A State highway is hereby established, the route of which shall be as follows:--
Beginning at a point one hundred feet, more or less, south of the south side of the viaduct where State highway route number one hundred and thirty-eight passes under the Pennsylvania Railroad at or near Coal Spring, in Cornwall Township, Lebanon County, and extending, in a general westerly direction, south of the Cornwall and Lebanon branch of the Pennsylvania Railroad, to the post office at Mount Gretna, Lebanon County; thence, along the south side of Conewago Lake, to the western end of the lake, and thence in a westerly direction to the western end of an improved road on the State Game Reservation.
36 P.S. § 811