Easton Diversion Dam located on the Yakima River near Easton, is a concrete gravity ogee weir, movable crest structure. This dam is 66 feet high and contains 5,800 cubic yards of concrete.
Intensive Federal, State, tribal, and local efforts in conjunction with the Northwest Power Planning Council resulted in Congress authorizing implementation of Phase I of the Yakima River Basin Water Enhancement Project in 1984. The purpose of Phase I is to reduce anadromous fish mortality at outdated fish ladders at diversion dams and inadequate fish screens at diversion canals. Ladders and screens at the largest diversion dams and canals were completed in 1989 and a similar program is underway at the smaller diversions.
General
Project
Yakima
Longitude
-121.1880397
Watercourse
Yakima River
Original Construction
1928-1929
National ID Number
WA00279
Dam Type
Concrete Gravity
Latitude
47.24154
Reservoir
Lake Easton
Dimensions
Structural Height
66.0 ft
Crest Length
248.0 ft
Top of Active Conservation Pool (Elevation)
2181.0 ft
Volume of Dam Construction Materials
5800 cu yd
Spillway Crest Elevation
2181.0 ft
Crest Elevation
2184.5 ft
Hydraulic Height (Normal Operating Depth at Dam)
43.0 ft
Hydraulics & Hydrology
Normal Water Surface Elevation
2181.0 ft
Spillway Type
Overflow Drum Gate
Total Water Storage at Elevation
3,992 ac-ft
Outlet Works Capacity at Elevation
1,320 cfs
Spillway Capacity at Elevation
13,000 cfs
Contact
Owner
Title: Area Office Manager Organization: Columbia-Cascades Area Office Address: 1917 Marsh Road City: Yakima, WA 98901-2058 Fax: 509-454-5611 Phone: 509-573-8000
Operator
Organization: Kittitas Reclamation District Address: PO Box 276 City: Ellensburg, WA 98926-0276 Phone: 509-925-6158
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