Work continues on one of the largest and most expensive road construction projects in Iowa that has already been delayed by a contractor mistake.

It’s the flyover bridge at Interstate 35 and US 30 in Ames.

Iowa Department of Transportation engineer Scott Dockstader says the new bridge is expected to make thing safer for drivers.

Dockstader says the project appears to be on-pace for a mid-summer opening of the new flyover bridge.   The new bridge was supposed to be completed by the end of this year — but the work was delayed after it was discovered the Minnesota contractor made mistakes with the elevation of the piers and the anchor bolts that go into the piers weren’t positioned properly.