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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 06139500 Big Sandy Creek near Havre MT


Hill County, Montana
Hydrologic Unit Code 10050005
Latitude  48°31'36.17", Longitude 109°50'29.68" NAD83
Drainage area 1,787  square miles
Gage datum 2,510 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 1945-10-01 -> 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 0. 0. 7.1 128 27 49 42 11 5.5 11 5.8 0.03
2 0. 0. 7.9 141 27 53 40 11 5.2 11 7.2 0.03
3 0. 0. 5.1 158 28 59 37 11 4.8 11 0.94 0.03
4 0. 0. 3.4 155 26 74 33 11 4.9 12 0.04 0.03
5 0. 0. 4.5 144 25 87 33 10 5.1 12 0.05 0.03
6 0. 0. 1.7 115 25 104 31 9.5 5.2 13 0.05 0.03
7 0. 0. 3 97 24 91 33 9.8 5.2 14 0.05 0.04
8 0. 0. 3.4 89 25 87 32 8.8 5.1 14 0.05 0.04
9 0. 0. 2.4 77 28 82 30 8.4 5.2 13 0.05 0.04
10 0. 0. 2.5 77 31 75 28 8.4 5 13 0.04 0.04
11 0. 2 2.9 90 34 70 27 7.4 4.9 12 0.04 0.03
12 0. 19 1.9 105 39 65 27 7.1 4.8 12 0.06 0.03
13 0. 18 1.6 95 40 59 31 7.2 5 11 0.06 0.03
14 0. 18 1.5 90 40 54 27 7.2 4.9 10 0.06 0.04
15 0. 17 1.5 83 38 51 27 7.5 4.9 10 0.06 0.04
16 2.1 13 1.4 81 40 49 22 7.6 5.3 10 0.07 0.03
17 5.7 10 1.4 102 40 47 20 7.4 5.7 11 0.07 0.03
18 4.3 8.8 2 118 39 46 19 7.1 6.1 10 0.07 0.01
19 2.1 6.8 11 108 37 48 19 7.1 6.4 11 0.07 0.01
20 0.71 5.3 83 81 37 59 20 7.1 6.6 10 0.07 0.01
21 0. 3.9 228 69 36 65 22 7.1 7.8 9.6 0.06 0.01
22 0. 4 270 53 36 66 20 7 6.8 9.4 0.06 0.
23 0. 5.6 250 43 37 68 18 6.7 6 9 0.04 0.
24 0. 9 185 38 41 66 16 6.6 5.8 9.1 0.04 0.
25 0. 12 117 34 41 56 15 6.4 8 9.3 0.04 0.
26 0. 13 82 32 41 51 14 6.2 8.2 9.3 0.04 0.
27 0. 13 130 30 42 48 14 5.7 8.9 9.3 0.04 0.
28 0. 11 121 29 43 45 14 5.5 9.5 9.4 0.03 0.
29 0. 2.5 108 29 44 47 14 5.4 8.9 9.3 0.03 0.
30 0.   112 28 44 45 12 5.6 8.4 9.6 0.03 0.
31 0.   160   46   12 5.5   9.1   0.