Here's more information on the cable. The concrete protection is only used at the shoreline where ice could damage the cable. The cables are wrapped with steel armor and then some kind of a plastic jacket (PVC) is applied over that, so your anchor has no chance of being electrified and lighting you up! Cable is pretty heavy and it would be difficult to pull much of it off the bottom if you hooked it. The older cables had a wrapped steel armor with an impregnated cloth-like covering that deterioted with age and the steel eventually rusted away. Most of the cables have been on the bottom a good number of years and are mostly covered by silt.
Some cables had a lead sheath for protection, common with telephone cables years back.
There are many islands that don't have power; these come to mind in my area:
Timber, Round, Camp, Little Camp, Breezy, Kinneho, Crescent, and Fish.
There's a project for someone with time on their hands: complete the list.
