Thanks for all the suggestions! The stump rot granules sound like the way to go. I have a long drill bit I can use (3'). I'm not a chemist; but just curious how caustic (if that is the right word) that stuff is to use around that cable? Saw on TV where gasoline was used; it melted the insulation on the cable. Also the time issue is not a problem; would just like to get rid of it. Would love to go fishing; but the boat is not ready; and with SE winds 10-15 knots; it tears up bay fishing.
Will call the phone company; will see what they say.
Posted this on another Forum (LM). One said to use epsom salt and vinegar. I use that for weed killer. Again; thanks for the suggestions.
Potassium Nitrate (Stump Rot) is not a corrosive per say like an acid, but actually an oxidizer. In other words it breaks down the wood through an increased oxidation method and not like an acid.
And instead of buying the typical product called Stump Rot in the little containers, just go to your local gardening center and ask for potassium nitrate and buy it by the pound. A heck of a lot cheaper and the exact same product.
Then just drill some holes, however many you like, and pour in the potassium nitrate followed by water and let it do the work. Yes it will take a long time, but you will not have to worry about the cable or any hard manual labor. BTDT!