Design and Construction of Terror Lake Dam

by Michael Morris,

Document Type: Proceeding Paper

Part of: Concrete Face Rockfill Dams—Design, Construction, and Performance


Terror Lake Dam is a central feature of the 189 million Terror Lake Hydroelectric Project, located on Kodiak Island Alaska. The dam is a 193-feet (59 m) high concrete-faced zoned rockfill structure which provides storage and regulation of runoff in the Terror River and adjacent streams by raising the natural level of Terror Lake. The available materials for dam construction at the site led to the selection of a rockfill dam with an impervious upstream facing. Contract award was for the low bid for the cement concrete alternative. A description is given of static and dynamic analyses of the dam by a finite element model in order to evaluate safety against major slippage and excessive crest settlement during earthquakes (DBE and OBE) developed for the site. The paper discusses the construction schedule and other aspects of the construction work.

Subject Headings: Infrastructure construction | Lakes | Rockfill dams | Dams | Finite element method | Concrete dams | Embankment dams | Rivers and streams | Alaska | United States

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