Past and future coal production in the United States: M:ines and Minerals, 1908, pp. 462-465. 2 Tho production for the decade ending in 1915 was 4;918,717,283 tons. perhaps within 50 years, much of the high-rank coal will be exhausted. According to the latest estimates 3 the_ coal reserves of the world, by continents, are as follows: Short tons.
The Lost Creek coal field lies in Morgan County, Utah, about 10 or 12 miles northeast of Devils Slide station, on the main line of the Union Pacific Eailroad. (See fig. 44.) The field takes its name from Lost Creek, a tributary of Weber Eiver, and comprises about 8 or 10 square miles in T. 5 N., E. 5 E., Salt.Lake base and meridian. It lies between the Echo Canyon drainage basin on the east and the Ogden Canyon drainage basin on the west. The area examined includes parts of Tps. 4, 5, and 6 N., Es. 4 and 5 E., but no coal of economic importance was found outside T. 5 N., E. 5 E., where it has been mined in a small way at several places to supply demands of ranchers. A considerable portion of the coal mined was hauled by team to the town of Croydon, 8 or 9 miles from the mines. The wagon road from the railroad to the mines is good for most of the distance except during the winter. The average grade of the road up Lost Creek is about 50 feet to the mile, but the grades of branch roads up the side canyons to the mines are from 200 to 300 feet to the mile.-The coal bed, which is lenticular and varies greatly in thickness even in small areas, is confined to one coal-bearing zone. It is subbituminous and contains much moisture ,and many impurities in the form of small lenses or partings of bone and shale. The field was examined in 1914 for the purpose of verifying or disproving the many reports regarding the possibility of a commercial field in this area and to obtain data from which a proper classification and valuation of the land might be made. The mapping was done with the Gale telescopic alidade and plane table. Locations were made by the three-point intersection method from a system of triangulation expanded from a carefully measured base line. Secondary locations were made1 by stadia readings or short stadia traverses in .deep canyons where, points of the primary triangulation were invisible. These traverses were tied to Government land corners and to the primary system of triangulation.
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