TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 103796 Notice Type: Computer System Status Subject: UPDATE 1: FLOWING GAS BUSINESS APPLICATION INTERRUPTION Critical: N Post Date/Time: 03/18/2026 04:00 PM Notice Status: Supersede Prior Notice: 103788 For Gas Day(s): 03/18/2026 Notice Effective Date/Time: 03/18/2026 04:00 PM Notice End Date/Time: 03/19/2026 08:59 AM Required Response Indicator Description: 5-No response required Notice Text: Update 1: The interruption to the Flowing Gas application has been resolved and customers are now able to retrieve invoices and reports. If you have any questions, please contact your customer service or marketing representative. Original Notice: Northern is currently experiencing a service interruption that is preventing customer access to its Flowing Gas business application. As a result, customers are unable to view accounting reports. We apologize for any inconvenience this may cause and will provide an update as soon as system availability is restored. If you have any questions, please contact your customer service representative.