years after the parallel SR 125 was widened (but not realigned). Because this was done before or during the renumbering, the old road here is known as Old State Route 74, rather than Old State Route 32 to the east. Improvement of the rest of the road did not take place until after it was added to the Appalachian Development Highway System in 1965. This proposed Appalachian Highway—part of Corridor D—was to run across the southern part of the state from I-275 outside Cincinnati to Belpre. From the east end of SR 32 east of Peebles, the route was to continue northeast, joining SR 772 near Elmgrove, and following SR 124 beyond Jackson to Roads. After continuing northeast to Radcliff, it would parallel SR 346 and a portion of SR 143, merging with US 50 west of Albany and following it past Athens and Coolville to Belpre. A never-built branch, planned as part of Corridor B, would have followed SR 73 and SR 348 from east of Peebles to Lucasville on US 23 (Corridor C). In 1998, the Ohio Department of Transportation (ODOT) inspected a section of SR 32 in Jackson County due to repeated pavement failure and pothole subsidence featured in the median. Abandoned underground mines were visible near the roadway, but there were no mine maps available for the area. An electrical resistivity tomography was conducted to see if there were mine voids underneath the roadway. Several pits at were excavated revealing that mine voids were detected. In response to the tests, ODOT closed the highway east of Wellston and began excavating the roadway to remediate the mine subsidence in November 1998. Work to repair the roadway was completed in March 1999. In 2002, two interchanges were constructed along SR 32. Olive Branch–Stonelick Road intersection in Clermont County was constructed into an interchange. The $7 million project (equivalent to $ in ) was jointly funded by Clermont County and ODOT's Transportation Review Advisory Council (TRAC). The interchange project was awarded the Donald C. Schramm Award by the American Society of Highway Engineers (ASHE) Triko Valley Section in 2002. Work also began on replacing two at-grade intersections of SR 124 and SR 327 into a single interchange near Wellston in Jackson County. The $9 million project (equivalent to $ in ) was funded jointly by the Federal Highway Safety Infrastructure program and ODOT's Highway Safety Program (HSP). The project