The public is being urged to stay clear of the work site as BNSF Railway begins its portion of Boulder County’s Fourmile Creek Trail underpass project on Monday, Oct. 23.
The nearby Cottonwood Trail and Fourmile Canyon Creek Path northeast of Boulder will remain open during construction, the county said in a news release.
"But it is imperative that people do not trespass on the construction site or trail closures may be enforced to protect public safety," the county said.
You can view a map of the construction area here.
After BNSF finishes its work on railway underpass infrastructure, Boulder County will begin the final phase, which includes the actual pathway connection.
The county said that, when completed in 2024, the underpass will wrap up a multi-year project that helps bicyclists and pedestrians navigate between Gunbarrel and the City of Boulder.
It also will be a valuable link for people seeking to access the county’s Longmont-to-Boulder (LoBo) Trail network, the county said.
This county effort is being completed in cooperation with BNSF, and the City of Boulder’s Transportation and Mobility and Open Space and Mountain Parks (OSMP) departments.
The project is being paid for through a dedicated fund for trail implementation that was established by voters in 2007 and extended in 2022.
For more information, visit the project webpage.
