Outlet Works and Stilling Basin, Ririe Dam and Reservoir, Willow Creek, Idaho; Hydraulic Model Investigation.
ARMY ENGINEER DIV NORTH PACIFIC BONNEVILLE OREG DIV OF HYDRAULIC LAB
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Ririe Dam is a 251-ft-high rockfill embankment on Willow Creek near Idaho Falla, Idaho. Flow regulation is provided by an outlet works consisting of an intake tower, two 3.75-ft by 7.0-ft slide valves, an 8.0-ft-wide by 11.25-ft-high conduit, a 20.0-ft-wide by 74.66-ft-long stilling basin, and a riprapped exit channel with bottom as wide as the stilling basin. A portion of the forebay, the hydraulic structures, and 300 ft of exit channel were reproduced in a 125-scale model. The model conduit was sloped to produce the computed specific energy gradient for the design discharge of 1900 cfs.
- Civil Engineering