NATIONAL FUEL GAS SUPPLY CORP — Integrity Assurance Notification

REASSESSMENT INTERVAL ABOVE 30% SMYSIn accordance with 49 CFR §192.939(a) and § 192.939(b), National Fuel Gas Supply Corporation (“NFG”) requests that the Pipeline Hazardous Materials Safety Administration (“PHMSA”) grant a 6-month extension of the 7-calendar year reassessment interval for its Line UNY 4.9 mile HCA segment from Vicksburg to Maple & North Forest, in the towns of Amherst, Erie County, New York and Tonawanda, Erie County, New York. The extension is requested because of a failed inline inspection (“ILI”). This inspection range was previously assessed via Ultrasonic In-Line Inspection (UT-ILI) in 2018, with reassessment due by December 31, 2025. NFG discussed this request with PHMSA and NYS Department of Public Service (“DPS”) staff on October 29, 2025.#