The project is located on the Minnesota River in Carver County and Chaska, Minnesota, and includes both Chaska and East Creeks, which are tributaries of the Minnesota River. The plan for flood protection for the city of Chaska provides for structural measures: upgrading and extending the eexisting levee system around Courthouse Lake; construction of a pumping station; diverting Chaska and East Creeks; construction of a drop structure and inlet and outlet structures associated with the two diversions. The most significant environmental impact is the replacement of the natural streambed of Chaska Creek with reinforced concrete channel. Other impacts include restriction of public access to the wildlife refuge, the loss of about 20 acres of floodplain forest, and the residential relocations. To help offset the environmental losses, the plan would include several mitigation features such as: habitat improvement measures in the refuge, planting plan on project lands, landscaping, and beautification measures.