National Dam Safety Program. Cedar Hill Lake Number 2 and Number 3 Dams (MO 30005) and (MO 31020), Mississippi - Kaskaskia - St. Louis Basin, Jefferson County, Missouri. Phase I Inspection Report.
Abstract
Based on the criteria in the guidelines, the dams are in the high hazard potential classification, which means that loss of life and appreciable property loss could occur in the event of failure. Our inspection and evaluation indicates that the spillway of Cedar Hill Lake No. 2 and No. 3 Dams meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. These dams are small size dams with a high hazard potential required by the guidelines to pass from one-half of the Probable Maximum Flood to the Probable Maximum Flood without overtopping. Considering the small volume of water impounded, and the large floodplain downstream, one-half of the PMF is the appropriate Spillway Design Flood (SDF). It was determined that the spillways will pass 55 percent of the Probable Maximum Flood without overtopping the dam. Our evaluation indicates that the spillways will pass the 100-year flood; that is, a flood having a 1 percent chance of being equalled or exceeded during any given year.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1979
- Accession Number
- ADA104782
Entities
People
- Walter G. Shifrin