Live Chat I-78 Community Nearby Traffic Watchung Lake Dam (Water dam) 2024-04-27 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Watchung Lake Dam (Water Dam) Plainfield, NJ 2.84 Berkeley Heights, NJ 3.85 Warren, NJ 4.90 Interstate highway exits close to Watchung Lake Dam (Water Dam) Exit 40, i78 1.50 Exit 41, i78 4.73 Exit 44, i78 6.03 Interstate highways close to Watchung Lake Dam (Water Dam) i78 map 1.50 i287nj map 9.43 i95 map 15.47 State roads close to Watchung Lake Dam (Water Dam) NJ CR 527 map 0.26 NJ CR 531 map 0.64 NJ SOMERSET 653 map 0.92