Dam Rehabilitation and Fish Lift Design at the Pejepscot Hydroelectric Project

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by Michael F. Dumont, Acres Intl Corp, United States,
Allen G. Corwin, Acres Intl Corp, United States,
Peter S. Foote, Acres Intl Corp, United States,

Document Type: Proceeding Paper

Part of: Waterpower '89:

Abstract: The rehabilitation work on the existing rockfilled timber crib dam comprised an assessment of the existing dam stability; analysis of the existing hydraulic conditions to establish the reasons for repeated flood damage to the existing concrete apron slab; and development of a revised design for the dam which would allow an increase in the permanent crest level of two feet. In addition, five hydraulically-operated steel crest gates 96 feet long and 3 feet high were installed to increase the available gross head from 21 feet to 24 feet without impacting upstream flood levels. The Pejepscot fish lift was designed to handle a maximum capacity of 3,400 American shad per hour, using a conventional braille and hopper arrangement.

Subject Headings: Earthfill dams | Concrete dams | Hydro power | Rehabilitation | Rockfill dams | Rock fills | Wood | Hydraulic design |

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