Pennsylvania Route 173
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| Maintained by PennDOT | ||||
| Length: | 45.7 mi (73.5 km) | |||
| Major junctions | ||||
| South end: |
 PA 8 near Slippery Rock
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 I-80 near Grove City
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| North end: |
 PA 27 near Cochranton
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| Location | ||||
| Counties: | Butler, Mercer, Crawford | |||
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Pennsylvania Route 173 (PA 173) is located in western Pennsylvania, running from PA Route 8 4 miles (6.4 km) south of Slippery Rock in Butler County, to 7.5 miles (12.1 km) north of Cochranton in Crawford County.
PA 173 is designated as part of Washington’s Trail between its southern terminus at PA Route 8 and Slippery Rock.
From the village of Stone House at PA Route 8, PA 173 heads north-northeast in Butler County about 4 miles (6.4 km) to the borough of Slippery Rock, home to Slippery Rock University. Near the north end of town, the route intersects with PA 108 at the southern terminus of PA Route 258. Routes 108 and 173 overlap, traveling northeasterly for 0.3 miles (0.48 km), where the concurrency ends and PA 173 turns northward. About 3 miles (4.8 km) later, the route crosses the county line.
After entering Mercer County, PA 173 continues northerly almost 3.5 miles (5.6 km) to the borough of Grove City, the site of Wendall August Forge and Grove City College. The route intersects with PA Route 58, and the two overlap northeastward 0.2 miles (0.32 km). This concurrency ends at the intersection of PA Route 208, where Routes 173 and 208 concurrency northward – for about 0.33 miles (0.53 km), the northbound and southbound lanes run on parallel one-way streets through the downtown area. About 0.4 miles (0.64 km) later, the concurrency ends, PA 173 continues north, and leaves the borough. The route interchanges with I-80 about 2.5 miles (4.0 km) later, and then intersects with PA Route 965 about 6 miles (9.7 km) after that at the village of Perrine’s Corners.
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Wikipedia