Mat-Su commuters will experience significant infrastructure improvements this summer, as repair work begins on the Glenn Highway Knik River Bridges. The northbound bridge, a key route located between Anchorage and the Mat-Su Valley, is scheduled to close for 30 days starting Wednesday, April 23, 2025. The Alaska Department of Transportation and Public Facilities (DOT&PF) has partnered with Hamilton Construction Company to rehabilitate these critical bridges.
During the northbound bridge closure, all traffic will be redirected to the southbound bridge. To accommodate the shift, a specialized equipment known as a Road Zipper will adjust the concrete barriers daily. This adjustment will create two lanes for peak travel directions: toward Anchorage in the morning and toward the Mat-Su Valley in the afternoon.
“The Glenn Highway bridges are a vital link between the Mat-Su Valley and Anchorage,” stated DOT&PF Commissioner Ryan Anderson. He emphasized the project’s focus on sustaining crucial infrastructure and reinforcing important community connections, highlighting the need for sturdy transport routes in Alaska’s unique landscape.
Both bridges on this route require attention, with the northbound bridge being 60 years old and the southbound bridge 30 years old. Post-northbound repairs, the southbound bridge will undergo similar work later in the summer.
Drivers must anticipate speed reductions to 45 MPH, possible congestion, and extended travel times during the project. The use of narrower lanes and shoulders will be necessary, and vehicles over 11 feet in width will need to obtain special permits from DOT&PF’s relevant office.
Potential traffic issues can be mitigated through carpooling, flexible commuting, or altered work schedules. Travelers are encouraged to check 511.alaska.gov or use the 511 app for updated information and further project details can be found at www.glennbridges.com.
The DOT&PF is responsible for a range of transportation services and infrastructure management across Alaska, including 237 airports, a sizable marine transportation system, extensive highway mileage, and numerous public facilities. According to the department, its mission is to “Keep Alaska Moving through service and infrastructure.”
