(Preble County, OH)--A heavily traveled Whitewater Valley highway is about to be shut down for an extended period of time.  In two weeks, the U.S. 35 bridge that crosses over I-70 and then allows drivers to merge onto the westbound interstate near the state line in Preble County will shut down for about six months.  It means that westbound traffic on 35 will have to divert to a different entrance onto I-70.  The closure is to allow for a complete replacement of the bridge deck.