State Route 235/State Route 309 overlap between County Road 45 and Township Road 35, south of Ada, will close on Monday, May 14 for approximately five days for a culvert replacement. 

State Route 235 traffic will be detoured onto State Route 309, Interstate 75 and State Route 81 back to State Route 235. 

State Route 309 traffic will be detoured onto State Route 235, State Route 81 and Interstate 75 back to State Route 309. 

Work is being performed by the ODOT Hardin County maintenance garage