Missouri State Of--conservation Department, Irwin 745 Nw 20th Ln Sheldon, MO 64784 Phone : (417) 884-2526 Business Category Government Offices-State Government Offices State & Local Government Offices & Public Schools State Of Mo Conservation 745 Nw 20th Ln Irwin, MO 64759 Phone : (417) 884-2526 Business Category Government Offices-State Government Offices State & Local Government Offices & Public Schools