
4 103 101 101 127 279 561 261 133 110 124 127 114
5 102 101 101 131 286 564 253 132 110 125 127 113
6 102 101 102 134 296 575 241 129 111 124 126 112
7 103 102 103 137 313 564 233 126 111 124 127 112
8 104 101 104 138 322 557 226 125 111 125 126 111
9 103 101 104 140 334 535 218 125 111 124 125 110
10 102 102 104 142 341 534 216 124 112 124 124 110
11 103 103 105 143 346 518 210 122 114 124 124 110
12 103 105 106 144 351 503 201 121 114 125 124 110
13 103 104 107 145 372 499 192 120 114 124 124 110
14 103 103 106 150 386 492 188 118 114 124 123 110
15 103 101 106 153 410 481 183 117 114 125 122 110
16 103 101 107 153 444 478 177 116 114 126 122 109
17 102 100 110 160 463 473 171 114 115 126 121 108
18 103 101 111 162 465 448 170 113 116 125 121 107
19 103 101 112 164 471 437 164 113 117 125 121 108
20 103 102 112 169 488 423 159 114 119 125 120 108
21 102 101 114 176 510 407 156 116 121 125 118 108
22 102 101 116 184 509 399 154 115 122 126 117 109
23 102 100 119 193 509 384 154 114 121 126 116 108
24 102 101 120 199 517 379 150 114 120 127 118 107
25 102 100 120 206 522 377 147 114 119 126 118 107
26 102 100 120 204 532 358 146 114 119 128 117 107
27 102 100 121 209 543 346 143 111 119 127 116 107
28 101 101 119 215 552 334 142 109 119 127 116 106
29 100 106 116 226 565 317 141 110 119 127 116 106
30 102   116 235 562 304 140 110 120 126 115 106
31 102   118   552   138 112   127   105