Live Chat I-80 Community Nearby Traffic Johnston Dam (Water dam) 2024-06-11 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Johnston Dam (Water Dam) Hilliards, PA 5.43 Clintonville, PA 9.60 Boyers, PA 9.68 Interstate highway exits close to Johnston Dam (Water Dam) Exit 42, i80 6.54 Exit 35, i80 8.50 Exit 45, i80 11.62 Interstate highways close to Johnston Dam (Water Dam) i80 map 6.54 i79 map 28.35 i76 map 55.00 State roads close to Johnston Dam (Water Dam) PA 38 map 0.04 PA 308 map 7.11 PA 138 map 9.83