Boulder County

• 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.

Longmont

• Coffman Street: Mobility improvements on northbound Coffman Street from Fourth Avenue to Ninth Avenue and southbound Sixth Avenue to Ninth Avenue will occur until June 24. Work hours are 7 a.m.-6 p.m.

• Dry Creek Drive between Lykins Gulch Road and Ceran Avenue: Dry Creek Drive will have closures for asphalt rehabilitation on Nelson Road. Expect lane closures and delays on Nelson Road between Dry Creek Drive and Hover Street. Work will take place from 8 a.m. to 4:30 p.m. through June 19.

• Third Avenue crane service: On Monday, expect westbound travel lane closures on Third Avenue between Kimbark and Collyer. Parking will be restricted on the north side of Third Avenue, and westbound traffic will be routed through the center/turn lane on Third. Work will take place from 7 a.m.-2 p.m.

Frederick

• Waterline installation: Thalle Construction is installing a 42-inch waterline as part of the Thornton Water Project. The waterline will pass through two miles of the Frederick Planning Area. The pipeline will be installed at a depth of at least 4 1/2 feet, with crossings under WCR 14 and WCR 16 at 6 feet deep. To install the pipeline, planned 72-hour road closures will be necessary WCR 14 in mid-March, WCR 17 in mid-June and WCR 16 in early July.

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.