While mounting a ladder onto my deck, I mistakenly drilled holes all the way through the top of my U-shaped pontoons. I can't get to the holes without removing my deck. The top of the pontoons are about 1 1/2" below the bottom of the deck.. The holes in the pontoon are about a foot from the edge of the deck and about 8 inches from the edge of the pontoon. Any advice as what to do? This was the last step of a total rebuild and I mistakenly used the same drill bit I was using to drill through my 1 1/2 fencing + 3/8 spacers. I'm hoping I can ignore the problem and just drain the pontoons each fall as I have drain plugs in the pontoons.