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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.

UPDATED July 25, 2022: The following stations are part of a short-term project and are scheduled to be discontinued on September 30, 2022 if alternative funding can not be secured.
  • 06192900 Dugout Creek near mouth, near Willsall, MT
  • 12355342 Hallowat Creek above Kletomus Creek, near Olney, MT
  • 12355347 Big Creek below Lookout Creek, near Apgar, MT

Please contact the Wyoming-Montana Science Center for more information.

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 12323720 Willow Creek at Opportunity, MT


Deer Lodge County, Montana
Hydrologic Unit Code 17010201
Latitude  46°06'25.79", Longitude 112°48'38.20" NAD83
Drainage area 28.6  square miles
Gage datum 4,930 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 2002-10-01 -> 2022-09-30)

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 4.9 5 5.4 9 17 39 20 8.3 7.6 7.2 6.6 6.2
2 4.9 5.1 5.5 9.1 16 37 18 8.4 7.3 7 6.7 6.2
3 4.9 5.2 5.9 9.2 16 35 17 8.2 6.8 6.9 6.9 6.1
4 4.9 5.3 6 10 17 36 16 8 6.7 7 6.9 6.2
5 4.9 5.3 6 13 17 34 16 8.1 7 7.1 6.8 6
6 5.8 5.2 6.7 13 18 36 15 8.4 6.9 7 6.7 5.9
7 5.1 5.2 8.3 14 20 36 14 8.7 6.8 6.9 6.6 5.8
8 6 5.4 7.7 13 20 37 14 8.6 6.8 6.9 6.9 5.9
9 5.2 5.9 8.4 12 21 36 13 8.5 7.1 6.9 6.7 5.8
10 5.1 6.9 8.5 10 23 37 13 8.6 7.2 6.9 6.7 5.7
11 5 5.5 7.1 9.9 24 34 13 8.8 7 6.9 6.5 5.7
12 4.9 5.7 6.7 10 23 31 12 8.4 6.9 6.8 6.5 5.7
13 5 5.7 6.7 11 23 33 12 8.1 6.9 7 6.6 5.8
14 5 5.5 6.8 11 23 27 11 8.2 6.9 7.1 6.4 5.8
15 5 5.7 7 11 23 25 11 8 7.1 7 6.4 5.7
16 4.9 5.8 7.3 10 25 33 11 7.7 7.1 7 6.7 5.5
17 5.1 5.7 7.3 10 30 36 10 7.6 7.1 7 6.6 5.3
18 5.3 5.5 7.3 10 32 35 10 7.5 7 6.9 6.7 5.3
19 5.1 5.4 7.4 10 34 34 9.4 7.3 7.1 6.9 6.7 5.3
20 5 5.3 7.6 11 35 32 9 7.3 7.2 7.1 6.6 5.3
21 4.8 5.1 8.4 11 36 30 8.7 7.3 7.1 6.9 6.4 5.4
22 4.8 5.1 8.5 12 36 28 8.6 7.2 7.1 6.8 6.6 5.5
23 4.9 5.2 7.8 14 36 25 8.5 7.8 7.1 6.8 6.4 5.4
24 4.9 5.1 7.6 15 38 23 8.3 7.6 7.1 6.7 6.5 5.3
25 5 5.2 7.5 15 41 23 8.2 7.1 6.8 6.8 6.4 5.3
26 4.9 5.2 7.5 15 43 22 8.2 6.9 6.7 6.8 6.4 5.3
27 4.9 5.3 7.5 15 43 22 8.4 7.1 6.7 6.7 6.8 5.2
28 4.9 5.4 7.6 15 43 22 8.6 7 6.7 6.6 6.6 5.1
29 5 5.8 7.5 15 40 26 8.2 6.8 6.8 6.7 6.5 5.1
30 5   7.8 17 38 22 8 6.8 7.2 6.6 6.2 5
31 4.9   8.1   37   8 6.9   6.6   5