TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 105114 Notice Type: Computer System Status Subject: FLOWING GAS BUSINESS APPLICATION INTERRUPTION Critical: N Post Date/Time: 04/20/2026 12:06 PM Notice Status: Initiate For Gas Day(s): 04/20/2026 Notice Effective Date/Time: 04/20/2026 12:05 PM Notice End Date/Time: 04/21/2026 08:59 AM Required Response Indicator Description: 5-No response required Notice Text: Northern is currently experiencing a service interruption that is causing intermittent 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.