Repair of The Hinckley Dam Embankments

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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 | Soil liquefaction | Rehabilitation | Cohesionless soils | Dam safety | Soil stabilization | Strength of materials | Hydro power | North America | United States | New York

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