Spillway and Outlet Works, Townshend Dam and Reservoir, West River, Vermont; Hydraulic Model Investigation.
Technical rept. Dec 56-Jul 57,
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Pagination or Media Count:
Tests on a 150-scale model were concerned primarily with hydraulic performance of the L-sahped side-channel spillway and longitudinal discharge channel, and over-all performance of the spillway and single-tunnel outlet works. For structural stability, the vertical upstream face of the weir was changed to a 3-on-1 slope during the tests. The tests revealed that the discharge-channel floor could be raised considerably. With these changes, the head on the spillway at the design discharge 200,000 cfs was 25.5 ft the computed head was 25.00 ft. At this discharge, the effect of the L-shaped crest was equivalent to reducing the length of a straight crest by 37.9 ft. Bottom velocities along the upstream face of the dam near the spillway abutment reached 10 fps, indicating need for riprap protection. Author
- Civil Engineering