National Dam Safety Program. Port Perry Dam (MO 30030), Upper Mississippi - Mississippi - Kaskaskia - St. Louis Basin, Perry County, Missouri. Phase I Inspection Report

摘要

This dam is in the high hazard potential classification, which means that loss of life and appreciable property loss could occur in the event of failure of the dam. The spillway of Port Perry does not meet the criteria set forth in the guidelines for a dam having this size and hazard potential. Port Perry is an intermediate size dam with a high hazard potential, required by the guidelines to pass the PMF. Considering the high hazard potential to loss of life and property downstream of the dam, the outlet facilities of Port Perry Dam should be able to pass the PMF without overtopping the dam. However, it was determined that the spillway will only pass approximately 50 percent of the PMF without overtopping the dam. The evaluation of Port Perry also indicated that the spillway will pass the 100-year flood. Faults were observed in the right abutment. Their location could be considered to be a deficiency. The effect of the faults on the stability of the dam should be assessed by an engineer experienced in the design and construction of dams.