Shot Hole in the Wall of Hebden Horse Level
This photograph taken in 2006 by Peter Hodge, shows the remains of a shot hole in the wall of the adit. The diameter is 1¼", and the length 15". These shot holes were made with compressed air drills powered by the waterwheel. Dynamite was placed in the hole followed by a percussion cap with about 18 inches of fuse. The rest of the hole was then filled up with earth and the fuse lit. It burnt for about 5 minutes, giving the miner time to get clear, before igniting the percussion cap which in turn detonated the dynamite. Click the photograph for a larger image.