Since the last USGS assessment of undiscovered oil and gas resources in the Bossier Formation, exploration drilling by industry has revealed deep, highly overpressured shale formations, warranting a new assessment. Since production began, the Bossier Formation has produced 3.8 trillion cubic feet of gas, equal to nearly six weeks of U.S. consumption at the record-high 2025 level. The Gulf Coast has long been one of the most abundant sources of U.S. energy. The organic-rich shales of the Bossier Formation are produced from up to 18,000 feet below the surface, at greater depths than other resources in the Gulf Coast. New plays, such as the Bossier Western Shale Gas Assessment Unit, sometimes referred to by industry as “Western Haynesville”, or “Waynesville”, show that drilling into deeper, higher-pressured reservoirs can result in more resources than previously thought.  “The U.S.…