US Army Corps of Engineers
Northwestern Division Website

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Corps begins spring fish operations

Published April 4, 2016
This congressionally authorized project consists of Ice Harbor Dam, powerhouse, navigation lock, two fish ladders, a removable spillway weir and a juvenile fish bypass facility. It provides navigation, hydroelectric generation, recreation and incidental irrigation.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 is a concrete gravity type dam, with an earthfill embankment section at the north abutment. It includes a navigation lock with clear dimensions of 86 by 675 feet. The dam has a 10-bay spillway that is 590 feet long and includes ten 50 foot tainter gates.

This congressionally authorized project consists of Ice Harbor Dam, powerhouse, navigation lock, two fish ladders, a removable spillway weir and a juvenile fish bypass facility. It provides navigation, hydroelectric generation, recreation and incidental irrigation.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 is a concrete gravity type dam, with an earthfill embankment section at the north abutment. It includes a navigation lock with clear dimensions of 86 by 675 feet. The dam has a 10-bay spillway that is 590 feet long and includes ten 50 foot tainter gates.

Portland, Ore. — On April 3, the U.S. Army Corps of Engineers (Corps) began implementing its 2016 Fish Operations Plan (FOP) at the four lower Snake River dams. The annual plan, prepared by the Corps, is coordinated with states, Tribes, and other federal agencies in the region. The 2016 plan includes operations for spring and summer fish passage seasons, utilizing tools such as spill, river flow and water level adjustments, and operations for the transportation of juvenile fish from Lower Granite, Little Goose, and Lower Monumental dams.

As specified in NOAA Fisheries’ 2014 Supplemental Biological Opinion (BiOp), the 2016 FOP calls for spill to begin at the lower Snake River dams April 3 and at the lower Columbia River dams on April 10.

"Spill in combination with fish passage improvements made at the dams have been effective tools for providing safe juvenile fish passage at the mainstem hydroelectric projects," said Rock Peters, senior program manager for the Corps’ Northwestern Division. He added, “The Corps of Engineers remains committed to operating the Federal Columbia River Power System (FCRPS) dams and reservoirs to meet their authorized project purposes and meet responsibilities under the ESA and BiOp for adult and juvenile fish passage.”

The most recent water supply forecast issued by the Northwest River Forecast Center for the Columbia River Basin (Apr–Aug) is 102 percent of normal as measured at The Dalles Dam and 100 percent of normal for the Snake River Basin, (Apr–Jul), as measured at Lower Granite Dam.

For more information on federal salmon and steelhead recovery efforts in the region, visit www.salmonrecovery.gov


Contact
Michael Coffey
503-808-3722
michael.a.coffey@usace.army.mil

Release no. 20160404-001