This was a special project for the Crazy Horse Monument to build a Pointing machine to measure the progress in carving and rock removal at the sculpture of Crazy Horse.
The machine is to be mounted on the hand to document the work being done there then have the ability to be moved anywhere on the mountain to record the work being performed.
The machine was delivered on Friday the 18th with everyone very optimistic about the arrival. We had some paint damage from the trip, a bit more than we would like for a project like this but we can fix that. Monique (mountain sculpture and manager) was very happy with the look and operation of the machine.
Our first project was to set the bottom rail that the machine would be riding on. This required finding rock anchors and leveling bolts. We found both mechanical bolts and some threaded bar we could set with epoxy to use, both pieces had the same thread which worked out very nice. After surveying in the rail and laying out the holes we drilled for the different kind of bolts and set the bolts. This took all of our first day there but we had everything set and the rail mounted and leveled.
Above is a view of where the pointing machine will set for measuring the hand of Crazy horse. That’s a nice 365’ drop from each side out on the hand.
Day #2; this morning was spent checking the level and security of the rail system. We did not want and mishaps with handling the pointing machine at the end of the hand. We also had some very nice 50 mph winds this day but we decided this would be a very good challenge since the weather is never very calm at this point of the mountain.
After double checking our level and torquing the bolts we were ready to move the pointing machine. We did some calculations to get our center of gravity over the rail and moved the machine to the top of the arm.
This picture shows how the machine will measure the side of the arm reaching 27’ off of the “X” axis with the plumb bob.
We used the survey prism to check the measurements of the machine with known points on the mountain. This was mostly done on our third day because of the intense wind we had setting the machine. After using the pulleys and testing the cables with all the tooling in place we were happy that all worked well. This being a special project and the only thing like this in the world makes all the processes very unique.
The third day we tested all the movements using the full length of the rail and moving the prism on the “Z” axis (UP/DOWN) taking measurements at different locations and known points on the mountain. After taking all our measurements into the office for comparison we were happy to find the pointing machine working as expected.
This was a great trip and this machine will set on the Crazy Horse monument for many, many years.
This report was submitted by Glenn Patterson VP Engineering after his latest trip to the mountain.