State Of Illinois--conservation Dept Of, Rangers Office Delabar State Park Oquawka, IL 61469 Phone : (309) 867-3671 Business Category Government Offices-State Land Mineral Wildlife & Forest Conservation Government Offices State & Local Government Offices & Public Schools Illinois State Of--conservation Dept Of, Delabar State Park, Rangers Office Oquawka, IL 61469 Phone : (309) 867-3671 Business Category Government Offices-State Government Offices State & Local Government Offices & Public Schools