Rehabilitating Small Earth Embankments with RCCby Eric J. Ditchey, O'Brien & Gere Engineers, Inc, Blue Bell, United States,
Abstract: The rehabilitation of existing earth dams using roller compacted concrete (RCC) is gaining wider acceptance in the engineering and construction community. Presented herein is a discussion of three earth dam rehabilitation projects using RCC: White Meadow Lake Dam, Philipsburg Dam No. 3 and Lake Lenape Dam. Investigations of these dams revealed a variety of problems; however, all three dams required overtopping erosion protection due to existing spillways with inadequate capacity to pass the current design floods. The design of rehabilitative measures for all three projects was performed at nearly the same time. A single laboratory mix design program was developed and carried out, with the resulting RCC mix used for each project. The discussion of each dam will include a project description, the identified deficiencies, the various remedial alternatives that were evaluated, site specific RCC details, and a description of the construction of Lake Lenape Dam.
Subject Headings: Earthfill dams | Concrete dams | Rehabilitation | Lakes | Roller-compacted concrete | Compaction (material) | Compacted soils | North America | United States | New Jersey | Pennsylvania
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