Hydroelectric Information for Columbia and Snake River Projects

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The Dalles Dam - General Information

Image Source: USACE Digital Visual Library

Dam: The Dalles Dam. Columbia River. River Mile 191.5

Constructed: 1960 (units 1-14); 1973 additional units 15-22 completed

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

Full Pool: 160.0 feet

Minimum Pool: 155.0 feet

Powerhouse Capacity:

Nameplate capacity: 14 @ 78 MW, 8 @ 85.975 MW, 1779.8 MW total

Overload capacity: 14 @ 89 MW, 8 @ 99 MW, 2038 MW total

Fishwater units: 2 @ 13.5 MW, 27 MW total

Stations service units: 2 @ 3 MW, 6 MW total

Hydraulic capacity: 375 kcfs

Spillway: 1380 feet, 23 gates

• Visitor Information: see The Dalles Dam Tour Information page, USACE Portland District
• USACE Portland District for project details (includes power, navigation, fish passage, tour, and history and culture information) and color photo.
• USACE Hydroelectric Design Center for detailed hydroplant (pdf) information.