Boulder
• 30th Street and Colorado Avenue Underpass Project: Left turns will be restricted westbound, eastbound and southbound for underpass construction. Sidewalk detours where noted (southeast quadrant sidewalks closed); use temporary crossings at 30th/Euclid Avenue and Colorado west of the intersection. Cyclists merge with traffic. Northbound bus stop on 30th (BOUND) is closed; board at next stop. Anticipated end date is Dec. 31. The intersection of 30th Street and Colorado Avenue is fully closed.
• North Broadway: Pavement will be improved to concrete and buffered bike lanes installed. Vehicle travel lanes will shift to the existing northbound lane and bike lane. The west-side sidewalk will be closed; the east-side sidewalk can be used. The bicycle and pedestrian reroute will be to the west along Ninth Street and multiuse path. Activity time is from 7 a.m. to 5 p.m. weekdays. Anticipated end date is Dec. 30.
• Hill Hotel: Westbound Pleasant is open for local traffic from Broadway to the alley. The eastbound lane is closed. This is for demolition of old buildings and waterline and new sewer work. Activity time is 7 a.m. to 5 p.m. weekdays. Anticipated end time is Jan. 31, 2024.
• Ithaca Drive and Wildwood Road: A full road closure at Ithaca and Wildwood for the installation of upgraded storm sewer infrastructure is expected through late September. Please follow the posted detour signs.
• Colo. 157: There will be a single-lane closure in both directions of Colo. 157 over the BNSF Railroad — the location of the Boulder bridge (MP 3.52) — while crews remove existing expansion joints and concrete, and perform other critical bridge repair work. Work is expected to last through Nov. 22.
• Arapahoe Avenue: Eastbound Arapahoe will be reduced to a single lane, and the westbound inside turn lane will be closed from the 3300 to the 3400 block Sept. 19-26 for repair of a private gas service. Work will be done from 10 p.m. to 6 a.m.
Longmont
• Dry Creek Drive: Dry Creek will be closed between Nelson Road and Lykins Gulch Roach Sept. 19-Oct. 18 for public utilities installation.
• Longs Peak Avenue: The road will be temporarily widened between Sunset Street and the Sunset Pool parking lot, and the two lanes of traffic will be shifted to the south so construction equipment can be parked on the north side of Longs Peak Avenue. There will also be initial work on the waterline that runs underneath Sunset Circle. Residents and commuters should plan for construction activities from 7 a.m. to 7 p.m. weekdays.
• Coffman Street: Southbound Coffman will be closed and detoured to Main Street during a water main replacement. Work hours are from 7 a.m. to 7 p.m., and closures are expected to last through mid-October.
• Kimbark Street: Kimbark will be closed between 10th and 11th avenues, Sept. 26-Nov. 11, for the installation of a 24-inch storm sewer, manhole and inlet improvements. Work hours are 7 a.m. to 7 p.m., but closure is 24 hours a day. There will be a local detour for vehicular, pedestrian and bike traffic.
Boulder County
• Sugarloaf Road: Due to an unsafe and confined work zone, Sugarloaf Road will need to be closed between Colo. 119 and Betasso Road during the following times for the next four weeks: 9:30 a.m.-noon and 1-3:30 p.m. Monday through Friday. Sugarloaf will remain open in a single-lane configuration through the work zone during all other hours. Boulder County is working on the last 2013 flood recovery-related project on Sugarloaf Road. The project involves the construction of five retaining walls, drainage improvements and reconstruction of approximately 2,000 feet of roadway just up from Colo. 119 and will include a 4-foot shoulder in the uphill lane. In addition, Colo. 119/Boulder Canyon Drive will be reduced to one lane from 8 a.m. to 4:30 p.m. Monday through Friday. The project is anticipated to last into October, weather permitting.
• Olde Stage Road Project: Milling the old surface is planned to start Monday. Work will start from the southern end at Lee Hill Drive and proceed north, then crews will flip around at Left Hand Canyon Drive and work on milling the southbound lane. This work is expected to take all week. Expect long work zones, which means delays could range up to 15 minutes. Alternate routes are advised. Cyclists may want to avoid Olde Stage for the next four to six weeks as the roadway will be in a rough, milled condition until paving is completed. After milling, crews will start repairing the subsurface in order to make the new roadway stronger. Crews also will be working on widening the southern portion of the road (Lee Hill to the top of the first hill) to create a 4-foot shoulder in the northbound climbing lane. Once this work is done, paving will begin. Paving is expected to take two to three weeks to complete. Crews are expecting to have the roadway completely repaved by early October, weather permitting. Additional shouldering, striping and final cleanup work is expected to last until the end of October.
• Apple Valley Road. The bridge over the North St. Vrain Creek at the north entrance to Apple Valley Road will be painted for approximately two weeks starting Sept. 12. In order to accommodate painting, the bridge must be closed from 8 a.m. to 5 p.m. Monday-Friday. Access to Apple Valley Road will be maintained at all times from the southern end of Apple Valley Road just outside Lyons.
Louisville
• South Boulder Road: Work will include new ADA ramps, signal timing and median island work. A new HAWK (high-intensity activated crosswalk) signal will be installed at Eisenhower. Intersections along South Boulder Road that will be improved include Main Street, Centennial Drive, Garfield Avenue, Via Appia and Eisenhower Drive. Work is expected to last through September.
Erie
• Erie Parkway: Through Sept. 30, a contractor will begin a mill and overlay project of westbound and eastbound Erie Parkway between County Line Road and Briggs Street. Frequent traffic shifts and lane closures are expected during the construction. One lane for traffic will be available in each direction through the project with minor delays when equipment and materials are being moved or placed. Delays should not exceed 10 minutes.
• Weld County Road 10: The Weld County Department of Public Works is paving WCR 10 between WCR 5 and WCR 7. Detour signage is placed within Erie limits though this project is fully managed by Weld County. Work is expected to wrap up by Oct. 7, depending on weather. Follow detour and traffic signage and consider alternate routes. Local access will be open for residents or businesses along this stretch during construction.
• Weld County Road 5: Southbound lanes of WCR 5 will be closed from 7 a.m. to 7 p.m. on Saturday only, for landscaping work. All southbound traffic will be detoured west on WCR 10, then south onto Horizon Boulevard, then east onto Flora View Drive where traffic can access WCR 5 at the Flora View intersection.
Weld County
• Weld County Road 10: WCR 10 will be closed from WCR 5 to WCR7 through Oct. 14 for road construction.
• Weld County Road 23: WCR 23 will be closed from WCR 6 to Colo. 52 through Sept. 30 for paving operations.
• Weld County Road 23: WCR 23 will be closed from Colo. 52 to WCR 18 through Oct. 7 for bridge redecking and guard rail work.
• Interstate 25/WCR 34 bridge overpass: The overpass is closed. Vehicles may use on/off ramps only and cannot cross over.
• Colo. 60/Interstate 25: This intersection and approaches will be closed through Oct. 2. There will be intermittent ramp closures throughout the closure. Follow marked detours.
