TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 098497 Notice Type: TSP Capacity Offering Subject: RESULTS: OPEN SEASON FOR GENERALLY AVAILABLE FIELD AREA BACKHAUL DELIVERIES Critical: N Post Date/Time: 11/13/2025 09:00 AM Notice Status: Initiate For Gas Day(s): 11/13/2025 - 11/19/2025 Notice Effective Date/Time: 11/13/2025 09:00 AM Notice End Date/Time: 11/19/2025 05:00 PM Required Response Indicator Description: 5-No response required Notice Text: Northern held an open season forbackhaul throughput service from receipt points located in Northern's Field Area MIDs 1-16B for deliveries in the Field Area MIDs 1-16A. The open season began Tuesday, October 28, 2025, and concluded at 2 p.m. CCT on Wednesday, November 12, 2025. Northern received binding bids that were evaluated pursuant to the terms of the open season. The net present value analysis of the customers' bids is shown below: Bid Number Start Date End Date Season Total Volume Bid Bid Rate Rate Schedule Primary Receipt Location(s) Primary Delivery Location(s) Aggregate Bid NPV Per Unit* 1 4/1/27 3/31/34 Annual 25,000 Max TFX 37654 71395, 79038 $584.55 2 12/1/26 3/31/30 Annual 2,500 Max TFX 37654 PUC** $337.57 3 1/1/27 3/31/30 Annual 2,500 Max TFX 37654 PUC** $325.15 4 2/1/27 3/31/30 Annual 10,000 Max TFX 37654 PUC** $312.82 5 3/1/27 3/31/30 Annual 15,000 Max TFX 37654 PUC** $300.56 6 4/1/27 3/31/30 Annual 26,000 Max TFX 37654 PUC** $288.38 7 5/1/27 3/31/30 Annual 28,000 Max TFX 37654 PUC** $281.65 8 6/1/27 3/31/30 Annual 28,000 Max TFX 37654 PUC** $274.97 9 7/1/27 3/31/30 Annual 28,000 Max TFX 37654 PUC** $268.32 *FERC Interest Rate 7.50% **Point Under Construction No realignment requests were received. If you have any questions, please contact your marketing representative.