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NorthWestern Energy Reports No Known Damage from Montana Earthquake

Jul 06, 2017

Butte, Mont. – July 6, 2017 – A 5.8 magnitude earthquake with an epicenter north of Helena that was felt across much of NorthWestern Energy’s service territory caused no known damage to the utility’s electric and natural-gas system.

The earthquake was reported shortly after midnight on July 6. The epicenter was located about seven miles southeast of Lincoln, MT. The quake appears to have triggered a power outage in the Lincoln area that affected about 1,350 NorthWestern customers. The outage was reported at 12:30 a.m., the same time as the earthquake hit.

Power was restored to the Lincoln area about 1:15 a.m. Inspections at a substation about six miles east of Lincoln revealed no damage to the substation.

NorthWestern fielded a few calls from the Helena area reporting natural-gas odors shortly after the quake. Investigation found no damage to the natural-gas system.

Emergency officials in the Lincoln area are urging residents to inspect their homes and other property for possible damage caused by the earthquake, including pipes, water heaters and furnace exhaust systems. If damage to homes is suspected, contacting the appropriate professional to make repairs is advised.

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About NorthWestern Energy (NYSE: NWE)
NorthWestern Energy provides electricity and natural gas in the Upper Midwest and Northwest, serving approximately 709,600 customers in Montana, South Dakota and Nebraska. More information on NorthWestern Energy is available on the company's website at

Media Contact:
Butch Larcombe
(866) 622-8081



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