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upr000036 167

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upr000036-167
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    This material is made available to facilitate private study, scholarship, or research. It may be protected by copyright, trademark, privacy, publicity rights, or other interests not owned by UNLV. Users are responsible for determining whether permissions are necessary from rights owners for any intended use and for obtaining all required permissions. Acknowledgement of the UNLV University Libraries is requested. For more information, please see the UNLV Special Collections policies on reproduction and use (https://www.library.unlv.edu/speccol/research_and_services/reproductions) or contact us at special.collections@unlv.edu.

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    University of Nevada, Las Vegas. Libraries

    WATER TREATMENT PLABT. The Water Treatment Plant consists of the following principal units: fee Reaction Tanks, Chemical Feed Equipment, Sight Rapid Sand Filters, Four Zeolite Softeners, Chlorination Equipment, Two Clear Wells, Building, Reaction Tanks are of the up-flow variety, using Dorr Hydrotreator Equip­ment, The tanks are 6$ feet square, with a 1% foot side water depth. Retention at maximum flow Is approximately one hour. The reaction tanks are Identical and operate in parallel. The Rapid Sand Filters consist of eight separate units, with a total sur­face area, of 5#080 square feet and a three foot sand depth. The design maximum rate or application Is three gallons per square foot per minute, the back-wash rate is fifteen gallons per square foot per minute. She plant does not have a back-wash tower, back-wash water being pumped direct from the filtered water clear well through the filters. W&stewash water is reclaimed and pumped back through the reaction tanks. Water to be Zeolite softened Is conveyed directly from the filter overflow to four Zeolite cells. The total firfaoe area of the Zeolite beds is 528 square feet, with a media depth of four feet. synthetic Zeolite is used. Zeolite treated water overflows to the smaller of the two clear wells. For the domestic water supply, filtered water and Zeolite treated water are blended to the desired hardness by an automatic tempering valve. *hree small booster pumps are used to raise the pressure in the domestic water distribution system. All water is chlorinated after treatment, the chlorine being applied at each of the clear wells, which provide a brief contact period before tne water is discharged to the distribution mains. The entire plant, including building, tanks and clear wells, is of reinforced concrete construction. It is completely fireproof and of excellent design. ELECTRICAL TRANSMISSION & COHTRQL LINES Electrical Transmission and Control Lines consist of %eotrlo Transmission Line, Telephone Control System and Transformer Bank, The electrical trans­mission line to the Booster Pump Station is 69 kv, is 62,770 feet long with 100 structures, and with 2/07~strand copper cables. From the transformer bank at the Booster Pump Station to the Intake control house Is 2,3 miles of 30© m.c.m., 5 kv. Parkway Cable laid under ground. The telephone con­trol oable has an approximate total length of 8^,000 feet with #38 poles ranging from 25 to 75 feet In lingth. The cable is 6-pair, pulp Insulated, 19 gauge, non-ooated 3$ lead sheath. The transformer bank at the Booster Pump Station has been described under •Booster Pump Station Equipment*. 5