File:Seattle and the Orient (1900) (14804990423).jpg

Identifier: seattleorient00bowe (find matches)
Title: Seattle and the Orient
Year: 1900 (1900s)
Authors: Bowen, Alfred D
Subjects:
Publisher: Seattle, Wash. : Times Print. Co.
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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ndwhich on account of its long crest willnot cause backing up of flood waters,and at the same time will raise thelevel of tJhe river at the intake six feetand permit of a better inflow, andequalize the daily flow of water dur-ing the period of extreme low water. Returning again to the shaft, intowhich the waters have been diverted:A steel penstock seven and one-halffeet in diameter rises through the ex-cavation into the bottom of the intake,the top or expansion joint of which ismade tight with the rock walls of theshaft, so that a water tight roof is af-forded to the shaft, leaving the onlyescape for the water down through thepenstock. A steel bulkhead 8x10 feet,rises beside the penstock and behindthe center pier, and this bulkhead, sur-mounted by a neat little house, is thefront door of the subterranean powerhouse. Through it the elevator travelsfor the convenience of the operation ofthe works, and through it the electricalconductors descend. The penstock SEATTLI-: AND THE ORIENT. 39
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The Snoqualmie Power Co. 40 SEATTLE AND THE ORIENT. descends 250 feet until the cavity isreached, where it makes a right angleturn to the horizontal position and en-larges to a diameter of ten feet, reduc-ing again to eight feet at the middlesection, which horizontal constructionis known as the receiver. The receiv-er and lower half of the penstock aremade of rolled steel eignt-foot plates,one inch thick. The upper half of thepenstock is made of half-inch plates.The whole construction is calked bot-tle tight. The receiver lies upon arock bench left in the cavity along itsnorth margin, twelve feet above thefloor. The penstock and receiver weigh450,000 pounds, and the water columnin the penstock weighs 340.000 tons—in other words, the 340,000 tons of wa-ter which the penstock holds is whatfurnishes 12,000 horse power of elec-tric energj that the company are nowfurnishing to consumers. The shaftwas made large enough for two pen-stocks in view of doubling the capacitybesides leaving roo

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