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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 12323710 Willow Creek nr Anaconda, MT


Deer Lodge County, Montana
Hydrologic Unit Code 17010201
Latitude  46°03'52.24", Longitude 112°53'36.71" NAD83
Drainage area 13.7  square miles
Gage datum 5,190 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 2004-10-01 -> 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 1.6 1.4 1.7 4.2 16 32 10 3.2 2.1 2.2 2 1.8
2 1.6 1.4 1.7 4.2 16 31 9.8 3.2 2 2.1 2.1 1.7
3 1.6 1.5 1.7 4.2 17 29 9.5 3.1 1.9 2.1 2.1 1.7
4 1.6 1.5 1.7 4.6 18 28 9 3 2 2.1 2.1 1.8
5 1.6 1.5 1.7 4.7 20 27 8.6 3 2.1 2.2 2.3 1.7
6 1.5 1.5 1.8 4.8 22 26 8.2 3 2 2.1 2 1.7
7 1.5 1.6 1.8 4.9 26 26 7.7 2.9 1.9 2.1 2.2 1.7
8 1.6 1.6 1.8 5.5 27 26 7.4 2.9 1.9 2.1 2.2 1.7
9 1.6 1.7 2.1 5.8 26 25 7 2.8 2 2 2 1.6
10 1.6 1.8 2 5.7 26 25 6.9 2.8 1.9 2 1.9 1.7
11 1.5 1.7 2 5.7 26 23 6.6 2.8 1.8 2.1 1.8 1.7
12 1.5 1.7 2.1 6.2 25 21 6.3 2.6 1.8 2.1 1.8 1.8
13 1.5 1.7 2.2 6.7 24 20 6.2 2.6 1.7 2.4 2 1.8
14 1.5 1.6 2.3 6.8 25 19 6 2.6 1.8 2.1 1.9 1.8
15 1.5 1.6 2.6 6.7 26 18 5.8 2.5 2 2 1.8 1.8
16 1.5 1.6 2.9 6.6 29 18 5.5 2.4 2 2.1 2 1.8
17 1.5 1.6 2.8 6.6 32 19 5.2 2.3 2 2.1 2 1.7
18 1.7 1.6 2.9 7 34 20 5 2.3 1.9 2 2 1.7
19 1.6 1.5 3.1 7.2 35 22 4.7 2.3 1.9 2.1 1.9 1.8
20 1.6 1.5 3.1 8 35 20 4.5 2.3 1.9 2.2 1.9 1.8
21 1.6 1.4 3 9.5 33 18 4.5 2.3 2 2 1.9 1.8
22 1.8 1.5 3.1 11 33 17 4.4 2.3 2 2.1 1.9 1.8
23 1.7 1.4 3.2 13 34 16 4.2 2.7 2.1 2.1 2 1.8
24 1.7 1.5 3.2 13 36 15 4 2.4 2 2.1 2.3 1.7
25 1.7 1.5 3.3 13 38 14 3.8 2.2 2 2.1 2.1 1.8
26 1.6 1.5 3.4 14 38 13 3.7 2.1 2 2 2.1 1.8
27 1.5 1.4 3.4 14 37 13 3.8 2.1 1.9 2 2.1 1.7
28 1.4 1.5 3.5 15 36 12 3.6 2 1.9 2 2 1.7
29 1.5 1.3 3.6 16 35 12 3.5 2 2 2.1 2 1.7
30 1.4   3.8 16 34 11 3.3 2 2.3 2.1 1.9 1.6
31 1.4   4   33   3.2 2   2.1   1.6