TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 109588 Notice Type: Scheduling Alert Subject: UPDATE 2: CAPACITY UPDATE VIKING/NNG PIERZ (61667) AND VIKING/NNG POLK (62983) Critical: N Post Date/Time: 07/15/2026 05:40 PM Notice Status: Supersede Prior Notice: 109185 For Gas Day(s): 07/15/2026 - 10/31/2026 Notice Effective Date/Time: 07/15/2026 05:40 PM Notice End Date/Time: 11/01/2026 08:59 AM Required Response Indicator Description: 5-No response required Notice Text: Update 2: The maintenance outage affecting North Branch was completed ahead of schedule, as a result, effective immediately through July 31, 2026, Northern is hereby releasing interim capacity of 33,697 Dth/day for firm throughput service from Viking/NNG Pierz Inter (POI 61667). Northern will provide more details surrounding the open season for capacity starting August 1, 2026, in a subsequent TSP Capacity Offering open season notice. Update 1: Northern would like to inform customers of an adjustment to operational receipt capacities at Viking/NNG Pierz Inter (POI 61667). Northern has completed modifications to its system and has returned the operational capacity at the Viking/NNG Pierz Inter (POI 61667) interconnect to 75,000 Dth/day year-round. Due to upcoming planned service outages creating capacity constraints, Northern will not be contracting incremental firm capacity in the North Branch Receipt Points Group (Group 1151R) during the planned service outage impacting the North Branch Receipt Points Group in July 2026. Northern is hereby announcing an open season for all available Viking/NNG Pierz Inter (POI 61667) receipt capacity for service commencing at the conclusion of the planned service outage impacting the North Branch Receipt Points Group (1151R). Northern will provide further open season details in a future notice approximately two weeks prior to the close of the open season. The duration of this open season will not exceed 60 business days. Original Notice: Northern would like to inform customers of an upcoming adjustment to operational receipt capacities at Viking/NNG Pierz Inter (POI 61667) and Viking/NNG Polk ITE (POI 62983). Due to physical load profiles within the Pierz Region Receipt Allocation Group (Group 1120) consistently falling below the operational capacity at the Viking/NNG Pierz Inter (POI 61667) interconnect, and operational constraints preventing physical flow outside the allocation group, Northern will be reducing the operational capacity at the Viking/NNG Pierz Inter (POI 61667) interconnect during the summer months. Similarly, due to physical load profiles within the Ladysmith Branch Line Allocation Group (Group 1037), Northern will be raising the operational capacity at the Viking/NNG Polk ITE (POI 62983) interconnect during the shoulder months of October and April. Effective October 1, 2025, the following operational capacities will be established as the new long-term operational capacities for Viking/NNG Pierz Inter (POI 61667) and Viking/NNG Polk ITE (POI 62983). POI 61667 62983 Viking/NNG Pierz Inter Viking/NNG Polk ITE October 50,000 6,000 November 75,000 10,000 December 75,000 10,000 January 75,000 10,000 February 75,000 10,000 March 75,000 10,000 April 50,000 6,000 May 40,803 3,500 June 40,803 3,500 July 40,803 3,500 August 40,803 3,500 September 40,803 3,500 If you have any questions, contact your customer service or marketing representative.