Keywords: Ottawa County 66.svg Ottawa County Ohio as seen at http //www state-ends com/ohio/oh795/ Based on US DOT FHWA MUTCD SHS 2004 3-7 M1-6 450x450mm 000 svg 2013-07-11 01 10 56 own Minh Nguyen cc-zero Uploaded with UploadWizard Diagrams of county route markers with county name 0066 66 number Diagrams of route markers of Ottawa County Ohio |