Overview After 17 years and 330 miles, the waters of Lake Havasu were delivered to the City of Tucson, AZ. At the end of this journey lies the Snyder Hill and Black Mountain Pumping Plants. The combined capacity of these two plants is nearly 37,000 cubic feet of water per minute.

The nucleus of the project is a 121kV SF6 insulated switchgear assembly, which utilizes state of the art power circuit breaker technology to provide what one engineer described as a “switchyard on a postage stamp”. This equipment was supplied by MITSUBISHI WORKS of JAPAN in a joint venture with WESTINGHOUSE ELECTRIC CORP.

Details The electrical subcontract work required installation of 3 each 115kV 20MVA power transformers, SF6 gas insulated switchgear with 3 bays of gas breakers, disconnect switches and gas bus, 115kV circuit switchers, 8000 feet of 115kV underground power cable, outdoor metal-clad switchgear, duplex control switchboards, 15kV non-segregated phase bus, 7200V motor control equipment, and interior lighting, and power distribution systems.