Cedar Falls Project—Major Rehabilitationby William L. Freitas, Seattle City Light, USA,
Robert S. Sato, Seattle City Light, USA,
Abstract: This paper presents planning objectives and operational considerations which governed the design and construction of a major rehabilitation project implemented at the City of Seattle's water supply and hydroelectric power dam and reservoir at Cedar Falls. Located on the Cedar River about 40 miles southeast of Seattle, Washington, the project includes a timber crib dam and downstream cyclopean masonry concrete dam. Combining the long-range water and power resource management objectives and the safety improvement requirements, interim rehabilitation work underway includes: replacing the crib dam with a roller compacted concrete (RCC) overflow dam; modifying the masonry dam by constructing a new gated emergency spillway, adding a gate and renovating the existing service spillway, resurfacing the upstream face, and adding a remote control system for project operation from Seattle.
Subject Headings: Concrete dams | Hydro power | Rehabilitation | Spillways | Water resources | Resource management | Water supply | Rivers and streams | Washington | North America | United States | Seattle
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