Study Reach.--Section 1 is about 0.25 mile upstream from gage.
Gage Location.--Lat 47°01'10", long 113°13'40", in SE1/4 NW1/4 sec.34, T.15N., R.13W.,on left bank 0.25 mile upstream from Monture Creek and 5 miles west of Ovando.
Drainage Area.--1,274 sq mi.
Gage Datum and Elevations of Reference Points.--Not available.
Stage, Discharge Measurements and Computed n-Values.--Gage height were 6.84 ft at gage; 16.34 ft at section 1. Peak discharge was 8,200 cfs on May 22, 1948.
Date of Observation | Discharge (ft3/s) | Average Cross Section Area (ft2) | Hydraulic Radius (ft) | Mean Velocity (ft/s) | Slope | Coefficient of Roughness n |
---|---|---|---|---|---|---|
5/22/1948 | 8212.1 | 1185.0 | 6.05 | 6.93 | 0.002329 | 0.031 |
Description of Channel.--Bed is gravel and boulders; d50 = 155 mm, d84 = 280 mm. Banks consist of same material and are relatively free of vegetation.