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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 12323800 Clark Fork near Galen MT


Deer Lodge County, Montana
Hydrologic Unit Code 17010201
Latitude  46°12'29.67", Longitude 112°46'02.46" NAD83
Drainage area 656  square miles
Gage datum 4,749 feet above NGVD29
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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 1987-10-01 -> 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 98 94 95 124 188 440 299 99 81 85 107 107
2 96 94 95 125 189 439 283 97 79 87 109 106
3 95 95 96 126 192 441 275 92 78 88 111 105
4 93 97 98 129 195 447 265 89 78 92 113 105
5 91 99 99 132 199 463 252 91 78 96 114 102
6 90 98 102 138 206 487 239 91 79 98 115 100
7 91 103 105 141 215 487 228 90 80 99 112 98
8 92 104 107 147 222 480 217 87 80 99 113 97
9 91 108 111 148 228 469 206 84 83 99 113 96
10 90 107 125 149 233 458 197 82 84 101 112 97
11 90 103 132 150 240 456 192 82 82 100 113 97
12 89 102 131 151 242 445 182 81 81 102 113 98
13 90 102 129 151 249 445 176 81 81 104 113 98
14 88 100 130 151 255 435 170 81 81 105 111 97
15 89 100 128 147 265 422 162 79 83 106 109 96
16 90 99 129 142 281 428 154 80 84 106 108 93
17 92 99 128 142 307 442 149 80 84 107 109 93
18 92 99 125 146 326 446 146 81 83 106 109 92
19 93 99 124 149 342 439 142 78 85 105 110 92
20 93 98 124 151 352 429 140 78 87 107 111 91
21 93 100 126 156 356 415 132 80 85 108 108 90
22 92 100 127 162 359 409 128 81 84 109 108 90
23 93 98 127 169 359 395 124 84 85 108 106 91
24 92 97 129 177 364 379 119 84 83 108 107 90
25 92 97 128 180 378 364 116 85 83 109 107 88
26 93 97 127 181 380 350 112 84 82 108 106 87
27 94 94 127 181 388 338 111 82 81 108 105 87
28 93 94 126 180 397 328 110 83 82 108 104 87
29 92 105 124 180 413 320 107 81 82 109 104 88
30 92   124 185 424 314 105 79 84 109 105 88
31 93   123   431   101 80   108   91