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.
Unknown Virginia Electric Power Company (Ground) (Found around Arlington, VA) Indiana-Michigan Electric Company Union Pacific RR
Utah Power and Light Utah Power and Light Pennsylvania Railroad Taylor-Colquitt Co. (found with RR 28 Nail)
Union Telephone (Smackover, Ark.) Union Pacific RR
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