TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 101853 Notice Type: Planned Service Outage Subject: PLANNED SERVICE OUTAGES - JANUARY 2026 THROUGH APRIL 2026 Location: MARKET AND FIELD AREA Critical: N Post Date/Time: 01/30/2026 10:20 AM Notice Status: Supersede Prior Notice: 100157 For Gas Day(s): 01/30/2026 - 04/30/2026 Notice Effective Date/Time: 01/30/2026 10:20 AM Notice End Date/Time: 05/01/2026 08:59 AM Required Response Indicator Description: 5-No response required Notice Text: Northern has scheduled the following service outages that will affect operating capacity within the months of January 2026 through February 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. Northern has placed a temporary bypass pipeline segment in-service near Willow River, Minnesota. As a result, capacity impacts for Carlton South (Group 811) have been updated for the Intraday 1 nomination cycle for Gas Day Friday, January 30, 2026. Market Area Allocation Group(s)/Point(s): Carlton South (Group 811) Location: Northern's mainline between North Branch, Minnesota, and Carlton, Minnesota Project Description: Pipeline maintenance Month: January 2026 through April 2026 Direction of Flow: Receipt: Carlton South (Group 811) Capacity Impact: Northern does not anticipate primary firm service will be impacted for Carlton South (Group 811). Field Area Allocation Group(s)/Point(s): Spraberry 12-inch (Group 601), Spraberry 16-inch (Group 1112) Location: Northern's compressor station in Midland, Texas Project Description: Station maintenance Month: January 2026 through April 2026 Direction of Flow: Delivery: Spraberry 12-inch (Group 601) and Spraberry 16-inch (Group 1112) Capacity Impact: Northern does not anticipate primary firm service will be impacted for Spraberry 12-inch (Group 601). Primary firm service will not be impacted for Spraberry 16-inch (Group 1112). Revision: Capacity impacts for Spraberry 12-inch (Group 601) have been updated for March 2026 through April 2026. Allocation Group(s)/Point(s): Seminole Subsystem (Group 598) Location: Northern's compressor station in Kermit, Texas Project Description: Station maintenance Month: March 2026 Direction of Flow: Delivery: Seminole Subsystem (Group 598) Capacity Impact: Primary firm service will not be impacted for Seminole Subsystem (Group 598). 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.