Repair of The Hinckley Dam Embankments

by Michael F. Nash, New York Power Authority, White, Plains, NY, USA,



Document Type: Proceeding Paper

Part of: Water Power '87

Abstract:

The New York Power Authority was licensed in 1982 to construct and operate a 9 Mw hydroelectric facility at the existing Hinckley Dam near Utica, New York. Soil exploration programs undertaken to determine whether the dam embankments met modern safety criteria revealed the presence of loose, cohesionless soils. Since such materials may be subject to a sudden loss of shear strength, or liquefaction, during earthquakes, additional studies were undertaken to develop the appropriate repair design. This paper discusses the exploration programs to determine embankment soil properties, consultant evaluations of these properties as related to dam safety, final conclusions regarding liquefaction stability, and repair design selection.

Subject Headings: Embankment dams | Cohesionless soils | Soil liquefaction | Soil properties | Soil stabilization | Rehabilitation | Dam safety | New York | United States

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