Boulder

• 28th Street improvements — Pearl to Iris: This project will improve multimodal travel along 28th Street from Pearl to Iris. Northbound 28th and Valmont Road RTD Stop #17992 serving 205 and BOLT routes will be temporarily relocated to just south of the Valmont intersection until Dec. 31.

• 19th Street and Fourmile Canyon Creek Underpass: Crews will begin replacing the bridge over Fourmile Canyon Creek and construct a bike/pedestrian underpass. Northbound 19th Street will be closed to all travel between Sumac and Upland. Vehicle/RTD service detour via Quince. Work is anticipated to end April 1, 2026.

• Sixth Street bridge maintenance: The city will conduct structural repairs on the surface and beneath the Sixth Street bridge, including waterproofing, HMA overlay and tree trimming.A full road closure during surface work, and path closure during work beneath the bridge will be required. Work will be conducted 8 a.m. to 5 p.m. through July 25.

• Pavement rehabilitation: Total roadway reconstruction requires one-lane traffic in each direction from Broadway to the entrance of Boulder Canyon. Closures will remain permanently in place for several weeks at a time. On the far west end of the project zone, there will be a brief period where the two-lane road is reduced to a single lane. Work will take place between 7 a.m. and 7 p.m. through Aug. 29.

Boulder County

• Ogallala Road repairs between Colo. 119 and North 83rd Street: Road maintenance will be repairing Ogallala Road on both sides of the BNSF train tracks just east of Colo. 119. The work will require a full roadway closure from 7 a.m. Monday through 4 p.m. Thursday.

• Sugarloaf Road culvert replacement at Betasso Road: Multiple culvert replacements on Sugarloaf Road at Betasso Road will require lane closures and traffic shifts, which will result in travel delays of up to 15 minutes. Work is anticipated to last through October.

• City of Boulder 63rd Street waterline replacement: Boulder is conducting a waterline replacement project that will have several traffic impacts from Monday through February. Throughout the project, 63rd Street/Andrus Road/62nd Street will be closed between Jay and Valmont and open to local and business access only. As the first phase winds down in August, both lanes of traffic on 63rd Street between Gunbarrel Avenue to the 63rd Street railroad crossing will shift to the east side of 63rd Street.

• Colo. 119 safety, mobility and bikeway construction: CDOT will begin work on Colo. 119/Diagonal Highway. This project is anticipated to be completed in spring 2027.

Erie

• WCR 7 waterline improvements: The town of Erie is working on the WCR 7 Waterline Improvements project. This project will install a new transmission waterline to secure the future delivery of potable water, impacting approximately 2.7 miles of WCR 7 and requiring significant traffic changes. Expect full closures between WCR 12 and Colo. 52, and single-lane traffic south to Erie Parkway through mid-August.

• County Line Road sidewalk closure: Beginning Monday through Friday, July 25, Centurylink fiber installation will occur along the west sidewalk of County Line Road between Balcolm Street and Telleen Avenue. This work will require a full closure of the southbound lane in this stretch. Flaggers will assist with alternating traffic in both directions. The sidewalk on the west side will also be closed, and pedestrians will be detoured to the east side of the roadway. Work hours will be from 9 a.m. to 4 p.m.