The volume of recoverable,salable gas reserves committed to, controlled by, or possessed by the reporting pipeline company and used for acts and services for which both the seller and the company have received certificate authorization fromthe Federal Energy Regulatory Commission (FERC). Reserves include both company-owned reserves (including owned gas in underground storage),reserves under contract from independent producers, and short-term and emergency supplies from the intrastate market. Gas volumes under contract from other interstate pipelines are not included as reserves,but may constitute part or all of a company's gas supply.