The City of Boulder’s Open Space and Mountain Parks (OSMP) Department will highlight large projects for 2018 on this page.
Xcel Transmission Line Replacement Project
OSMP visitors may encounter temporary trail closures and delays southwest of Boulder while Xcel conducts transmission line replacement work. Because of the rugged location of transmission lines in Bear Canyon, longer-term trail closures in the area are likely to occur beginning in August. OSMP recognizes the impacts this transmission line work is having on residents and visitors, and we appreciate your patience while this work occurs.
Xcel’s work is occurring along its right-of-way on city open space south of Boulder Canyon Drive and north of Eldorado Springs Drive. It is being conducted to ensure federal compliance and maintain electric reliability in the area and is expected to be completed by the end of September. The City of Boulder has been working with Xcel to mitigate, as much as possible, noise impacts from helicopter flights needed for this project. In advance of this work, the city and Xcel agreed on a temporary license agreement that requires the company to adhere to specific terms and conditions related to access, disturbance and reclamation and restoration – designed to minimize resource and visitor impacts.
OSMP Master Plan
Open Space and Mountain Parks has kicked off a long-term effort to establish a community-supported plan that will guide the management of the community’s open space over the next decade and beyond. Share your comments now and sign up for email updates. Our first "window of engagement" for the master plan will close on Friday, March 30.
Rocky Mountain Greenway
The City of Boulder is part of a multi-agency partnership supporting the development of the Rocky Mountain Greenway in Jefferson and Boulder County.
In May of 2016, the Boulder City Council approved the city’s participation in the partnership’s grant application to Federal Highways Administration (FHWA) for funding to create an underpass beneath Colorado Highway 128 connecting Boulder’s open space trails with the Rocky Mountain Greenway and the Rocky Flats National Wildlife Refuge.
To address public health and safety concerns, the City Council made the city’s support and financial commitment to the underpass project conditional upon the results of soil sampling for radionuclides demonstrating that contamination levels (if any) fall below federal human health standards.
Jefferson County has coordinated the partners in the grant application with FHWA, has led the contracting of a consulting firm and has prepared a website with more information about this project to ensure that community members of all the partner jurisdictions have the information available at the same time as the project moves forward. Visit their website to learn more about the partnership, sign up for project updates, and provide comments.
City of Boulder Background Information
Open Space Board of Trustees (February 11, 2016)
City Council Action (May 3, 2016)
Boulder Falls opened Friday, June 8, 2018. Repairs began in February and included replacing gabion baskets, slope stabilization and trail widening. Additional site improvements will continue in 2019. Thanks for your patience as OSMP works to repair and improve this area.
South Foothills Trail
In March-May 2018, an OSMP contractor completed repairs of 2/3 mile of the Foothills South Trail from the Utica Ave neighborhood access north to Four Mile Creek. The trail was damaged by the September 2013 flood, which removed the gravel trail surface (crusher fines) and caused erosion. The trail had several drainage features installed to help lessen the potential for future erosion damage. Trail re-construction statistics include:
- 12 rolling dips constructed on the trail to divert water off of the trail surface and prevent erosion.
- Over 1400 linear feet of trailside ditch constructed to divert ground surface water away from the trail.
- The trail surface was re-constructed at 8 feet wide (the same as the pre-construction width), with a 4-inch layer of crusher fines gravel installed as the trail surface. 336 cubic yards of crusher fines (enough to fill 4 ½ city buses!) were used on the project.
Future improvements are scheduled for the Foothills South Trail in upcoming years, including a new bridge over Four Mile Creek, and a short re-route on the section leading down to Wonderland Lake to reduce ongoing erosion issues.