TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 092404 Notice Type: TSP Capacity Offering Subject: PERMIAN BASIN AREA EXPANSION OPEN SEASON Critical: N Post Date/Time: 07/02/2025 09:00 AM Notice Status: Initiate For Gas Day(s): 07/02/2025 - 07/22/2025 Notice Effective Date/Time: 07/02/2025 09:00 AM Notice End Date/Time: 07/22/2025 05:00 PM Required Response Indicator Description: 5-No response required Notice Text: Northern Natural Gas Company (Northern) is hereby soliciting binding bids for firm throughput service to delivery points located in Northern's Field Area for service commencing immediately or any time in the future. Northern anticipates the construction of facilities will be required to provide the requested service (Project). Northern anticipates the earliest a Project could be completed is June 1, 2026, subject to final scope determination, regulatory approvals and construction. Any generally available capacity will be used to reduce the cost of construction of the Project. Interested customers may request firm throughput service by submitting a signed binding Bid Form. Customers requesting service are responsible for ensuring arrangements have been made for any capacity necessary on any upstream or downstream pipeline for their volumes to be confirmed during the nomination and scheduling process. Field Area receipt and delivery points located in MIDs 3 through 6 are included in this open season. (see attached map for details). If sufficient customer interest indicates a Project is feasible, Northern will develop the Project subject to certain conditions including, but not limited to, securing contractual commitments for incremental firm throughput service with rates and terms sufficient to justify the Project economics, and receipt of all necessary regulatory approvals. The actual in-service date of the Project or any portion thereof, is subject to the timing of regulatory approvals and the subsequent construction required. Northern reserves the right to include in the Project only service and facilities that Northern determines can reasonably be approved and in service on a timely basis. Expansion capacity is anticipated to be completed for service beginning no sooner than June 1, 2026. Open Season Timing The open season commences on July 2, 2025, and ends at 5:00 p.m. CCT on July 22, 2025. To be considered in the open season, customer's signed binding Bid Form must be received by the close of the open season. If you have any questions, please contact your Account Manager or Jason Thomsen at (402) 398-7469. Open Season Procedures Submit your binding Bid Formto Northern either via facsimile to (402) 398-7413 or e-mail to NNGOpenSea@nngco.com . The Bid Form must include the requested volume, receipt point, delivery point(s), rate and term. Bids must have a uniform monthly maximum daily quantity (MDQ) across the term. Field Area receipt points located in MIDs 3 through 6 will be considered in this open season. Depending on the delivery points selected in the open season, availability of a particular receipt point may be limited. The reservation rate bid is binding for firm throughput service. The term of service for any bid must end on March 31 or October 31. Northern reserves its right not to accept any bid at less than its maximum rates. 4. The rates necessary for service may change based on the actual cost of the Project. The actual costs will include any reservation charge credit paid by Northern to other customers as a result of the construction of the Project. A reservation rate higher than the reservation rate bid for firm service may be necessary to justify the Project economics. The term of service may be extended to cover construction costs. Alternatively, customers may pay an agreed upon reservation rate and provide a contribution in aid of construction for its proportionate share of the construction costs. In the event a higher reservation rate than the reservation rate bid or a longer term is required, the customer will be informed in writing of such reservation rate and term. Within ten (10) calendar days upon receipt of the notification from Northern of a higher reservation rate or longer term, the customer shall provide written notice to Northern whether it is terminating its participation in the Project or agreeing to proceed with a Project at the higher reservation rate or longer term. If the customer fails to respond, the customer will be deemed to have terminated its participation. 5. Customer must sign an agreement for construction of the necessary facilities for the Project within 30 calendar days once tendered by Northern. The agreement will be designed for the service requested by each customer, and obligates customer for its allocated share of capital costs. Northern and customer may agree to other terms specific to the facilities or service provided pursuant to this open season. Northern may consider contingencies in the bids but reserves the right to reject any bid(s) which is subject to contingencies. If construction is required to provide service, any transportation contract will be subject to and contingent upon the completion of facilities. Transportation ser vice agreements must be executed by customers, and returned to Northern, within 30 days of tender or prior to service commencing. Northern and customer may agree to amend the service agreement o r other related contracts , as allowed by Northern's Tariff, at any time after award of the capacity. Northern and customers may agree to other terms specific to the facilities or service provided pursuant to this open season. Realignments may be considered as part of this open season. Customers will be responsible for the construction costs for any facility modifications required to provide any requested realignment. Customer(s) must meet the creditworthiness provisions of Northern's Tariff. Upon request by Northern, customer shall provide appropriate credit assurance, including credit assurance for the construction of facilities, within 10 calendar days of Northern's request. The results of this open season will be posted on Northern's website. Solicitation of Turn Back Capacity Firm customers who currently hold capacity in Northern's Field Area that may be used to reduce construction must notify Northern in writing if they wish to permanently relinquish their capacity. The written notification must be received by Northern prior to the expiration of the open season in order for Northern to determine the need for, extent and feasibility of the use of such capacity for the proposed Project.