TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 090105 Notice Type: Planned Service Outage Subject: PLANNED SERVICE OUTAGES - MAY 2025 THROUGH OCTOBER 2025 Location: MARKET AND FIELD AREA Critical: N Post Date/Time: 05/16/2025 10:45 AM Notice Status: Supersede Prior Notice: 089972 For Gas Day(s): 05/16/2025 - 10/31/2025 Notice Effective Date/Time: 05/16/2025 10:45 AM Notice End Date/Time: 11/01/2025 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 May 2025 through October 2025. 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 rescheduled pipeline and compressor station maintenance impacting Beaver North (Group 1025), Beaver C and Beaver North (Group 1080), Brownfield North (Group 1022), Pampa North (Group 1023), Beaver C System (Group 31) and Spraberry Station (Group 602). As a result, capacity impacts for Spraberry Station (Group 602) have been removed for May 2025. Additionally, capacity impacts for Beaver North (Group 1025), Beaver C and Beaver North (Group 1080), Brownfield North (Group 1022), Pampa North (Group 1023) and Beaver C System (Group 31) have been updated for July 2025 and removed for August 2025. Field Area Allocation Group(s)/Point(s): Spraberry 12-inch (Group 601), Spraberry 16-inch (Group 1112) and Spraberry Station (Group 602) Location: Northern's compressor station in Midland, Texas Project Description: Station maintenance Month: May 2025 and July 2025 Direction of Flow: Delivery: Spraberry 12-inch (Group 601) and Spraberry 16-inch (Group 1112) Receipt: Spraberry Station (Group 602) Capacity Impact: Northern anticipates primary firm service will be impacted for Spraberry 12-inch (Group 601), Spraberry 16-inch (Group 1112) and Spraberry Station (Group 602). Revision: Capacity impacts for Spraberry Station (Group 602) have updated for May 2025. Allocation Group(s)/Point(s): Beaver North (Group 1025), Beaver C and Beaver North (Group 1080), Brownfield North (Group 1022), Pampa North (Group 1023), Mitchell to Gaines (Group 825) and Beaver C System (Group 31) Location: Northern's compressor stations and mainline between Florey, Texas, and Mullinville, Kansas Project Description: Pipeline and station maintenance Month: May 2025 through August 2025 Direction of Flow: Receipt: Beaver C System (Group 31) and Mitchell to Gaines (Group 825) Delivery: Beaver North (Group 1025), Beaver C and Beaver North (Group 1080), Brownfield North (Group 1022) and Pampa North (Group 1023) Capacity Impact: Northern anticipates primary firm service will be impacted for Beaver C and Beaver North (Group 1080), Brownfield North (Group 1022), Pampa North (Group 1023) and Mitchell to Gaines (Group 825). Primary firm service will not be impacted for Beaver North (Group 1025) and Beaver C System (Group 31). Revision: Capacity impacts for Beaver North (Group 1025), Beaver C and Beaver North (Group 1080), Brownfield North (Group 1022), Pampa North (Group 1023) and Beaver C System (Group 31) have been updated for July 2025 and August 2025. 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.