Northern has scheduled the service outages that will affect operating capacity within the months of March 2022 through October 2022. 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: April 2022 through May 2022

Direction of Flow: Delivery

Capacity Impact: Primary firm service will not be impacted.

East Leg

Allocation Group(s)/Point(s): Waterloo East (Group 773), Earlville East (Group 487), Galena East (Group 463) and Belleville East (Group 488)

Location: Northern’s mainlines between the Ogden, Iowa compressor station and the Bluff Creek, Wisconsin delivery station

Project Description: Pipeline maintenance

Months: April 2022 through August 2022

Direction of Flow: Delivery

Capacity Impact: Primary firm service will not be impacted.

Market/Field Area Combined

Allocation Group(s)/Point(s): Field to Demarc (Group 831) and Beatrice North (Group 832)

Location: Northern’s mainlines between the Tescott, Kansas and Ogden, Iowa compressor stations

Project Description: Pipeline and station maintenance

Months: April 2022 through October 2022

Direction of Flow: Delivery

Capacity Impact: Primary firm service will not be impacted.

Revision: Capacity impacts for Field to Demarc (Group 831) have been added for May 2022 through October 2022. Capacity impacts for Beatrice North (Group 832) have been added for April 2022 through October 2022.

Field Area

Allocation Group(s)/Point(s): Beaver North (Group 1025), Beaver C System (Group 31), Pampa North (Group 1023), Brownfield North (Group 1022), Roger Mills Hemphill System (Group 14), PEPL/NNG Mullinville (POI 173), and ANR/NNG Greensburg (POI 179)

Location: Northern’s mainline between Clifton, Kansas and Brownfield, Texas, and station maintenance at the Gaines County, Claude, and Pampa compressor stations located in Texas

Project Description: Pipeline and station maintenance

Months: April 2022 through September 2022

Direction of Flow: Delivery for Beaver North (Group 1025), Pampa North (Group 1023), Brownfield North (Group 1022), and ANR/NNG Greensburg (POI 179), and receipt for Beaver C System (Group 31), Roger Mills Hemphill System (Group 14), and PEPL/NNG Mullinville (POI 173)

Capacity Impact: Northern anticipates primary firm service will be impacted for Brownfield North (Group 1022). Northern does not anticipate primary firm service will be impacted for Pampa North (Group 1023) and PEPL/NNG Mullinville (POI 173). Primary firm service will not be impacted for Beaver North (Group 1025), Beaver C System (Group 31), Roger Mills Hemphill System (Group 14), and ANR/NNG Greensburg (POI 179).

Revision: Capacity impacts have been updated for April 2022 through July 2022 and September 2022.

Allocation Group(s)/Point(s): Sunray Low (Group 10) and Sunray High (Group 32)

Location: Sunray, Texas compressor station

Project Description: Station maintenance

Months: May 2022

Direction of Flow: Receipt

Capacity Impact: Primary firm service will not be impacted.

Allocation Group(s)/Point(s): Mitchell to Gaines (Group 825) and Seminole Subsystem (Group 598)

Location: Northern’s mainline south of Brownfield, Texas and station maintenance at the Gaines County, Texas compressor station

Project Description: Station and pipeline maintenance

Months: May 2022

Direction of Flow: Receipt for Mitchell to Gaines (Group 825) and both receipt and delivery for Seminole Subsystem (Group 598)

Capacity Impact: Northern anticipates primary firm service will be impacted for Mitchell to Gaines (Group 825). Northern does not anticipate primary firm service will be impacted for Seminole Subsystem (Group 598).

Allocation Group(s)/Point(s): Spraberry Station (Group 602), Spraberry 12-inch (Group 601), and Spraberry 16-inch (Group 1112)

Location: Spraberry, Texas compressor station

Project Description: Station maintenance

Months: May 2022

Direction of Flow: Receipt for Spraberry Station (Group 602) and delivery for Spraberry 12-inch (Group 601) and Spraberry 16-inch (Group 1112)

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

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.