Live Chat I-70 Community Nearby Traffic Keasby Mattison Dam (Water dam) 2024-06-11 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Keasby Mattison Dam (Water Dam) Spring House, PA 2.54 Fort Washington, PA 3.93 Gwynedd Valley, PA 4.62 Interstate highway exits close to Keasby Mattison Dam (Water Dam) Exit 339, i76 4.37 Exit 343, i76 7.89 Exit 20, i476pa 8.50 Interstate highways close to Keasby Mattison Dam (Water Dam) i76 map 4.37 i476pa map 8.50 i276pa map 14.33 State roads close to Keasby Mattison Dam (Water Dam) PA 309 map 0.43 PENNSYLVANIA TURNPIKE map 4.37 US 202 PA map 4.94