(Whitewater Valley)--Gas prices across the Whitewater Valley continue to fall with many stations not only below the four-dollar mark, but well below it.  According to new numbers from AAA Friday morning, Wayne County average stands at $4.12.  Both Preble and Darke County are now below four dollars.  Some stations in Preble County Friday morning were as low as $3.55.  Wayne County’s average is now more than a full dollar less than it was six weeks ago when it reached its high-water mark of $5.21.