Southard Mud Disposal Inc Po Box 101 Southard, OK 73770 Phone : (580) 822-4000 Post Office - Southard 300 Highway 51a Southard, OK 73770 Phone : (580) 822-3483 United States Gypsum Co Highway 51a Southard, OK 73770 Phone : (580) 822-6100 Southard Cafe Highway 51 & Highway 51a Southard, OK 73770 Phone : (580) 822-4890