Accession Number : ADA140267

Title :   Flood Control Minnesota River, Minnesota, Mankato-North Mankato-Le Hillier. Final Supplement II-B to the Final Environmental Impact Statement for Bridge Relocations. Main Street, Trunk Highway 60 Bridge over the Minnesota River between Mankato and North Mankato.

Corporate Author : CORPS OF ENGINEERS ST PAUL MN ST PAUL DISTRICT

PDF Url : ADA140267

Report Date : Sep 1982

Pagination or Media Count : 218

Abstract : The St. Paul District is currently constructing flood control works on the Minnesota and Blue Earth Rivers to protect developed portions of the floodplain in Mankato, North Mankato, and Le Hillier from frequent flood damage. These works include the raising of bridges to clear the high water of the standard project flood. The Main Street bridge over the Minnesota River must be raised or replaced to an elevation approximately 30 feet above the existing bridge to clear the railroad on the Mankato side, an action requiring extensive work on the approaches to the bridge as well. Of several plans considered, two were selected for detailed study. Alternative 1CC would begin in North Mankato on Belgrade Avenue at the same location as the existing bridge and connect to Mulberry street one block north of Main Street, touching down between Second and Broad Streets. Adverse neighborhood impacts would be most severe in Mankato. Alternative 2A would begin in North Mankato on Range Street and connect to Warren Street at Pike Street in Mankato. Adverse neighborhood impacts would be most severe in North Mankato. Access patterns between the Central Business Districts of the two cities would be altered. After the public hearing for the supplement to the final environmental impact statement, a minor design change in Alternative 1CA shifted the proposed bridge realignment 50 feet to the north on the Mankato side of the river. This modification, identified as Alternative 1CC, has been tentatively selected because it better addresses identified public concerns and because it makes net positive contributions to the study objectives.

Descriptors :   *Bridges, Relocation, Minnesota, Urban areas, Rivers, Flood control, Roads, Ground traffic, Environmental impact statements

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE