By passing the cursor over each nail, you can see information about that nail. Some of them are marked "Unknown". If you have any information on those nails, or find a discrepancy, please e-mail me.
Montana Power Company Lousiville & Nashville RR Lousiville & Nashville RR Lousiville & Nashville RR Mexican SOO Line
Lousiville & Nashville RR Unknown Pole Nail Mexican Lousiville & Nashville RR Type(19) Lousiville & Nashville RR Lousiville & Nashville RR
Moshassuck Valley RR; Misc. Public Service Mexican Louisville & Nashville RR  (Clearance at Switch) Type (05) Unknown Unknown Baltimore & Ohio test section in Boyds, MD.
Wisconsin Public Service Mexican Louisville & Nashville RR Dakota Power, Rapid City South Dakota Unknown (screw type shank) Detroit Edison
Mexican Lousiville & Nashville RR Detroit Edison Mexican Unknown Chicago & Northwestern RR
Detroit Edison Detroit Edison Mexican Mexican Detroit Edison Mexican
Iowa Public Service Interstate Power Company(Minn, Iowa & Ill) Mexican PG&E (Joint Guy, Used to indicate multiple Utilities on same anchor) Detroit Edison Unknown
Mexican Municipal Light, Lincoln Nebraska Minnesota Power and Light Minnesota Power and Light Mexican Mexican
Chesapeake & Ohio RR Illinois Central RR Duluth, Missabe & Iron Range RR Reclaimed pole in Calif and Arizona Unknown Type (18c) Soo Line Type (07)
Mexican Unknown Baltimore & Ohio RR (test section in Boyds, MD) Sidney Municipal Service (Neb) Santa Fe (Steam Treated) Baltimore & Ohio RR (test section in Boyds, MD)
Southwest Creosoting Co. (found with 2in. 39 nail) Southwest Light and Power Company Southwest Light and Power Company Southwest Light and Power Company Southern Wood Preserving? Unknown
Mexican Taylor Colquitt Co.(Used with 28 or 29 Date Nail) Baltimore & Ohio RR (Test Section in Boyds, MD) Tri-States Telephone & Telegraph Company Tri-States Tel. & Tel Company Utah Power & Light
Utah Power & Light Unknown (2 1/2 X 3/16) Type(07) Tri-States Tel. & Tel Company (West) unknown Santa Fe (used to indicate substandard or inferior tie) Santa Fe (used to indicate substandard or inferior tie)
Santa Fe (used to indicate substandard or inferior tie) Santa Fe (used to indicate substandard or inferior tie) Santa Fe (used to indicate substandard or inferior tie) Santa Fe (used to indicate substandard or inferior tie) Santa Fe Municipal Water Light & Power Nebraska
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