TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 100680 Notice Type: Computer System Status Subject: BUSINESS APPLICATIONS INTERRUPTION Critical: N Post Date/Time: 01/10/2026 02:34 PM Notice Status: Terminate For Gas Day(s): 01/10/2026 Notice Effective Date/Time: 01/10/2026 02:34 PM Notice End Date/Time: 01/10/2026 06:12 PM Required Response Indicator Description: 5-No response required Notice Text: Northern is experiencing intermittent service interruption limiting access to its business applications, including the Throughput Management System (TMS), Capacity Release System, Flowing Gas and ODI. Northern regrets any inconvenience this may cause and, if necessary, will extend the Evening nomination cycle deadline for Gas Day Sunday, January 11, 2026, to provide customers with additional time to complete their nominations. An update will be provided once system availability is restored. If you have any questions, please contact your customer service representative.