The Dalles Dam and the 800 foot long spillwall completed in 2010 to direct juvenile fish passing over the dam into the safety of the deep main channel, away from predators. (USCG and USACE)
The Dalles Dam 800 foot long spillwall as seen from the dam. (USFWS)
The U.S. Fish and Wildlife Service (Service) has a responsibility for all public and treaty tribal trust species, as do all federal agencies, but the Service is particularly interested in improving the fate and survival of bull trout and Pacific lamprey as they migrate in the mainstem. The 2012 Annual AFEP Review just concluded on November 29 after three days and over 35 research presentations. The research presentations were divided into seven categories; estuary studies, avian and pinniped (bird and sea lion) predation studies, adult fish passage and survival studies (includes bull trout), juvenile fish passage and survival studies, system survival studies, transportation studies, and lamprey studies. The 2012 research presentations may be viewed at: http://www.nwd-wc.usace.army.mil/tmt/documents/AFEP/. The Service has been pleased to be a partner in the AFEP process for many years, not only as an active participant in the discussions for study needs, their development and review, but also as a research partner in the field studying bull trout use, movement and passage in the mainstem Columbia and Snake Rivers.
Adult fish ladder at Lower Granite Dam. (USFWS)
Spill for juvenile fish passage at McNary Dam. Surface top spill weirs are in place in spillbays 19 and 20 (3rd and 4th bays from the right). (USFWS)