Live Chat I-15 Community Nearby Traffic Northern Pacific Reservoir Dam (Water dam) 2024-05-12 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Northern Pacific Reservoir Dam (Water Dam) Helena, MT 11.85 Clancy, MT 13.13 Fort Harrison, MT 17.62 Interstate highway exits close to Northern Pacific Reservoir Dam (Water Dam) Exit 187, i15 6.41 Exit 192b a, i15 9.02 Exit 193, i15 10.14 Interstate highways close to Northern Pacific Reservoir Dam (Water Dam) i15 map 6.41 i90 map 65.40 i94 map 281.34 State roads close to Northern Pacific Reservoir Dam (Water Dam) US 287 MT map 1.01 MT MT 282 map 3.44 MT S 284 map 7.15