sentences:  PA 645 passes near residences and an industrial park, crossing Swatara Creek before it reaches its northern terminus at an intersection with PA 443 south of the borough of Pine Grove.When routes were first legislated in Pennsylvania in 1911, present-day PA 645 was not given a legislative number.By 1928, the road from Myerstown to a point north of Kutztown was paved while the remainder was unpaved; at this time the road was unnumbered.