Corps taking comments on Fern Ridge Lake plan.Byline: The Register-Guard The U.S. Army Corps of Engineers is taking public comments on its plan to keep Fern Ridge Lake lower than normal for a year or longer because of a problem at the dam. The plan is intended to help the agency investigate and repair the 62-year-old dam's failing internal drain system. But the lower water level may have a negative effect on wetland and aquatic species, wetland habitat and sailboating, corps officials say. The agency proposes to stop filling the reservoir when the water level reaches 371 feet above sea level. That's 2 1/2 feet below "full conservation pool." The restriction will remain in effect until further investigations show more favorable fa·vor·a·ble adj. 1. Advantageous; helpful: favorable winds. 2. Encouraging; propitious: a favorable diagnosis. 3. conditions exist, downstream slope stability The field of slope stability encompasses the analysis of static and dynamic stability of slopes of earth and rock-fill dams, slopes of other types of embankments, excavated slopes, and natural slopes in soil and soft rock. is improved or permanent repairs are completed. Repairs are contingent on Adj. 1. contingent on - determined by conditions or circumstances that follow; "arms sales contingent on the approval of congress" contingent upon, dependant on, dependant upon, dependent on, dependent upon, depending on, contingent congressional funding. At 371-foot elevation elevation, vertical distance from a datum plane, usually mean sea level to a point above the earth. Often used synonymously with altitude, elevation is the height on the earth's surface and altitude, the height in space above the surface. , boat ramps at Fern Ridge could be used up until late summer, project manager Mark Dasso said. Also, reservoir depths in late summer probably would not allow for deep-draft sailboats to tie up at the marinas, Dasso said. Comments on the corps' environmental assessment of its lower water level plan are due by Dec. 15. Send comments to Fern Ridge Dam Repair Interim Operation, District Engineer, U.S. Army Corps of Engineers, P.O. Box 2946, Portland, OR 97208. E-mail comments to lynne.d.hamilton@usace.army.mil An Internet address domain name for a military agency. See Internet address. (networking) mil - The top-level domain for entities affiliated with US armed forces. . |
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