California’s San Diego County Water Authority is launching the fourth and final phase of its $1-billion Emergency Storage Project, which will provide a six-month supply of locally stored water to protect against disruption of its supply by earthquake or drought. Up to 90% of the county’s supply travels hundreds of miles from northern California and the Colorado River. MWH, Broomfield, Colo., is designing the $500-million project to raise San Vicente Dam from 220 ft to 337 ft with roller-compacted concrete. Another joint venture of Parsons Corp. and Black & Veatch has won a contract for design and constructibility reviews and construction management. Construction will begin in late 2009. The owner says it is the largest RCC dam raise in the world.
California’s San Vicente Dam To Be Raised 117 Ft
September 17, 2008