County Road 86 (280th Street) from Garrett Avenue to Highway 3 (Chippendale Avenue) reconstruction project will continue this summer. 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–fall 2024
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.
The contractor is planning on opening the entire stretch of County Road 86 on the evening of Nov. 17 until next spring when construction activities will begin in Castle Rock and the trestle bridge. Work may continue on the roadway. Please drive with caution as the roadway will be gravel from the railroad bridge to Highway 3.