GYPSUM WALLBOARD 15 The following table sets forth certain information regarding our gypsum wallboard plants. Raw Materials and Fuel Supplies Our gypsum wallboard manufacturing operations use natural gas and electrical power. A significant portion of the Company's natural gas requirements for our gypsum wallboard plants are currently provided by three gas producers under gas-supply agreements expiring in August 2019 for New Mexico and October 2019 for South Carolina, Colorado, and Oklahoma. If the agreement ...