(Outhouse Mailbox) W. of Dyer, Gibson County, TN. TN77 (Yorkville Hwy - becomes Dyer Hwy) W. 5.7 miles from jct with US45W NW of Dyer to the mailbox on the N. side of the road at 110. (N36 05.529 W89 06.258) Photo by Jack & June Schmidt 5-19-18.