National Dam Safety Program Von Der Ahe Dam Mo 31077 Mississippi Kaskaskia St Louis Basin Franklin County Missouri Phase I Inspection Report

Download or read book National Dam Safety Program. Von Der Ahe Dam (MO 31077), Mississippi - Kaskaskia - St. Louis Basin, Franklin County, Missouri. Phase I Inspection Report written by Dave Daniels and published by . This book was released on 1980 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Von Der Ahe Dam is an earthfill structure approximately 37 ft. high and 660 ft. long at the crest. The appurtenant works consist of an 18-inch diameter concrete pipe at east abutment, a 24-inch diameter steel primary spillway pipe at Sta. 4 + 82 and a 9-inch diameter steel drawdown pipe at Sta. 4 + 95. Our inspection and evaluation indicates that the combined spillways do not meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. The combined spillways will pass 33 percent of the Probable Maximum Flood without overtopping. The embankment appeared to be generally in good condition. Deficiencies visually observed by the inspection team were: (1) Erosion of downstream face at toe of embankment; (2) Erosion of upstream face of dam at elevation of primary spillway inlet; (3) Lack of trash rack on the primary spillway inlet; and (4) Apparent seepage through bedrock in the east abutment; and (5) Seepage through drain pipe valve.