Salt Lake Tribune | 1919-10-30 | Page 14 | Mine Unwatered by Suction Method

MINE UN WATERED BY SUCTION METHOD Unwatennj of the Idaho-Maryland vertical ver-tical shaft to a depth of 420 feet has been accomplished by compressed air suction, sava the San Francisco Chronicle. It is stated by local engineers that this marks the first larc-scale unwateringr of any California mine by the compressed air method, which totally eliminates the use of pumps and is far more economical than the old practice. Suction is supplied hy powerful compressors, com-pressors, and so satisfactory have results been that the. management expects to clear the 1000-foot shaft without resorting to ptimp.H. A temporary hoist has been erected over one of the shaft compartments compart-ments and repairs to the .shaft are proceeding pro-ceeding as rapidly as tiie water is lowered. A powerful hois tins' plant is bein ns-semtaled ns-semtaled and a largo electrical station built and equipped.