National Program for Inspection of Non-Federal Dams, Kenmere Reservoir Dam (CT-00251), Lower Connecticut River Basin, Berlin Connecticut. Phase I Inspection Report

摘要

The dam and dike are judged to be in poor condition. The crest of the dam is in poor condition with large vehicle ruts. A deep hole on the crest was observed in the vicinity of the service bridge. No movement or settlement of the crest was indicated and the vertical and horizontal alignment was generally good. The riprap on the upstream face has many gaps leaving the embankment unprotected. Numerous tree stumps were observed on the upstream face. The slopes are extensively overgrown with brush, grass and large trees. The downstream slope has an undulating surface in many locations. A considerable wet area is located along the downstream toe. Numerous small streams were noted carrying water from seeps eminating on the downstream face. The spillway is in very poor condition. The dike's upstream face is unprotected. Extensive vegetation and stumps exist on the upstream and downstream slopes. A large erosion gully approximately four feet deep has formed on the downstream slope. Seepage is evident along the majority of the downstream toe. A small scarp was observed along the downstream toe probably due to continued seepage. A small boil was observed approximately 20 feet downstream of the toe. The capacity of the spillway is inadequate to pass the one half PMF test flood outflow of 3206 CFS without overtopping the dam and dike. The test flood would overtop the dam by about 0.2 feet. The spillway is adequate to pass about 84 percent of the test flood outflow without overtopping the dam and dike.