Removing Submerged Navigation Hazards

T.H.E. Binz · 07-19-2006, 12:03 PM

I've got two large rocks about 30' off the end of my dock that have a history of collisions with boat propellers. The size of the rocks (at least what is above the lake bottom) is about 4' x 4' x4'. At full lake elevation, they are about 24" below the surface. One of the largest barge-mounted excavators operating on the lake was unable to move these rocks. I am told that one cannot get a permit from the NHDES to dynamite the rocks.

Does anyone know of a marine contractor, or a drilling and blasting outfit, that could drill holes in these rocks and split them up using expansion agents, rock-splitters, etc.?

I was going to try to expose the rocks during the winter and drill holes for an expansion agent, but the lake was too high and the ice too thin this year!

07-19-2006, 12:03 PM	#1
T.H.E. Binz Senior Member Join Date: Apr 2004 Location: Meredith & Chadds Ford, PA Posts: 112 Thanks: 0 Thanked 11 Times in 8 Posts	Removing Submerged Navigation Hazards I've got two large rocks about 30' off the end of my dock that have a history of collisions with boat propellers. The size of the rocks (at least what is above the lake bottom) is about 4' x 4' x4'. At full lake elevation, they are about 24" below the surface. One of the largest barge-mounted excavators operating on the lake was unable to move these rocks. I am told that one cannot get a permit from the NHDES to dynamite the rocks. Does anyone know of a marine contractor, or a drilling and blasting outfit, that could drill holes in these rocks and split them up using expansion agents, rock-splitters, etc.? I was going to try to expose the rocks during the winter and drill holes for an expansion agent, but the lake was too high and the ice too thin this year!