Detailed Project Report and Environmental Assessment for Section 14 Emergency Streambank Protection, Soap Creek County Bridge Site Number 3, Davis County, Iowa. Revision
Abstract
This report addresses the problems of streambank erosion on Soap Creek at County Bridge Site No. 3 in sec. 21, T. 70 N., R. 15 W., Marion Township, Davis County, Iowa. The study area, which is located on both abutments of the bridge, involves approximately 200 linear feet of bankline. Under the authority of Section 14 of the 1946 Flood Control Act, as amended, Rock Island District representatives made a site visit to Davis County, Iowa, in March 1990 to investigate the severity of the erosion at several bridges in the county. This Detailed Project Report recommends that riprap be placed around the abutments and wingwalls of County Bridge No.3. This protection should extend beyond the abutments in both directions. Additional toe protection and end protection will be used on both sides of the creek banklines. Approximately 1,800 tons of riprap will be placed to the top of the bank to provide minimum 1:V on 2:H slope. The total estimated cost for the project is $50,000, with a benefit-to-cost ration of 3.3. The project satisfies the criteria for Federal participation and is recommended for construction.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1990
- Accession Number
- ADA251282
Entities
Organizations
- Rock Island District, U.S. Army Corps of Engineers