[Appraisals of iron and copper mines], 1910-1972.

ArchivalResource

Michigan. Geological Survey. [Appraisals of iron and copper mines], 1910-1972.

[Appraisals of iron and copper mines], 1910-1972.

http://www.worldcat.org/oclc/49880116

Series 1 and 2 of record group RG 81-14 consist of records relating to the appraisal of Michigan copper and iron mines. The first set of records are appraisals of iron and copper mines (1910-70). Under Act 114 of 1911, Act 341 of 1913, and Act 285 of 1949 (Section 24), the State Tax Commission, with the assistance of the Geological Survey, was to "examine into, inventory, and appraise all mining properties in the state of Michigan." To obtain the necessary data, inspecting geologists determined the amount of ore mined, shipped, in stock, and in reserve; the chemical character of the ore; and the kinds of improvements made to the property. Each operation is then evaluated in the annual reports, with the above information being supplemented by a legal description of the property, a review of the past year's activities, and brief attention to prospects. The other set of records are the iron and copper mine summary appraisals (1914-72). These reports offer an overview of the iron and copper mining industries during past years, plus graphs, charts, and statistics concerning costs, production, shipments, market conditions, and suggested valuations by mineral range, county and mine.

13.5 cu. ft.

State Archive of Michigan