Show Kenne Kenn ecoff cuts drilling costs uses mobile rigs SALT LAKE CITY development and use 0 of a special mobile mine drill has been responsible for revolutionary changes at the utah copper operations of the copper corp says L E enow snow general foreman of drilling and blasting for the first mobile drill was developed tested and placed into operation in the utah copper pit in 1951 snow said since then additional drills have been put service and the conversion to all mobile drilling wag was completed in november 1953 |