I have a situation I have never run across before. My customer just built a boat house / bath house / boat lift / outdoor living room / beach on his private ski lake. It is obviously constructed abutting the water. The construction is concrete including two concrete slips with lifts for his boats. My queston is - there is a metal railing running next to the waters edge, and surrounding the boat slips as well as metal stairs leading to another dock. None of the metal enters the water, but it could be touched from in the water, or in a boat. Does this need to be connected to an equipotential bonding grid to eliminate voltage gradients? I am having trouble classifying the location. It's not a swimming pool, although he did put in a beach, so there will be swimming. It's not a marina / boatyard as I picture them. 210.8 is only referencing the branch circuits. There is no shore power running to the boats. Hopefully someone who lives closer to the water then I do has run into this before.