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Stream Flow Data

Provisional And Subject To Revision

Snake R below Hells Canyon Dam


05/16/2017 through 05/23/2017


Station No.


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Actual operations may differ depending on system reliability needs.

Additional flow information is available on flow monitors located at the Hells Canyon Visitors Center, Pittsburg Landing, Cache Creek, Heller Bar, Hells Gate Marina, and at the US Forest Service Hells Canyon National Recreation Area office in Clarkston, Washington.

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Daily Graph

Snake R below Hells Canyon Dam

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Most recent value is: 38184.00 cfs as of: 2017-05-21 00:00:00.0

Minimum Value: 38184.00      Maximum Value: 43286.50


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15 Minute Graphs

Snake R below Hells Canyon Dam

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Most recent value is: 33900 cfs as of: 2017-05-22 20:45:00.0

Minimum Flow Value: 33900      Maximum Flow Value: 51300

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Most recent value is: 73.00 feet as of: 2017-05-22 20:45:00.0

Minimum Stage Value: 73.00      Maximum Stage Value: 77.00


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Station Information For:

Snake R below Hells Canyon Dam

Detail records Time Zone: MPT. Note: Daily totals are in MST
LOCATION.-Lat 45º15'05", long 116º41'50" in SE¼SE¼ sec. 33, T.03S., R. 49E, unsurveyed Willamette meridian, Wallowa County, Oregon, Wallowa-Witman National Forest, Hydrologic Unit 17050201, on left bank 0.2 mi upstream from Hells Canyon Creek, 0.4 mi downstream from Deep Creek, 0.6 mi downstream from Hells Canyon Dam,15.5 mi northeast of Homestead, and at mile 247.0.

DRAINAGE AREA.-73,300 mi², approximately.

PERIOD OF RECORD.-July 1965 to September 2001 (discontinued by USGS). Gage operated by Idaho Power Company beginning October 2001 and continuing to present.

GAGE.-Water-stage recorder. Datum of gage is 1,400.00 ft above sea level (levels by Idaho Power Company).

REMARKS.-Station equipment includes satellite and radio telemetry. Diurnal fluctuations caused by Hells Canyon power plant.

EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 103,000 ft³/s Jan. 2, 1997, gage height 86.17 ft; minimum, 1,580 ft³/s Mar. 19, 1967, gage height, 59.9 ft; minimum daily, 4,360 ft³/s May 8, 1977.



The 12-month period between Oct. 1st and Sept. 30th. For details, click on the word.

The status of data subject to revision upon review and correction by Idaho Power. For details, click on the word.

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