36 Pa. Stat. § 851
Certain sections of public road as follows:
Beginning at the Angelo McCormick farm on the Clark's Mill and Sandy Lake road, in the county of Mercer, and proceeding thence to the borough of Stoneborough;
Beginning at Moorefield's Cemetery, on State highway route, number three hundred and twenty, in the county of Mercer, thence in a southwesterly direction, past Freebles Corners, through the borough of Wheatland, by way of Council Avenue in said borough, thence in a southwesterly direction to McBrides Corners, and thence in a westerly direction to the Pennsylvania-Ohio State Line;
Beginning at the west end of the bridge crossing the Shenango River at West Middlesex Borough, Mercer County, and extending thence in a westerly direction to McBrides Corners,--shall be adopted by the Commonwealth as State highways to be constructed, maintained, and improved at the sole expense of the Commonwealth under the provisions of present or future laws governing main State highways.
36 P.S. § 851