Back in 78 & 79 I worked at a company that built foundation drilling equipment. That rig on the crane looks a lot like the Watson 5000 unit.
We built a special unit for the Stan Anderson drilling company of California that could bore a 12 ft diameter hole 150 feet in the ground then bell the hole at the bottom ot 3x the diameter
Looking at it again I can see several times when a loader clears them away and the video had run from the beginning to make several up sizing's of the bore
Last edited by Frank S; Apr 27, 2018 at 02:27 AM.
There are currently 1 users browsing this thread. (0 members and 1 guests)