Definite Project Report for Section 14 Emergency Streambank Protection. North Raccoon River, Iowa State Highway 7 Bridge in Buena Vista County, Iowa. Revision

摘要

The following letter report is a summary of a study made on providing emergency streambank protection along the left descending bank of the North Raccoon River to curtail erosion which is endangering the east approach roadway, abuttment wingwall, and deck of the Iowa State Highway 7 bridge in Buena Vista County, Iowa. The proposal for emergency streambank protection presented in this report recommends the placement of riprap on rock bedding along approximately 375 linear feet of the left downstream bank of the North Raccoon River. The total estimated cost for the project is $33,900, with a benefit-to-cost ratio of 17.3. The project satisfies the criteria for Federal participation and is recommended for construction. Keywords: Flood control, Water resources, Army corps of engineers. (SDW).