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https://hdl.handle.net/11681/40199| Title: | Environmental Assessment : Chippewa River Diversion Approach Channel Bank Stabilization, La qui Parle Flood Control and Water Conservation Project, Chippewa County, Minnesota |
| Authors: | United States. Army. Corps of Engineers. St. Paul District |
| Keywords: | Chippewa County (Minn.) Chippewa River (Wis.) Flood control Environmental protection Environmental management |
| Publisher: | United States. Army. Corps of Engineers. St. Paul District. |
| Abstract: | The proposed project is located along the banks of the approach channel for the Corps’ Chippewa River Diversion, located in west-central Minnesota near the city of Watson. The proposed project would address problems with bank erosion resulting from a combination of high flows, ice, and high near-bank velocities. More specifically, during high flow in the early spring, the west bank (which has riprap) has been observed covered with ice, thus constricting the channel and creating scour conditions along the east bank. As a result, the east bank (which has no riprap) has sustained considerable erosion damage. Much of the bank is exposed and too steep for vegetation to re-establish. Portions of the bank have slumped and exposed a portion of the pipeline that is a part of the upstream U.S. Geological Survey (USGS) gage station. In addition, a small portion of the existing riprap on the west bank had settled or been lost to the channel. Without stabilization measures, high flows will continue to eat away at the banks, eventually threatening the Chippewa River Diversion structure that serves to protect against downstream flooding to the city of Montevideo, Minnesota. In addition, there will be further degradation of aquatic and shoreline habitat as well as water quality. The purpose of the proposed project is to protect and stabilize these banks against future erosion from high flows. |
| Description: | Environmental Assessment and Finding of No Significant Impact |
| Rights: | Approved for Public Release; Distribution is Unlimited |
| URI: | https://hdl.handle.net/11681/40199 |
| Appears in Collections: | Environmental Documents |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Chippewa River Diversion Approach EA and FONSI 2012.pdf | 3.29 MB | Adobe PDF |  View/Open |