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Design of Penstocks in Severe Earth Slide Locations

by Norman L. Scott, STS HydroPower Ltd, Lansing, United States,



Document Type: Proceeding Paper

Part of: Waterpower '91: A New View of Hydro Resources

Abstract:

This paper deals with the problems of locating a penstock for a small hydroelectric plant at a site in Northern California that experiences considerable land movement during the rainy winter months of the year. A 40-inch diameter penstock for the Kekawaka Hydroelectric Project was constructed across several active landslide areas. The rate of movement of these slides varied from less than an inch to over 3 feet per year. Several penstock design options were explored and the advantages and disadvantages of each are examined. The performance results of the penstock over the first winter of operation are compared with the original design concept and expectations.

Subject Headings: Conduits | Hydro power | Landslides | Winter | Rainfall | Power plants | Soil stabilization | California | United States

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