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<br />C? <br /> <br />,''''.1 <br /> <br />!-\ <br />Ul <br />(:~) <br />W <br /> <br />'\ <br /> <br />thickness and braced by massive buttresseso The semi-circular <br /> <br />arched, end walls are, however, only 3~ feet in thicknesso This <br /> <br />'''' <br /> <br />type of construction was found to be the most economical to withstand <br /> <br />the tremendous pressures of the earth f~ll and reservoir surrounding <br /> <br />the building and still provide a workable arrangement in the pl~nto <br /> <br />To describe the installations, it will be best to start <br /> <br /> <br />at the top of the building and travel downo On the highest floor at <br /> <br />elevation 8315 may be found the hoisting apparatus for the elevatOr <br /> <br />which cierves the entire buildingo On the floor below at elevation 8301 <br /> <br />but still above the ground, can be found the station service control <br /> <br />room, the battery room, and a room containing part of the ventilation <br /> <br />fans and heaterso Next is the main floor, which is at the same elevation <br /> <br />as the ground outside the buildingo Here one finds the main control <br /> <br /> <br />. <br /> <br />room, the machine shop, a SO-ton traveling crane, tool rooms, first <br /> <br />aid room and the lavatorieso Hatchways (openings in the floor covered <br /> <br />with removable steel covers) through all of the floors enable the <br /> <br />traveling cranes to move machinery to any level in the buildingo The <br /> <br />6 <br />