Sunset Hill Road Bridge in Greenough Closed Until Further Notice
Posted on September 09, 2025
Due to structural concerns, the Sunset Hill Road Bridge near Greenough will be closed until further notice, effective immediately. Missoula County Public Works closed the bridge Monday following a Montana Department of Transportation inspection demonstrating the bridge can no longer carry traffic safely or reliably. The bridge is closed to all traffic, including foot traffic. Drivers will need to take an alternate route.
Public Works crews placed signage indicating the closure at each end of the bridge, which spans the Blackfoot River and is often used by locals and recreators throughout the year, especially in the summer and during the fall hunting season. Missoula County officials are currently coordinating a meeting with relevant agencies to discuss impacts to residents and recreators and possible solutions.
The single-lane truss bridge was constructed in 1907. The bridge previously had a weight limit of 7 tons, but a recent inspection showing increased damage to the truss prompted MDT to order to close it. Missoula County has developed a preliminary design plan for a future bridge to replace the existing one after staff determined rehabilitating it is not the best option. The proposal would replace the existing structure with a new single-lane truss bridge.
Replacing the bridge will cost approximately $4.1 million, and Missoula County applied for two federal grants in recent years but did not receive them. The County continues to explore funding opportunities beyond local property tax dollars to pay for its replacement.
For more information, call the Public Works Road Division at 406-258-3772.
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