TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 091998 Notice Type: Planned Service Outage Subject: PLANNED SERVICE OUTAGES - JUNE 2025 THROUGH OCTOBER 2025 Location: MARKET AND FIELD AREA Critical: N Post Date/Time: 06/23/2025 10:10 AM Notice Status: Terminate Prior Notice: 091794 For Gas Day(s): 06/23/2025 - 06/24/2025 Notice Effective Date/Time: 06/23/2025 10:10 AM Notice End Date/Time: 06/24/2025 11:03 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 June 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 has canceled the planned maintenance impacting OneOk Westex Moore County (POI 71247). As a result, capacity impacts for OneOk Westex Moore County have been removed for Gas Day June 24, 2025. Field Area Allocation Group(s)/Point(s): OneOk Westex Moore County (POI 71247) Location: Northerns meter station in Moore County, Texas Project Description: Station maintenance Months: June 2025 Direction of Flow: Delivery: OneOk Westex Moore County (POI 71247) Capacity Impact: Primary firm service will not be impacted for OneOk Westex Moore County (POI 71247). Revision: Capacity impacts for OneOk Westex Moore County (POI 71247) have been removed for June 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.