[Alta, UT]: [Columbus Consolidated Mining Company], October, 1911. Plate 3. Hand-colored blue line map [82.5 cm x 1086 cm] / [32 1/2" x 42 1/2"] on two sheets. Gentle wear to extremities with upper left corner chipped with a few small losses. About very good. Item #6566
Large mine tunnel map for the Columbus Consolidated Mine that was located in the infamous mining town of Alta, Utah.
"The Columbus Consolidated Mining company own and operate one of the best producing mines in this district. It is located at Alta, in the Little Cottonwood Mining district and is recognized as being one of the best paying properties in that district. the company was incorporated about five years ago and employ about 125 men in their mine, shipping about 2,000 tones of ore a month" - Truth[!] (05/26/1906).
Presumed unique. Rare.