Live Chat I-15 Community Nearby Traffic Lake Helena Dam (Water dam) 2024-05-13 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Lake Helena Dam (Water Dam) Fort Harrison, MT 5.94 East Helena, MT 12.27 Clancy, MT 13.18 Interstate highway exits close to Lake Helena Dam (Water Dam) Exit 193, i15 3.26 Exit 192b a, i15 3.32 Exit 187, i15 9.17 Interstate highways close to Lake Helena Dam (Water Dam) i15 map 3.26 i90 map 53.55 i94 map 293.41 State roads close to Lake Helena Dam (Water Dam) US 12 MT map 1.05 US 287 MT map 3.12 MT MT 282 map 6.96