Railroad groundwire connection?

Question

Anybody know the best way to connect a railroad rail to a groundwire? This is for a rail extension to a coal burning power plant with coal delivered by rail.

Answer 1

Redundant ground rods.

Answer 2

this is not a groundwire but a signal wire to tell the exact location of all rail traffic to raise & lower crossing gates. It is connected to the rail with a small charge of thermit. the same material used to weld rail into ribbon rail