Cabin Creek Pumped Storage Hydroelectric Project

The Project consists of two reservoirs with a maximum head differential of 1,226 kw pump-turbine units. The upper reservoir is formed by a 210 ft high rock fill dam with a concrete facing with crest 11,202 ft above sea level. The dam at the lower reservoir is a combination earth and rock fill dam 95 ft high with sloping impervious core and upstream blanket. Geologic foundation conditions at each dam are described along with cross sections, elevations and outlines of construction specifications. The service requirements for dams for pumped storage projects are much more severe than most dams because of rapid daily drawdown and refill. The dams were monitored during and following construction. Records of deflection, settlement and seepage measurements are presented. In addition, some of the miscellaneous project features including erosion control, icing, and some of the project problems and solutions are described.