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Design of Seepage Control Systems for RCC Dams

by William A. Moler, Morrison-Knudsen Engineers Inc, Denver, CO, USA,
James F. Moore, Morrison-Knudsen Engineers Inc, Denver, CO, USA,



Document Type: Proceeding Paper

Part of: Roller Compacted Concrete II

Abstract:

As the reservoirs of the first generation of roller compacted concrete (RCC) dams have been filled, several have exhibited significant amounts of seepage, a fact that has been of concern to prospective dam owners. The key to proper dam design is a combination of seepage reduction and seepage collection to safely and economically meet the operating requirements of the project. The majority of the RCC projects constructed to date around the world have been for flood control, seasonal storage, or irrigation, where seepage loss has not been a major concern. As the next generation of higher, multi-purpose RCC dams are designed and constructed, the necessity for water tightness will be increased. This paper describes the nature of seepage through RCC dams, the seepage control measures that have been implemented to date, and summarizes their performance.

Subject Headings: Concrete dams | Seepage | Roller-compacted concrete | Control systems | Hydraulic design | Compaction (material) | Water leakage and water loss

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