Summary of reserve tonnages, and calculated life based on 1942 shipments, otal Minnesota
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1 Reserve tonnage are allocated to the various companies in accordance with the owner-
ship or the controlling leasehold or fee interest as of May 1, 1943, as shown in the 1943
Mining Directory of Minnesota, Miscellaneous operating companies include Argonne
Ore Co., F. Christofferson, Coates & Tweed, E. W. Coons & Co., Carl Hedman & Co.,
Moore & Crago, C. W. Moore Mining Co., Remington-Carwin Co., and Rockwell &
Strand. The tonnages shown under fee and leasehold interests consist of the tonnages of
reserve ore on properties that were not under lease on May 1, 1943.
Reserve tonnages are calculated from the tonnages shown by the department of taxa-
tion for May 1, 1942, adjusted for the amount of ore shipped from May i to Dec. 31, 1942;
figures include ore in ground and in stockpile. These tonnages constitute proved ore
only, and do not include the tonnages of concentrates that may be produced from the
taconite or other low-grade nate ial not carried on the tax records at the present time.
The classification of tonnag ss taken from the records of the department of taxation, as of
May 1, 1942. The tonnage figures shown for concentrates refer not to the tonnages of the
crude ore, but to the estimated onnage of concentrates to be produced from the crude ore.
3 Ore mined by milling is included in open pit direct ore. Ore that has been merely
crushed and screened is included in the direct shipping ore.
No calculated life is shown where the shi ment is either negligible or none.
NOTE.-Estimated life based on annual hipments of 60,000,000 tons and omitting Oliver
reserves approximately 5.82 years.
Minnesota iron ore statistics—tons mined, transportation charges, Lake Erie base price, value at mines, Cuyuna, Mesabi, and Vermilion Range
Prior to 1938 information taken from Lake Superior Iron Ore publication of 1938. 1. Yearly ore shipments, p. 309; 2. Base price of ore at lower lakes, p. 322; 3. Railroad rates, p. 323; 4. Lake rates, p. 324. Subsequent to 1938, shipments, transportation costs, Lake Erie base prices, taken from Mining Directory of Minnesota. 1944, Great Northern Tariff, 259-q. ICO A-8121.
Total Minnesota iron ore shipments, by ranges and railroads, years 1939 to
NOTE.-Summary of shipments to docks and all rail shipments taken from Lake Superior Iron Ore Association records. Record of direct and beneficiated ore shipments taken from records of the Mines Experimental Station, Minnesota.
Minnesola fron are shipments by compuntra, wear (244
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