Pertinent Data

GENERAL
Drainage area, square miles: 265
Pool elevations, ft. above msl
Maximum pool: 860
Full pool (crest of spillway): 835
Maximum conservation pool: 832
Minimum pool: 770.5

RESERVOIR
Full pool, acre/feet: 77,600
Maximum conservation pool, acre-fee:t 72,050
Minimum pool, acre-feet: 7,090

DAM
Type: Gravel fill embankment structure
Crest length: 2,600 ft.
Crest elevation: 865.5
Crest width: 24 ft.
Maximum height: 145 ft.
Freeboard (above maximum pool): 5.5 ft.

SPILLWAY
Type: Freeflow concrete spillway
Crest length: 200 ft.
Crest elevation: 835
Design discharge: 97,500 ft3/s

OUTLET WORKS
Type gates: 5 hydraulically operated
Capacity at full pool: 9,275 ft3/s

DATE OF COMPLETION: Fall 1949

DATE RESERVOIR FIRST FILLED: May 1950

DATA SOURCE: U.S. Army Corps of Engineers, Portland District

 

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