NorthWestern : Substation upgrade requires early morning outages for Twin Bridges and Sheridan area NorthWestern Energy customers in April and May

Substation upgrade requires early morning outages for Twin Bridges and Sheridan area NorthWestern Energy customers in April and May

BUTTE, MONT. - April 19 , 2021 - NorthWestern Energy is upgrading the Sheridan Substation, and as part of this work the following early morning power outages have been scheduled. These outages will only affect NorthWestern Energy customers.

Outages affecting all Twin Bridges area NorthWestern Energy customers:

Outage 1:

When: April 27 (Tuesday morning)
Outage Time: Beginning at 2 a.m., lasting approximately 30 minutes.
Customers Affected: All Twin Bridges area customers will experience this outage.

Outage 2:

When: April 30 (Friday morning)
Outage Time: Beginning at 2 a.m., lasting approximately 30 minutes.
Customers Affected: All Twin Bridges area customers will experience this outage.

Outage 3:

When: May 19 (Wednesday morning)
Outage Time: Beginning at 2 a.m., lasting approximately 30 minutes.
Customers Affected: All Twin Bridges area customers will experience this outage.

Outage 4:

When: May 19 (Wednesday morning)
Outage Time: Beginning at 5 a.m., lasting approximately 30 minutes.
Customers Affected: All Twin Bridges area customers will experience this outage.

Outage affecting all Sheridan area NorthWestern Energy customers:

When: May 19 (Wednesday Morning)
Outage Time: Starting at 2 a.m., lasting approximately 3-hours.
Customers Affected: All Sheridan area customers will experience this outage.

An automated phone message will be sent to customers prior to the planned power outages.

The outages allow line crews to safely perform substation work. This project will enhance service reliability for the 1,400 customers in Twin Bridges and Sheridan served by the Sheridan Substation.

NorthWestern Energy appreciates the patience of the customers who will be impacted.

For more information, contact NorthWestern Energy Customer Contact Center at 888-467-2669.

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About NorthWestern Energy (Nasdaq: NWE)

NorthWestern provides electricity and / or natural gas to approximately 743,000 customers in Montana, South Dakota, and Nebraska. We have generated and distributed electricity in South Dakota and distributed natural gas in South Dakota and Nebraska since 1923 and have generated and distributed electricity and distributed natural gas in Montana since 2002. More information on NorthWestern is available on the company's website at www.northwesternenergy.com.

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