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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 06197800 East Boulder River bl Dry Fork Cr nr Mcleod, MT


Sweet Grass County, Montana
Hydrologic Unit Code 10070002
Latitude  45°30'44.4", Longitude 110°05'15.8" NAD83
Drainage area 38.9  square miles
Gage datum 6,152 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 2019-10-01 -> 2025-09-30)

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 7.4 5.4 4.9 4.8 20 306 138 26 17 16 15 11
2 7.3 5.2 4.9 4.7 23 321 131 27 17 17 16 11
3 7.3 5.1 4.8 5 26 387 123 28 16 17 16 11
4 7.2 5.2 4.8 5.3 28 409 127 27 17 17 16 11
5 7.1 5.2 4.8 5.4 31 452 112 29 17 18 16 11
6 6.9 5.2 4.7 5.5 29 438 103 27 16 18 15 10
7 6.8 5.2 4.6 5.4 31 407 99 27 16 17 15 10
8 6.6 5.3 4.8 5.4 33 353 90 26 16 17 14 10
9 6.6 5.2 4.6 5.4 33 343 78 25 18 16 14 10
10 6.6 5.2 4.6 5.6 28 394 74 27 17 16 14 10
11 6.6 5.2 4.5 6 28 387 67 25 17 17 14 10
12 6.5 5.2 4.5 6.7 29 407 60 24 17 17 14 10
13 6.4 5.2 4.5 6.8 34 450 57 24 16 17 14 9.9
14 6.3 5.1 4.5 7.1 46 341 55 23 16 17 14 10
15 6.3 5 4.4 7.4 54 287 53 22 15 17 14 9.7
16 6.2 4.9 4.5 7.6 69 256 49 22 15 18 13 9.5
17 6.1 4.9 4.5 7.7 90 264 45 21 15 20 13 9.4
18 6 5 4.4 7.3 113 276 42 21 21 19 13 9.2
19 5.7 5.2 4.5 7 142 230 39 22 20 19 13 8.9
20 5.7 5.2 4.5 7.1 156 191 38 24 18 20 13 8.7
21 5.7 5.1 4.5 7.2 143 174 36 23 18 19 12 8.5
22 5.6 5.1 4.4 6.6 133 179 35 22 20 19 12 8.4
23 5.7 5 4.4 6.9 136 191 34 20 19 19 12 8.3
24 5.7 5 4.5 7 127 221 32 20 18 18 12 8.2
25 5.7 5 4.6 7.8 121 184 31 19 17 18 12 8.1
26 5.7 5 4.6 8.8 127 160 31 19 17 18 12 8
27 5.6 4.8 4.6 9.1 156 167 30 19 16 17 11 7.6
28 5.5 4.9 4.8 9.1 198 178 30 19 16 17 11 7.4
29 5.6 6.3 4.7 10 226 172 29 18 15 16 11 7.4
30 5.5   4.7 15 267 145 29 18 15 16 11 7.4
31 5.5   4.7   312   27 17   16   7.4