County Road 86 (280th Street) from Garrett Avenue to Highway 3 (Chippendale Avenue) will be reconstructed. The project will include the addition of 8-foot shoulders, turn and bypass lanes at public intersections and drainage improvements from County Road 23 (Galaxie Avenue) to Highway 3 (Chippendale Avenue). Within Castle Rock, the improved County Road 86 will have one travel lane in each direction, a continuous center turn lane, and curb and gutter with storm sewer.
The replacement of the existing trestle railroad bridge in Castle Rock is also included in the reconstruction project. The bridge replacement includes increasing the vertical clearance to state standards, a design without a center pier and increasing the opening width to improve sight lines and safety.
August 2022–October 2023
Get email updates
To receive email updates for this project, email Stacy Reilly at
email@example.com. Please include “CP 86-34 Updates" in the subject line.
County Road 86 is open. This is still an active construction area, please drive with caution. Work has been suspended for the holidays and will resume after New Year’s Day. Work will continue around the temporary bridge for 2-3 weeks.
Dec. 16–Jan. 28
- Relocating private utilities throughout the project
- Begin installing the sheet piling for the temporary bridge
County Road 86 Newsletter