Santa Cruz Dam Modificationby Megan Metcalf, Bureau of Reclamation, Denver, United States,
Timothy P. Dolen, Bureau of Reclamation, Denver, United States,
Paul A. Hendricks, Bureau of Reclamation, Denver, United States,
Abstract: Santa Cruz Dam was the first concrete arch dam in the United States to be modified using an roller compacted concrete (RCC) buttress. Innovative techniques included forming the stepped conventional concrete facing on the spillway, using an inflatable 'balloon' to speed construction of the drainage/access gallery, and adding an air-entraining admixture to the RCC for freeze-thaw protection. Dam modification began in May 1989 and ended in June 1990 at a cost of $8.4 million (US).
Subject Headings: Concrete dams | Concrete admixtures | Dams | Roller-compacted concrete | Arch dams | Compaction (material) | Concrete construction | Spillways | Innovation | North America | United States
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