Clearwater River at Kamiah, Idaho


Study Reach.--Section 1 is about 5.8 miles downstream from gage.

Gage Location.--Lat 46°14', long 116°01', in sec.1, T.33N., R.3E., on left bank 0.25 mile downstream from highway bridge at Kamiah, 0.75 mile downstream from Lawyer Creek, and 6 miles downstream from South Fork.

Drainage Area.--4,850 sq mi., approximately.

Gage Datum and Elevations of Reference Points.--Not available.

Stage, Discharge Measurements and Computed n-Values.--Gage heights were 19.22 ft at gage; 46.17 ft at section 1. Peak discharges was 99,000 cfs on May 29, 1948.

Date of Observation Discharge (ft3/s) Average Cross Section Area (ft2) Hydraulic Radius (ft) Mean Velocity (ft/s) Slope Coefficient of Roughness n
5/29/1948 99013.4 11213.3 19.61 8.83 0.000789 0.033

Description of Channel.--Bed is composed of gravel and boulders with some exposed bedrock. Channel is bordered by railroad on the right and highway on the left. Banks are gravel and rock and have light vegetation cover.

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Page Last Modified: December 19, 2012