Hydroelectric Information for Columbia and Snake River Projects

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Ice Harbor Dam - General Information

Image Source: USACE Digital Visual Library

Dam: Ice Harbor Dam. Snake River. River Mile 9.7

Constructed: 1962 (units 1-3); 1976 (units 4-6)

Owner: U.S. Army Corps of Engineers, Walla Walla District

Normal Operating Pool ¹: 437.0-440.0 feet

Maximum Pool ¹: 446.0 feet

Powerhouse Capacity:

Nameplate capacity: 3 @ 90 MW, 3 @ 111 MW, 603 MW total

Overload capacity: 3 @ 103.5 MW, 3 @ 127.5 MW, 693 MW total

Hydraulic capacity: 106 kcfs

Spillway ²: 590 feet, 10 gates

• Visitor Information: see Ice Harbor Dam Visitor Center page, USACE Walla Walla District
• USACE Walla Walla District for information and history.
• USACE Walla Walla District for Pertinent Data (including stats on cost, reservoir, spillway, and powerplant).
• USACE Hydroelectric Design Center for detailed hydroplant (pdf) information.