TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 101012 Notice Type: Force Majeure Subject: UPDATE 2: FORCE MAJEURE - CARLTON AREA Location: MARKET AREA Critical: Y Post Date/Time: 01/19/2026 04:30 PM Notice Status: Terminate Prior Notice: 100901 For Gas Day(s): 01/19/2026 - 01/21/2026 Notice Effective Date/Time: 01/19/2026 04:30 PM Notice End Date/Time: 01/21/2026 04:15 PM Required Response Indicator Description: 5-No response required Reason: Force Majeure Notice Text: Update 2: Northern has isolated the impacted pipeline segment of its mainline near Willow River, Minnesota, and has begun executing a repair plan. Northern is proceeding as quickly as possible under challenging weather conditions to mobilize the necessary materials, equipment and personnel to provide a temporary replacement of the impacted pipeline. At this time, Northern estimates that this work will be completed by mid-February. Updates will be provided as the repairs progress, with the next update coming no later than Wednesday, January 21, 2026. The operating capacity at the points outlined below remains unchanged at this time. Northern has called a Carlton Obligation at 50% for Gas Day Wednesday, January 21, 2026. Provided Northern continues to receive adequate supply at the points listed below, any Carlton penalty resulting from an allocation at the points listed below will be waived. To help ensure system integrity, Northern will not accept any incremental SMS requests for less than an annual term, the remaining term of an existing agreement or five years until otherwise noted. If you have any questions, contact your marketing or customer service representative. Update 1: Inspection of the impacted pipeline segment is ongoing. Northern is conducting an investigation into the cause of the incident and developing a return to service plan. At this time, a return to service date is not known. Updates will be provided as the repair plan develops, with the next update coming no later than Monday, January 19, 2026. At this time, the capacity impacts at the five points described below remain unchanged. Original Notice: Northern has experienced a Force Majeure event between the Hinckley, Minnesota, and Carlton, Minnesota, compressor stations located near Willow River, Minnesota, which requires operating capacity to be lowered to a combined 225,000 Dth/day effective immediately and until further notice at the following points. · GRLKS/NNG Carlton (POI 388) · GRLKS/NNG Wakefield (POI 21972) · GRLKS/NNG Grand Rapids (POI 78994) · Semco Marquette M-35 (POI 79374) · Semco Marquette Emergency Receipt (POI 79379) Incremental nominations at these points may not be accepted for the Intraday 3 nomination cycle for Gas Day Friday, January 16, 2026. Northern will be required to allocate the points to the reduced combined operating capacity of 225,000 Dth/day beginning with the Evening nomination cycle for Gas Day Saturday, January 17, 2026, and continuing until resolved. Northern has called a Carlton Obligation beginning with Gas Day Saturday, January 17, 2026. The Carlton Obligation will remain in effect. Provided Northern continues to receive the 225,000 Dth of supply at the points listed above, any Carlton penalty resulting from an allocation at the points listed above will be waived. Please continue to monitor Northern's website for updates. Please see Operationally Available Capacityon Northern's website for current flow information and the Market Area Group Allocation Mapsfor a list of impacted points.