In 2005, a spillway weir was also installed to improve passage conditions for juvenile salmon downstream outmigration. Two fish ladders provide adult fish upstream passage through Ice Harbor Lock and Dam.

During fiscal year 2017, 1.93 billion kilowatt hours of electricity were produced. Small-scale model testing of the new fixed-blade runner design indicate increased power generation by 3 to 4 percent. The work also includes structural modifications to the turbine draft tube exits, wicket gates and stay vanes to improve hydraulic conditions for fish. The first of three new, advanced-technology turbine runners designed to improve fish passage was installed and became operational in 2018. The powerhouse has three 90,000-kilowatt units and three 111,000-kilowatt units – 603-megawatt total powerhouse capacity.

In fiscal year 2021, traffic through the navigation lock consisted of grains, petroleum products, fertilizer, wood products, and miscellaneous cargo that amounted to 3,504,819 tons. This is a single-lift lock, 86 feet wide by 675 feet long, with a 100-foot vertical lift. Lake Sacajawea, created by Ice Harbor Dam, extends upstream about 32 miles to Lower Monumental Lock and Dam and has a surface area of 9,200 acres. The dam has a 10-bay spillway that is 590 feet long and includes ten 50-foot tainter gates. It includes a navigation lock with clear dimensions of 86 by 675 feet. It is a concrete gravity type dam, with an earthfill embankment section at the north abutment. Located upstream of McNary Lock and Dam and Lake Wallula, Ice Harbor Dam is 2,822 feet long with an effective height of 100 feet. It provides navigation, hydropower, flood risk management, fish and wildlife habitat, recreation and incidental irrigation. This project consists of Ice Harbor Dam, powerhouse, navigation lock, two fish ladders, a removable spillway weir and a juvenile fish bypass facility. The entire project including recreational facilities is now complete. Powerhouse units four through six were later installed, with all units producing power by January 1976.

Generators one through three were put in operation in December 1961. The project was authorized by the River and Harbor Act of 1945.Ĭonstruction of the Ice Harbor project began in January 1956.

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