McNary Dam - Hydroelectric Project Information

McNary Dam image
Image Source: USACE, Portland District

General Information

Dam:
McNary Dam. Columbia River. River Mile 292.0
Constructed:
1957; second powerhouse deauthorized 1991
Owner:
U.S. Army Corps of Engineers, Walla Walla District
Normal Operating Pool1:
335.0-340.0 feet
Maximum Pool1:
356.5 feet
Powerhouse Capacity:
Nameplate capacity: 14 @ 70 MW, 980 MW total
Overload capacity: 14 @ 80.5 MW, 1127 MW total
Station service units: 2 @ 3 MW, 6 MW total
Hydraulic capacity: 232 kcfs
Spillway:
1310, 22 gates

1 From USACE Walla Walla District, Structural Details Map.

Additional Information

McNary Dam web page.Contact U.S. Army Corps of Engineers, Walla Walla District for all additional information.

These web pages provide information about the location, construction date, pool elevation, and powerhouse capacity of the major federal and non-federal hydroelectric projects in the Columbia Basin. All information is courtesy of U.S. Army Corps of Engineers, NWD unless otherwise noted. The information and images are from the Army Corps of Engineers 1989 publication, "Columbia River and Tributaries Review Study: Project Data and Operating Limits" unless otherwise noted. USACE makes no warranties concerning the accuracy, reliability, or suitability of the data for any particular purpose. Pages include links to the owners/operators hydroelectric project web sites with visitor/tour information and further information. The map and these web pages cover only the major federal and non-federal dams in the region.

Columbia Basin Research provides these web pages for informational purposes only. Columbia Basin Research is not affiliated with any hydroelectric project. Please contact the Owner/Operator for questions about operations, tours, and any other matter.
Thank you.