Detailed Project Report and Environmental Assessment. Section 14 Emergency Streambank Protection: Turkey River, Clayton County Road 1712, Osterdock, Iowa
Abstract
This report addresses the problem of streambank erosion on the left descending bankline of the Turkey River paralleling County Road 1712 approximately one-half mile northwest of Osterdock, Iowa. The study area involves approximately 800 linear feet of bankline which severely eroded during the past 2 years due to disastrous flood events in August 1990 and June 1991. A site investigation was conducted to determine the severity of the erosion along the 'farm-to-market' road just northwest of the town of Osterdock. This Detailed Project Report recommends minimal clearing on the bank and placement of approximately 5,000 tons (3,333 cubic yards) of Iowa Class D riprap to provide a 2H on 1V slope, from the top of bank to the toe, for approximately 800 linear feet. Additional riprap protection will be place at both ends of the project. The total estimated cost of the project is $138,000, with a benefit-to-cost ratio of 2.8, and therefore satisfies the criteria for Federal participation in the project's construction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1991
- Accession Number
- ADA252241
Entities
Organizations
- Rock Island District, U.S. Army Corps of Engineers