In-Situ Shear Strength Testingby Richard R. Potts, New York State Electric and Gas Corp, United States,
Harbinder S. Gill, New York State Electric and Gas Corp, United States,
Gary W. Page, New York State Electric and Gas Corp, United States,
Document Type: Proceeding Paper
Part of: Waterpower '89
Dam stabilization requirements at the Upper Mechanicville Hydroelectric Project on the Hudson River in New York were significantly modified based on the results of an in-situ direct shear testing program. Design of the dam modifications was initiated in 1987 to install flap gates on the dam crest and to stabilize the structure in accordance with Federal Energy Regulatory Commission (FERC) Guidelines. The cohesion and friction at the interface of the new concrete rollway and the bedrock were critical to evaluating the dam stability. In discussions with the FERC, it was agreed that a shear strength testing program would be implemented at the site during construction to finalize anchoring requirements. As a result of this program, actual values of cohesion and friction were determined and used in the design to ensure that the dam was reliably stabilized to the satisfaction of all concerned parties.
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