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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 06118500 South Fork Musselshell R ab Martinsdale MT


Meagher County, Montana
Hydrologic Unit Code 10040201
Latitude  46°27'11.67", Longitude 110°22'56.24" NAD83
Drainage area 268  square miles
Gage datum 4,900 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 1941-10-01 -> 2020-09-30)

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 18 20 22 78 187 433 163 31 21 28 31 25
2 18 20 21 78 194 420 154 32 21 28 31 26
3 18 19 20 77 195 427 147 32 20 28 30 26
4 18 19 20 76 212 458 140 30 19 29 31 25
5 18 19 21 81 232 463 130 30 19 28 30 25
6 18 19 22 88 250 436 119 29 19 29 29 24
7 19 20 24 96 259 432 111 28 19 29 29 23
8 19 20 23 96 281 430 104 27 19 29 28 23
9 19 20 22 101 292 423 95 25 19 29 29 23
10 18 21 23 103 307 411 90 25 20 30 29 23
11 18 21 24 110 326 386 92 28 20 30 28 22
12 18 21 25 112 328 366 85 26 21 31 29 22
13 18 22 26 108 332 367 79 25 21 31 28 22
14 18 22 29 119 346 361 75 25 20 31 27 22
15 20 22 32 127 358 348 69 24 22 32 28 29
16 23 21 35 130 367 343 65 23 22 32 28 23
17 25 21 37 130 390 343 62 22 24 32 27 22
18 21 22 42 130 424 339 59 21 24 32 26 22
19 20 22 45 135 415 460 59 21 25 31 25 22
20 19 22 41 146 398 405 60 23 24 31 25 22
21 19 23 41 153 410 337 53 25 25 31 26 23
22 19 23 44 147 427 310 49 23 26 31 26 22
23 19 23 48 146 442 275 46 24 25 31 26 23
24 19 23 51 150 450 250 43 25 24 31 28 22
25 19 23 55 158 445 244 40 23 24 31 27 21
26 20 23 55 159 449 252 38 21 25 31 26 21
27 20 22 60 161 451 229 36 22 26 31 26 21
28 18 21 61 163 457 213 35 21 27 30 26 21
29 18 22 61 174 462 189 35 20 27 30 26 20
30 18   68 181 459 174 33 21 27 29 25 19
31 19   74   453   32 21   30   19