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RCC Technical Seminar and Site Tour RCC for Dams and Dam Rehabilitation April 25-26, 2007 Overview  There
are over 79,000 dams on the National Inventory of Dams. In less than
20 years over 40% will be over 50 years old. In addition, dams, once
located in rural areas, are experiencing development downstream changing
the dam’s hazard classification and therefore spillway design
criteria. The engineering community is challenged with developing
economical solutions that provide the appropriate level of protection
to the public.
Roller compacted concrete is increasingly being used to rehabilitate existing dams because it can fulfill the engineer’s design criteria requirement; satisfy the owner’s demands of an economical solution; and meet the dam safety regulator’s mandate that public safety not be compromised. RCC is used to provide additional spillway capacity to earthfill dams, improve stability of existing concrete and masonry dams, and provide erosion control at the spillway outlet works. For new dam construction, RCC has found a home for gravity dams and for emergency spillways. Size is not an obstacle to the economy of RCC gravity dams. RCC volumes for dam projects have ranged from less than 2000 to 1.4 million cubic yards. In Georgia there have been five RCC gravity dams completed, three overtopping spillways, and one masonry dam buttressed with RCC. In addition, Hickory Log Dam is a 180-foot high water supply dam currently under construction in Canton, GA, and two additional overtopping protection projects are scheduled for construction in 2007 in Gwinnett County. For more information contact: Fares Abdo, P.E.
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