Dry Falls Dam

Dry Falls Dam
Location	Grant County, Washington, USA
Coordinates	47°37′12″N 119°18′27″W / 47.62000°N 119.30750°W / 47.62000; -119.30750
Opening date	1949[1]
Operator(s)	United States Bureau of Reclamation
Dam and spillways
Impounds	Grand Coulee
Height	123 feet (37 m)[2]
Length	9,800 feet (2,990 m)[2]
Width (base)	480 feet (150 m)[2]
Reservoir
Creates	Banks Lake
Total capacity	1,275,000 acre-feet (1.573 km3)[3]
Catchment area	278.3 square miles (721 km2)[3]
Surface area	27,000 acres (109 km2)

Dry Falls Dam is a rockfaced earthfill type^[4] dam in the U.S. state of Washington. Located in Grant County near Coulee City, it was built as part of the Bureau of Reclamation's Columbia Basin Project. Water from the Columbia River, impounded by Grand Coulee Dam, is pumped into Grand Coulee, a formerly dry canyon, through the short Feeder Canal. Grand Coulee's north end is sealed by North Dam and Dry Falls Dam stretches across the midsection of the Coulee. This allows the water pumped from the Columbia River to fill the upper Grand Coulee, creating a large equalizing reservoir known as Banks Lake. Water from the reservoir is fed into the irrigation project's Main Canal, which runs south from Dry Falls Dam to another reservoir called Billy Clapp Lake, formed by Pinto Dam.