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General
- Vicinity Map
- Region (Map) ............ Pacific Northwest
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State (Map) ......................... Washington
- County ......................... Grant, Okanogan
- Project ............................ Columbia Basin
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Dam type ...................... Concrete gravity
- Location .. 28 mi NE of Coulee City, WA
- Watercourse ................... Columbia River
- Reservoir .... Franklin D. Roosevelt Lake
- Original construction .............. 1933-1942
- Modified ................ 1967-1974, 1982-1988
- National ID Number ................ WA00262
- Hydrologic Unit Code ...............
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Hydraulics
- Total storage to
El. 1290 ......................... 9,562,000 acre-ft
- Service spillway
Capacity at El. 1290 .......... 1,000,000 cfs -
Outlet works
Capacity at El. 1291.5 .......... 265,000 cfs
- Power outlet capacity ........... 207,000 cfs
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Dimensions
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Hydrology
- Drainage area .......................... 74,100 sq mi
- Hydrometeorological Report ....... HMR 18
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PMF (estimated) .... Snowmelt flood for an
optimum snowpack and a small rainstorm over the basin
- Volume ........................ >125,000,000 acre-ft
over several months
- Peak inflow ............................. 1,230,000 cfs
- Maximum water surface ................ 1321.8 ft
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