The next bridge replacement project included in the Northwest Bridge Bundle project is scheduled at the end of this month. The Putnam County Missouri Route 129 bridge over North Blackbird Creek, located north of Unionville, will close beginning Monday, Sept. 30. The project to replace the bridge is expected to continue through February 2025. During construction, motorists should seek an alternate route around the closure. The North Blackbird Creek Bridge was built in 1947 and has a traffic volume of approximately 417 vehicles per day.