Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

Remedial work on the Saluda Dam will entail excavation at the toe to depths of over 50 ft. Excavation at the toe of a large high hazard dam is an unusual event. Although statically stable the Dam doesn’t meet modern standards for dynamic stability. Based on the assessment of liquefaction potential, the dam requires remediation. The downstream hazard entails consequences of failure of potential loss of life. Due to such consequence, the Regulator called for renovation of Saluda Dam. Engineers evaluated several remedial alternatives. The chosen alternative entails excavation at the toe for construction of new RCC and Rockfill Berms. Excavation at the toe of so large a dam, impounding so large a lake is a dangerous undertaking. It would be a daunting task even if there were no downstream hazard. The hazard and consequences of failure in this case make it much more so. The consequences of failure demand a high factor of safety. The excavation concept entails powerful questions: How can it be done assuring safety? What factor of safety is sufficient considering consequences of failure? Are there not alternatives to excavation that will effect seismic stability?

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Apr 13th, 12:00 AM Apr 17th, 12:00 AM

A Dangerous Place to Dig Excavation at the Toe of Saluda Dam

New York, New York

Remedial work on the Saluda Dam will entail excavation at the toe to depths of over 50 ft. Excavation at the toe of a large high hazard dam is an unusual event. Although statically stable the Dam doesn’t meet modern standards for dynamic stability. Based on the assessment of liquefaction potential, the dam requires remediation. The downstream hazard entails consequences of failure of potential loss of life. Due to such consequence, the Regulator called for renovation of Saluda Dam. Engineers evaluated several remedial alternatives. The chosen alternative entails excavation at the toe for construction of new RCC and Rockfill Berms. Excavation at the toe of so large a dam, impounding so large a lake is a dangerous undertaking. It would be a daunting task even if there were no downstream hazard. The hazard and consequences of failure in this case make it much more so. The consequences of failure demand a high factor of safety. The excavation concept entails powerful questions: How can it be done assuring safety? What factor of safety is sufficient considering consequences of failure? Are there not alternatives to excavation that will effect seismic stability?