Flood Control, Roseau River, Roseau and Kittson Counties, Minnesota. Final Environmental Impact Statement.
Abstract
The project would include channel modifications on a 46.2-mile reach of the Roseau River between the city of Roseau and the border with Canada in northwestern Minnesota. The major modifications would involve channel widening, mainly through one-bank excavation. In addition three levees would be constructed with material excavated from the channel, channel cutoffs would be installed at eight locations, and approximately 59 side-ditch inlet structures would be constructed to control erosion. Flood stages would be reduced on approximately 77,000 acres of the Roseau River floodplain. Agricultural drainage would be improved during flood periods, and there could be some increased land usage for agricultural purposes. The project could result in some localized erosion and sloughing along the river banks. In addition excavation of riffle and cove areas and construction of isolated cutoffs would increase turbidity levels and stream temperatures and would reduce oxygen solubility which would adversely affect aquatic habitat. Any cultivation of previously uncultivated lands would effect a decrease in terrestrial vegetation and wildlife habitat in the project area, which would have a secondary adverse impact on recreation values. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1976
- Accession Number
- ADA121895
Entities
Organizations
- St. Paul District, U.S. Army Corps of Engineers