Transcription of CHAPTER VII. Design-POWER WATERWAYS
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CHAPTER VII. Design-POWER WATERWAYS
CHAPTER VII. Design-POWER WATERWAYS 54. LOCATING PENSTOCKS. (a) 15-foot-diameter steel penstocks for delivering water to the turbines in the powerplant are embedded in the dam (figs. 129 and 130). The centerline of each penstock intake is at elevation 3470 which is about 45 feet above estimated silt elevation after 150 years of reservoir operation. The minimum water surface for power operation is elevation 3490. A by fixed-wheel hydraulically operated closure gate which can operate under unbalanced head was provided at the upstream face of the dam for each penstock. An unlined transiton section from rectangular to round was provided at the entrances of the penstocks for a smooth increase in flow velocity and to reduce the width required for each closure gate (fig.)
CHAPTER VII. Design-POWER WATERWAYS 54. LOCATING PENSTOCKS. (a) General.-Eight 15-foot-diameter steel penstocks for delivering water to the turbines in the powerplant are embedded in the
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