TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 104164 Notice Type: Planned Service Outage Subject: PLANNED SERVICE OUTAGES - MARCH 2026 THROUGH OCTOBER 2026 Location: MARKET AND FIELD AREA Critical: N Post Date/Time: 03/31/2026 01:24 PM Notice Status: Supersede Prior Notice: 104079 For Gas Day(s): 03/31/2026 - 10/31/2026 Notice Effective Date/Time: 03/31/2026 01:24 PM Notice End Date/Time: 11/01/2026 08:59 AM Required Response Indicator Description: 5-No response required Notice Text: Northern has scheduled the service outages that will affect operating capacity within the months of March 2026 through October 2026. Please review the Planned Service Outage Summaryfor detailed information related to each outage. A brief description of the most recent change(s) to the Planned Service Outage Summary follows. Market/Field Area Combined Allocation Group(s)/Point(s): Field to Demarc (Group 831) and Beatrice North (Group 832) Location: Northern's pipelines and compressor stations located between the Mullinville, Kansas, and Ogden, Iowa, compressor stations Project Description: Compressor station and pipeline maintenance Month: April 2026 through October 2026 Direction of Flow: Delivery: Field to Demarc (Group 831) and Beatrice North (Group 832) Capacity Impact: Northern does not anticipate primary firm service will be impacted for Beatrice North (Group 832) and Field to Demarc (Group 831). Revision: Capacity impacts for Field to Demarc (Group 831) and Beatrice North (Group 832) have been updated for April 2026. Field Area Allocation Group(s)/Point(s): Beaver North (Group 1025) Location: Northern's compressor station located in Beaver, Kansas Project Description: Compressor station maintenance Month: April 2026 through June 2026 Direction of Flow: Delivery: Beaver North (Group 1025) Capacity Impact: Primary firm service will not be impacted for Beaver North (Group 1025). Revision: Capacity impacts for Beaver North (Group 1025) have been included for April 2026. Allocation Group(s)/Point(s): PEPL/NNG Mullinville (POI 173) and ANR/NNG Greensburg (POI 179) Location: Northern's compressor station located in Mullinville, Kansas Project Description: Compressor station maintenance Month: April 2026 through June 2026 Direction of Flow: Delivery: ANR/NNG Greensburg (POI 179) Receipt: 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 ANR/NNG Greensburg (POI 179). Revision: Capacity impacts for PEPL/NNG Mullinville (POI 173) and ANR/NNG Greensburg (POI 179) have been included for April 2026. Please see Operationally Available Capacityon Northern's website for current flow information and the Field Area Group Allocation Mapsand Market Area Group Allocation Mapsfor a list of impacted points. If you have any questions, contact your customer service or marketing representative.