ICE HARBOR LOCK AND DAM-- LAKE SACAJAWEA
(150 dpi) (75 dpi)

Snake River, Washington

CONDITION OF IMPROVEMENT 30 September 1996

CWIS: 00608

AUTHORIZATION: The Ice Harbor Project was authorized by Section 2 of the River and Harbor Act of 1945 (Public Law 79-14, 79th Congress, 1st Session), and was approved March 2, 1945, in accordance with House Document 704, 75th Congress, 3d Session. Recreation was authorized in the River and Harbor Act of 1944 (Public Law 78-534), as amended. The lake behind Ice Harbor Dam has been designated "Lake Sacajawea."

Ice Harbor Lock and Dam-Lake Sacajawea is Unit 1 of 4 included in the "Lower Snake River Project, Washington, and Idaho"

PROJECT: The project consists of Ice Harbor Dam (photo), powerhouse, navigation lock, two fish ladders, and facilities. The project provides navigation, hydroelectric generation, recreation, and incidental irrigation.

Ice Harbor Dam (150 dpi) (75 dpi): The dam is 2,822 feet long, with an effective height of 100 feet. It is of the concrete gravity type, with an earthfill embankment section at the north abutment. It has a ten-bay spillway that is 590 feet long, and ten 50-foot tainter gates.

Lake Sacajawea: At elevation 440, Lake Sacajawea extends northeast 32 miles upstream to Lower Monumental Dam, and has a surface area of 9,200 acres.

Powerhouse: The Ice Harbor powerhouse contained three 90,000-kilowatt units initially. It now has three additional 111,000-kilowatt units. Power generation through September 1994 was 73.81 billion kilowatt hours.

Navigation lock: The lock is a single-lift type with clear plan. It has clear dimensions of 86 feet by 675 feet, and a 15-foot minimum depth.

Fish Passage: There are two fish ladders for passing migratory fish.

Lands: There are 3,576 acres of project lands surrounding Lake Sacajawea. These lands include fee lands that are federally-owned and managed by the Corps, as well as easement lands to which the Corps has specific rights or easements (i.e., flowage or access). There are 3,517.3 acres of Corps-managed lands that are utilized for public recreation purposes, wildlife habitat, wildlife mitigation, and water- connected industrial development. At the present time, no lands are licensed to state or local park agencies. Public boat launching facilities are available at six locations along the shoreline.

LOCAL COOPERATION: None required.

PROGRESS: Construction of the Ice Harbor Project began in December 1955, and the project began operation in December 1961. Powerhouse units 4 though 6 were installed, with all units producing power by January 1976. The entire project, including recreational facilities, is now complete.

COST: Total expenditures through September 1996 are $168,029,357 for new work (including $36,748,021 for additional units) and $127,558,006 for operation and maintenance. In addition, local interests contributed 82,500 toward an artificial spawning channel.

Ice Harbor Lock and Dam--Lake Sacajawea, Structural Details
(150 dpi) (75 dpi)