Pennsylvania Route 18 - Route Description - Beaver County

Beaver County

The route enters the borough of Frankfort Springs as it enters Beaver County, and meets the southern terminus of PA Route 168 at the north end of the borough. Passing through nearly 5 miles (8.0 km) of state park land, Route 18 eventually meets US 30 in the village of Harshaville. The route then junctions with PA Route 151 at the village of Mechanicsburg about 1.5 miles (2.4 km) later, and then passes through the village of McCleary. As Route 18 approaches the Ohio River, it turns east-northeast before its first interchange with I-376 about 2 miles (3.2 km) west of the borough of Monaca. The route enters the borough, turns north-northwest, crosses the Ohio River on the Rochester-Monaca Bridge, and enters the borough of Rochester. In Rochester, Route 18 intersects with the PA Route 51/PA Route 65 overlap, and then PA Route 68 before turning northwest, west, then north-northwest. It then merges with PA Route 65 along the east bank of the Beaver River. The concurrency enters the borough of New Brighton, where Route 18 then leaves the concurrency over 2 miles (3.2 km) later, crosses the Beaver River, enters the city of Beaver Falls, and continues northward almost 2 miles (3.2 km). Route 18 briefly joins with PA Route 588, and then intersects with the southern terminus of PA Route 551 2 miles (3.2 km) later, just before leaving the city and entering the borough of Big Beaver. The route then passes through the borough of Homewood about 1.5 miles (2.4 km) later, and re-enters Big Beaver, where it interchanges with I-76 and The Pennsylvania Turnpike. Route 18 then passes through the borough of Koppel nearly 1.5 miles (2.4 km) later, where it intersects with PA Route 351, and then re-enters Big Beaver a third time before leaving Beaver County 1.3 miles (2.1 km) later.