The USGS Central Region Energy Team assesses oil and gas resources of the United States. The onshore and State water areas of the United States comprise 71 provinces. Within these provinces, Total Petroleum Systems are defined and Assessment Units are defined and assessed. Each of these provinces is defined geologically, and most province boundaries are defined by major geologic changes. The Bend Arch-Fort Worth Basin Province is located in north central Texas and south western Oklahoma, encompassing all or parts of Archer, Bandera, Baylor, Blanco, Bosque, Brown, Burnet, Callahan Clay, Coleman, Collin, Comanche, Concho, Cooke, Coryell, Dallas, Denton, Eastland, Ellis, Erath, Foard, Gillespie, Grayson, Hardeman, Harmon, Haskell, Hill, Jack, Jackson, Johnson, Jones, Kendall, Kerr, Kimble, Know, Lampasas, Llano, Mason, McCulloch, McLennan, Menard, Mills, Montague, Palo Pinto, Parker, Real, Runnels, San Saba, Shackelford, Somervell, Stephens, Tarrant, Taylor, Throckmorton, Tillman, Wichita, Wilbarger, Wise, Young Counties in Texas and Harmon, Jackson and Tillman Counties in Oklahoma. The main population centers within the study area are Dallas and Fort Worth, Texas. The main highway, I-20, generally traverses the area from east to west and I-35 traverses the eastern edge of the Province from north to south. The Colorado River, Brazos River and Pease River (RED RIVER) and their tributaries drain the area. For this study the Bend Arch-Fort Worth Province also includes Hardeman Basin.