Northern has scheduled the service outages that will affect operating capacity within the months of June 2021 through October 2021. Please review the Planned Service Outage Summary for detailed information related to each outage.

A brief description of the most recent change(s) to the Planned Service Outage Summary follows.

Market Area

Ogden North

Allocation Group(s)/Point(s): Ventura South (Group 735)

Location: Northern’s mainlines between the Ogden, Iowa compressor station and the NBPL/NNG Ventura Interconnect (POI 192)

Project Description: Pipeline maintenance

Months: June 2021 through September 2021

Direction of Flow: Delivery

Capacity Impact: Northern does not anticipate primary firm service will be impacted.

Revision: Capacity impacts have been added for August 2021 and September 2021.

Field Area

Allocation Group(s)/Point(s): Beaver North (Group 1025), PEPL/NNG Mullinville (POI 173) and ANR/NNG Greensburg (POI 179)

Location: Northern’s mainlines between the Mullinville, Kansas and Macksville, Kansas compressor stations, and station modifications at the Beaver, Oklahoma and Mullinville, Kansas compressor stations

Project Description: Pipeline and station maintenance

Months: June 2021 through October 2021

Direction of Flow: Delivery for Beaver North (Group 1025) and ANR/NNG Greensburg (POI 179), and receipt for PEPL/NNG Mullinville (POI 173)

Capacity Impact: Northern does not anticipate primary firm service will be impacted for PEPL/NNG Mullinville (POI 173). Primary firm service will not be impacted for Beaver North (Group 1025) and ANR/NNG Greensburg (POI 179).

Revision: Capacity impacts have been updated for Beaver North (Group 1025) and PEPL/NNG Mullinville (POI 173) for July 2021 through September 2021.

Allocation Group(s)/Point(s): Pampa North (Group 1023), Brownfield North (Group 1022) and Seminole Subsystem (Group 598)

Location: Northern’s mainlines between the Gaines County, Texas and Beaver, Oklahoma compressor stations

Project Description: Station and pipeline maintenance

Months: June 2021, July 2021, and September 2021

Direction of Flow: Delivery

Capacity Impact: Primary firm service will not be impacted. Northern does not anticipate primary firm service will be impacted for Seminole Subsystem (Group 598) for September 2021.

Revision: Capacity impacts have been updated for July 2021 and added for Seminole Subsystem (Group 598) for July 2021 and September 2021.

Allocation Group(s)/Point(s): Spraberry Station (Group 602) and Spraberry 12-inch (Group 601)

Location: Northern’s Spraberry, Texas compressor station

Project Description: Station Maintenance

Months: June 2021 through September 2021

Direction of Flow: Receipt for Spraberry Station (Group 602) and delivery for Spraberry 12-inch (Group 601)

Capacity Impact: Northern anticipates primary firm service will be impacted.

Revision: Capacity impacts have been added for Spraberry Station (Group 602) for August 2021 and September 2021. Capacity impacts have been added for Spraberry 12-inch (Group 601) for July 2021.

Allocation Group(s)/Point(s): Sunray Low (Group 10), Sunray High (Group 32), Beaver C System (Group 31) and ETC Sunray Plant (POI 58676)

Location: Northern’s Sunray, Texas compressor station

Project Description: Station maintenance

Months: June 2021 through September 2021

Direction of Flow: Receipt

Capacity Impact: Northern anticipates primary firm service will be impacted for Sunray Low (Group 10) and ETC Sunray Plant (POI 58676). Primary firm service will not be impacted for Sunray High (Group 32) and Beaver C System (Group 31).

Revision: Capacity impacts have been added for August 2021 through September 2021.

Please see Operationally Available Capacity on Northern’s website for current flow information and the Field Area Group Allocation Maps and Market Area Group Allocation Maps for a list of impacted points.