Live Chat I-78 Community Nearby Traffic Round Valley South Dam (Water dam) 2024-05-27 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Round Valley South Dam (Water Dam) Three Bridges, NJ 6.39 Whitehouse Station, NJ 6.78 Flemington, NJ 7.01 Interstate highway exits close to Round Valley South Dam (Water Dam) Exit 20b a, i78 7.89 Exit 18, i78 8.14 Exit 17, i78 8.42 Interstate highways close to Round Valley South Dam (Water Dam) i78 map 7.89 i287nj map 17.26 i95 map 31.99 State roads close to Round Valley South Dam (Water Dam) NJ CR 523 map 1.62 NJ 31 map 2.48 US 202 NJ map 6.23