TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 105501 Notice Type: TSP Capacity Offering Subject: 2026 VENTURA SOUTH EXPANSION OPEN SEASON Critical: N Post Date/Time: 04/28/2026 11:00 AM Notice Status: Initiate For Gas Day(s): 04/28/2026 - 05/03/2026 Notice Effective Date/Time: 04/28/2026 11:00 AM Notice End Date/Time: 05/04/2026 08:59 AM Required Response Indicator Description: 5-No response required Notice Text: Northern held an expansion open season soliciting binding bids for firm TFX throughput service from receipts to delivery points in the area identified on the attached map for service commencing now or anytime in the future, which ended April 27, 2026. As a result of the open season, Northern received the following requests: Bidder Start Date End Date Winter MDQ Requested (Dth/day) Summer MDQ Requested (Dth/day) A 11/1/2028 10/31/2053 120,000 120,000 B 11/1/2028 10/31/2038 50,000 50,000 C 11/1/2028 10/31/2048 230,000 230,000 D 11/1/2028 10/31/2033 1,250 1,250 E 11/1/2028 10/31/2033 650 650 F 11/1/2028 10/31/2048 12,999 0 G 11/1/2028 10/31/2048 6,161 0 H 11/1/2027 10/31/2033 1,200 1,200 I 11/1/2028 10/31/2048 180,000 180,000 J 1/1/2029 3/31/2049 60,000 60,000 K 11/1/2028 3/31/2048 4,516 0 L 11/1/2028 10/31/2033 3,400 3,400 M 11/1/2026 10/31/2031 360 290 N 11/1/2028 10/31/2048 200,000 200,000 O 11/1/2029 10/31/2048 200,000 200,000 P 11/1/2028 10/31/2038 133,000 133,000 Q 11/1/2030 10/31/2050 26,000 26,000 R 11/1/2028 10/31/2033 2,500 2,500 S 11/1/2028 10/31/2033 400 400 T 10/1/2029 10/31/2030 82,000 82,000 U 11/1/2026 3/31/2031 3,900 0 V 11/1/2028 3/31/2033 7,200 0 Northern also received four requests for realignment and no requests to turnback capacity. Northern is currently working with the parties to evaluate capital requirements associated with construction of additional facilities related to the requests. Northern's FERC Gas Tariff provides for the posting of open season NPV results used to allocate capacity. Since capacity was not allocated NPV calculations were not necessary and therefore are not included. If you have any questions, please contact your marketing representative.