The route passes over Norfolk Southern 's Lehigh Line before it descends off the Treichlers Bridge and intersects Blue Mountain Drive in the community of Treichlers .
PA 145 crosses the Lehigh River on the Treichlers Bridge , at which point it enters Lehigh Township in Northampton County .
The route passes over Norfolk Southern 's Lehigh Line before PA 145 descends off the Treichlers Bridge and intersects Blue Mountain Drive in the community of Treichlers .
PA 145 crosses the Lehigh River on the Treichlers Bridge , at which point it enters Lehigh Township in Northampton County .