TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 106034 Notice Type: Planned Service Outage Subject: PLANNED SERVICE OUTAGES - MAY 2026 THROUGH OCTOBER 2026 Location: MARKET AND FIELD AREA Critical: N Post Date/Time: 05/07/2026 11:22 AM Notice Status: Supersede Prior Notice: 104531 For Gas Day(s): 05/07/2026 - 10/31/2026 Notice Effective Date/Time: 05/07/2026 11:21 AM 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 April 2026 through October 2026. 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. Northern completed pipeline maintenance at the Bushton, Kansas compressor station. As a result, capacity impacts for Holcomb Burdett (Group 5) have been updated for the Intraday 2 nomination cycle for Gas Day Thursday, May 7, 2026. Field Area Allocation Group(s)/Point(s): Holcomb Burdett (Group 5) Location: Northern's compressor station located in Bushton, Kansas Project Description: Compressor station maintenance Month: May 2026 Direction of Flow: Delivery: Holcomb Burdett (Group 5) Receipt: Holcomb Burdett (Group 5) Revision: Capacity impacts for Holcomb Burdett (Group 5) have been updated for May 2026. Please see Operationally Available Capacity on Northern's website for current flow information and the Field Area Group Allocation Maps andMarket Area Group Allocation Maps for a list of impacted points. If you have any questions, contact your customer service or marketing representative.