National Dam Safety Program. Erieville Reservoir Dam (Inventory Number NY 369), Oswego River Basin, Madison County, New York, Phase I Inspection Report

摘要

This report provides information and analysis on the physical condition of the dam as of the report date. Information and analysis are based on visual inspection of the dam by the performing organization. Inspection of this dam revealed that there are a number of deficiencies on this structure some of which are rather serious. Further analysis is required to evaluate and remedy these deficiencies. The most serious of these deficiencies are the two areas of seepage on the downstream slope of the northern section of the dam. The hydrologic/hydraulic analyses performed indicate that the outflows from the Probable Maximum Flood (PMF) will result in the dam being overtopped. The outflows from one-half of the PMF will not result in the dam being overtopped. Therefore, the spillway capacity is rated as inadequate. However, since the outflows from one half the PMF will result in flow around the southwestern end of the embankment, further investigation is required to determine the effects of this condition. The valves for the service spillway pipes are located at the downstream end of the two pipes. This is an undesirable situation since the pipes are constantly subjected to a pressure head. The existing valves should be removed and replaced by valves at the upstream end of the pipes.