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, r ~. I (. .I.. t. (' ..- .....;...) CONSTRUCTION UTILITIES '. 127 Main line storage is provided by fOllr steel tanks and six reser- voirs, each of 300,000-gallon capacity, The tanks are 42 feet in diameter and 29 feet high. The reservoirs are embankment type.. , gunite lined, of circular shape with top and bottom diameters of 88 and 40 feet, respectively, and 15 feet deep. Their roof framing and sheathing are of redwood. The reservoirs and tanks in some cases float on the line; others act as storage between well pumps and main-line booster pumps. Auxiliary storage is obtained in the well tanks and the booster station tanks, consisting of two 100,000- gallon, thirteen 65,000-gallon, and two 21,500-gallon tanks. Construction period The first demand for water was in the Coachella division where camps to start tunnel driving had been established at Fargo and Thousand Palms canyons in January 1933, followed immediately by the opening of four more Coachella camps. By the end of 1933 eighteen tunnel camps altogether were in operation in the desert section, and the headquarters camps of Division 1 and Division 3 had been established. In the early period of operation temporary gasoline-driven deep- well and booster ]HttllpS were used. As electric energy became available these were changed over to electric power drive auto- matically controlled. In this way water was made available along the various sections of the system on the following dates: Big Mnrong:o (0 Benlno C.llllp . ..................ApriJ a, J933 Buried !\foulltain to Fargo Camp... .................. .....April 22, lq33 Bllrierll\foulllnin 10 West Iron Mountain .. .............nnn...m__ nom.JUlle 30, 1933 Sand Draw (0 F.a~t Iron Mountain.... n... .................n___._____ .......m..Jul}' 3, 19.33 S,lnd Drnw to Earp ,_.... ......................... ....Aug:. 25. 19.3.3 Eureka 'Wash 10 Copper Basin. .......___m..._____...___.. ........SCpl. 29. 19.13 The demand increased gradually, but completion of virtually the entire main system during the first year was necessary to supply the widely-scattered tunnel and division headquarters camps and transmission line substations. The permanent installation, includ- ing all pipe lines, reservoirs, tanks, deep-well pumps, booster pumps, pump houses, and automatic-control apparatus was in op- eration by December 25, 1933. Water service District service extends only to the main-line outlet at which the user makes connection with the system. From this poiut all storage tanks, pipe lines, and pumps, if required, are installed by the user.