Detailed Project Report and Environmental Assessment. Section 14 Emergency Streambank Protection: Turkey River, Clayton County Road C1X, Elkader, Iowa
Abstract
This report addresses the problem of streambank erosion of the right descending bank of the Turkey River paralleling County Road C1X, located at the northwest edge of the city limits of Elkader. The study area involves approximately 250 linear feet of the Turkey River bankline which has severely eroded and is presently threatening the integrity of the roadway. A site investigation was made to determine the severity of erosion along County Road C1X. The road is a major access route to the city from the west. This Detailed Project Report recommends clearing the bankline and placing approximately 3,000 tons of Iowa Class D riprap to provide a 2:H on 1:V slope from the top of the bank to the toe, with a 10-foot toe extension to project against further scouring at the toe. The estimated cost for project construction is $88,500, with a benefit-to-cost ratio of 6.6, and therefore satisfies the requirements for Federal participation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1991
- Accession Number
- ADA252240
Entities
Organizations
- Rock Island District, U.S. Army Corps of Engineers