Study Reach.--Section 1 is about 0.5 mile downstream from gage.
Gage Location.--Lat 49°00', long 116°11', in SE1/4 sec.10, T.65N., R.2E., on left bank at Eastport, 1,000 ft downstream from international boundary.
Drainage Area.--570 sq mi., approximately.
Gage Datum and Elevations of Reference Points.--Not available.
Stage, Discharge Measurements and Computed n-Values.--Gage heights were 10.25 ft at gage; 20.68 ft (different datum) at section 1. Peak discharges was 8,030 cfs on May 24, 1948.
| Date of Observation | Discharge (ft3/s) | Average Cross Section Area (ft2) | Hydraulic Radius (ft) | Mean Velocity (ft/s) | Slope | Coefficient of Roughness n |
|---|---|---|---|---|---|---|
| 5/24/1948 | 8145.2 | 1044.3 | 6.93 | 7.80 | 0.003647 | 0.038 |
Description of Channel.--Bed of gravel and well-rounded small boulders. Right bank is fairly steep and lined with trees and brush. Left bank slopes gently and has tree and brush cover below section 2.
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://il.water.usgs.gov/proj/nvalues/db_barnes/sites/12306500.shtml[an error occurred while processing this directive]?
Page Contact Information: David Soong
Page Last Modified: December 19, 2012
