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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 06058502 Missouri R bl Canyon Ferry Dam nr Helena MT
Lewis And Clark County, Montana
Hydrologic Unit Code 10030101
Latitude  46°38'58", Longitude 111°43'39" NAD27
Drainage area 15,904  square miles
Gage datum 3,640 feet above NGVD29
Output formats
HTML table with channel data
HTML table without channel data
Tab-separated data with channel data
Tab-separated data without channel data
Graph of data
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Meas.
Number		   Date       Time Time
Datum		 Measurement
Used?		   Who Measuring
Agency		 Stream
flow
(ft3/s)		 Gage
Height
(ft)		 GH
Change
(ft)		 Meas.
Duration
(hr)		 Meas.
Rated		   Control Flow
Adjust.
Code 
2025-01-17 15:11MSTYesKDV/MJWUSGS4660 Fair NONE