EntrapmentMonitoring at an Arctic Seawater Intake

by William M. Blaylock, Dames & Moore, Seattle, WA, USA,
Jonathan P. Houghton, Dames & Moore, Seattle, WA, USA,
Scott B. Robertson, Dames & Moore, Seattle, WA, USA,

Document Type: Proceeding Paper

Part of: Coastal Zone '87


This paper presents the results of a monitoring program designed to quantify the level of fish entrapment during a seawater treatment plant (STP) operation as well as immediate and delayed effects on fish from passage through the fish diversion system. The entrapment monitoring was a portion of a larger monitoring program conducted between June 1984 and September 1985 that also considered impingment and entrainment of marine life at the STP. Engineering aspects of the diversion system designed to minimize entrapment impacts, including intake design and intake flow velocity, are discussed. Several biological sampling techniques were used for intake monitoring, including use of an in-plant fish collector system, visual observations of fish behavior within the intake structure, and deployment of fyke and gill nets in the source water.

Subject Headings: Sea water | Structural behavior | Salt water | Water treatment plants | Water intakes | Fish management | Entrainment | Lifeline systems | Arctic | Alaska | United States

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