Construction On 146th St. & Allisonville Road Is On Schedule

Widening of White River Bridge Will Require Overnight Closure of 146th Street

Six months after construction first began at the intersection of 146th Street and Allisonville Road, the Hamilton County Highway Department says the project is on schedule. Crews are currently installing storm sewer structures and prepping new lanes of traffic for pavement, while also widening both sides of the White River Bridge.

“Luckily we’ve had a very dry summer so crews were able to make a lot of progress,” says Matt Lee, the department’s Bridge Program Engineer. “The hope is to have the crews working on the bridge out of the water in the coming months so we can try to avoid any large rain events that could slow our progress.”

In order to better accommodate that, a full overnight closure of 146th Street has been scheduled for Wednesday, October 25. Crews will use that time to set the new bridge beams. “That will be a major undertaking, one that requires cranes removing and lowering beams off semi-trucks. The process will go much faster and be a lot safer if we can do it under a full road closure.” 

Crews are currently in Phase 2 of the massive undertaking which will convert the current intersection into a grade-separated interchange, with 146th Street going over a roundabout on Allisonville Road. The project started in March and won’t be complete until summer 2025. “Next spring, probably around March, will be the next big traffic switch,” Lee adds. “That’s also when we’re expecting to start the 90-day closure of Allisonville Road.” 

The Highway Department has created an informational website and an e-newsletter that provide the very latest on construction and lane restrictions. Both can be found at www.streamline146.com