Live Chat I-15 Community Nearby Traffic Holter Dam (Water dam) 2024-05-11 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Holter Dam (Water Dam) Helena, MT 24.58 Canyon Creek, MT 30.74 Marysville, MT 35.64 Interstate highway exits close to Holter Dam (Water Dam) Exit 226, i15 3.60 Exit 228, i15 3.68 Exit 234, i15 10.42 Interstate highways close to Holter Dam (Water Dam) i15 map 3.60 i90 map 77.69 i94 map 313.74 State roads close to Holter Dam (Water Dam) MT 434 map 3.01 US 287 MT map 3.10 MT 200 map 21.74