Beautifully engraved certificate from the Carp Lake Mining Company
issued in 1863. This historic document was printed by Sanford & Hayward and has an ornate border around it with a vignette of two men overlooking a lake. This item has the hand signed signatures of the Company’s President, A.S. Sanford and is over 153 years old.
THE MINING MAGAZINE AND JOURNAL OF GEOLOGY - 1860
The Carp Lake Mining Company is organized under the General Mining Law of the State of Michigan, and has its Office at Cleveland, Ohio. The property is in the County of Ontonagon, Township 51 N., R. 43 W., and includes over 900 acres of land, most of which is well-timbered, and of the best quality for agriculture. It is upon the celebrated Porcupine Ridge of trap-rock, which, at the mine, is nearly 1,000 feet high, and extends parallel with the shore of Lake Superior. The northern slope is gradual, but to the south it descends precipitously to Carp Lake.
Five or six veins have been traced running parallel, and dipping with the rocks. The Company is now sinking two shafts near the eastern end of the property. These follow the dip of the vein, as they should at this inclination (only 30*), and the ore is raised in tram-wagons. Shaft No. 2 is now down 75 feet from the surface, and No. 3, 50 feet. The vein is said to vary from two to four, and six feet in width, and to bear numerous masses and sheets of native copper, and considerable quantities of rich stamp work. The copper is chiefly found in one foot of the lower part of the vein, which is so soft as to be very easily and cheaply worked. The hanging wall is a dark gray trap, like that of the Minnesota mine. The average of the ore is said to yield 10 per cent, of ingot copper. Native silver, in minute particles, has recently been reported.