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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 06178000 Poplar River at international boundary


Daniels County, Montana
Hydrologic Unit Code 10060003
Latitude  48°59'25.03", Longitude 105°41'48.87" NAD83
Drainage area 358  square miles
Gage datum 2,460 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 1930-10-01 -> 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. 0.3 20 105 27 24 16 2.1 1.7 2.2 4.7 0.
2 0. 0.3 18 85 25 18 11 4.8 1.4 2.2 4.5 0.
3 0. 0.3 17 79 24 20 9.5 2.4 1.3 2.3 5 0.
4 0. 0.3 18 69 24 21 13 1.6 1.3 2.4 4.9 0.
5 0. 0.3 20 75 22 19 20 1.7 1.3 2.6 4.6 0.
6 0. 0.3 20 133 22 17 11 1.4 1.1 2.6 4.6 0.
7 0. 0.27 19 129 25 19 13 1.2 1.2 2.6 4.6 0.
8 0. 0.27 19 113 24 22 11 2.8 3.4 2.7 4.5 0.
9 0. 0.23 19 106 22 18 8.8 1.6 1.7 2.6 4.8 0.
10 0. 0.2 24 98 21 16 7.2 1.2 1.4 2.6 5 0.
11 0. 0.17 38 101 20 19 11 1.1 1.5 2.6 5.1 0.
12 0. 0.13 53 114 20 19 7.8 1.1 1.9 2.7 5 0.
13 0. 0.13 61 115 19 20 6.9 1.4 2 2.8 5.1 0.
14 0. 0.2 68 112 19 16 5.9 1 1.8 2.9 5.2 0.
15 0. 0.27 73 97 17 17 4.9 1.4 1.6 3.1 5.4 0.
16 0. 6.7 72 72 16 15 4 2.1 1.8 3.2 5.4 0.
17 0. 33 82 65 15 21 3.6 1.3 1.8 3.3 5.3 0.
18 0. 83 77 59 15 23 3.3 1.1 1.8 3.3 5.1 0.
19 0. 117 92 56 15 17 3.5 1.1 2.1 3.3 4.7 0.
20 0. 100 89 42 16 16 5.7 0.98 2.4 3.4 4.1 0.
21 0. 50 113 48 19 53 3.6 2 1.8 3.5 4.2 0.
22 0. 38 119 73 22 23 20 1.6 1.7 3.5 4.3 0.
23 0. 28 112 78 18 17 5.2 1.2 1.7 3.6 4.5 0.
24 0. 17 99 58 20 14 3 1.1 1.7 3.6 4.7 0.
25 0. 12 102 43 19 12 2.1 1.3 1.7 3.7 4.5 0.
26 0. 8.4 100 36 16 10 5.1 1.5 1.9 3.7 5.4 0.
27 0. 9 109 35 16 12 10 1.3 1.8 3.8 4.5 0.
28 0. 8.2 107 34 17 16 5.1 1.3 1.8 3.8 4.5 0.
29 0. 70 122 31 25 14 5 1.5 1.9 3.9 4.5 0.
30 0.   129 30 20 13 3.7 1.2 2 4 4.4 0.
31 0.   122   23   2.5 1.6   4   0.