West Fork Bitterroot River near Conner, Mont


Study Reach.--Section 1 is about 600 ft downstream from gage.

Gage Location.--Lat 45°44', long 114°17', in NE1/4 NW1/4 sec.26, T.1S., R.22W., on right bank 0.5 mile downstream from Painted Rocks Lake, 6 miles upstream from Nez Perce Creek, and 16 miles southwest of Conner.

Drainage Area.--317 sq mi.

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

Stage, Discharge Measurements and Computed n-Values.--Gage heights were 6.08 ft at gage; 3.27 ft at section 1. Peak discharges was 3,880 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 3880.9 504.7 4.67 7.69 0.004618 0.036

Description of Channel.--Bed is gravel and boulders; d50 = 172 m, d84 = 265 mm. The left bank is lined with overhanging bushes. The right bank is lined with trees.

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Page Last Modified: December 19, 2012