280th Street W. (County Road 86) Roundabouts

​​​​​​​​County Projects 86-44 a​nd 86-43

Dakota County will construct two single lane roundabouts. The roundabout will be at:

• 280th Street W. (County Road 86) and Chippendale Avenue (Highway 3) within Castle Rock and Waterford townships
• 280th Street W. (County Road 86) and Randolph Boulevard/Emery Avenue (Highway 56) within Randolph and Hampton townships

The purpose of the project is to improve safety and traffic operations.  Construction includes constructing single lane roundabouts, restriping, and drainage improvements.

Road clos​ures and detours

The intersections of 280th Street W. (County Road 86) and Chippendale Avenue (Highway 3) and 280th Street W. (County Road 86) and Randolph Boulevard/Emery Avenue (Highway 56) are closed for construction.  Please follow the posted detours:

County Road 86 and Highway 3 Detour Map
County Road 86 and Highway 56 Detour Map

Construction ​progress​

July 10–18

Highway 56 roundabout

• ​Continue grading and excavating for the new roadway
• Installing storm
• Installing wiring for the proposed streetlights — completed by Dakota Electric

Highway 3 roundabout​

• Continue grading and excavating for the new roadway
• Installing storm sewer has been delayed due to incorrect material being delivered
• Relocating temporary lines to move out of the way for the roadway grading