Italy
The Terror Lake Hydroelectric Generating Station is the principal power plant for Kodiak Island, Alaska. The Hydroelectricity station consists of three Pelton runner vertical shaft turbine units rated 11 megawatts each at 1200 feet head. Two units were installed when the station was constructed in 1
985, and the third unit rated 11.5 MW was installed in the fall of 2013. The station is owned and operated by the Kodiak Electric Association, Inc., an electrical cooperative owned by its customers. The station is located about 25 miles from the city of Kodiak and is accessible only by air or boat. The Terror Lake main dam is 2100 feet long and 156 feet high and is a rockfill dam faced with concrete. A spillway with a 600-foot crest is adjacent to the north side of the dam. The lake acts as a reservoir with a surface area of 850 acres. It can store 78,000 acre-feet of water at a lake surface elevation of 1383 feet. The power tunnel is 10 feet in diameter and extends 26,300 feet from the dam to the penstock, from an inlet 143 feet below the nominal surface of the lake. The penstock that connects the power tunnel to the powerhouse is steel-lined and runs for 3,400 feet, varying from 56 to...
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