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Dawson (1978), Colorado coal directory and source book: CCS Resousce Series No. 3. <br />George (1937), Analyses of Colorado coal-s: U.S. Bureau of Mines ?ech.'Paper 574. <br />~• Goolsby (1979), Evaluation of coking coals in Colorado: CCS Reaource.Series 7. <br />~ Hills (1893), Co:1 fields of Colorado: U.S. Geol. Survey Min. Res. 1892. <br />Holmes (1877), Geology of San Juan Division: Annual Report Hayden Survey. <br />Hornbaker {1976), Coal resources of Colorado: CGS Sp. Pub. No. 9. <br />Jones (1976), Coal mines of Colorado; CGS Info. Ser. 2. <br />Jones (1977), Licensed_eoal mines in)Colorado: CCS Map Ser. No. 8. <br />Jones (1978), Coal resource and development map of Colorado; CCS Iiap Ser. No. 9.. <br />Lakes (1889), Coal fields of Colorado: Hines and Minerals, v. 19. <br />Laadis_(1959), Coal resources of Colorado: U.S. Geol. Survey Bull. 1072-C. <br />National King Coal Inc. (1979),. Colorado mined land reclamation board permit <br />application coal lease PU-058300. <br />Reynolds (1946), Carbonizing properties of western coals: U.S. Bureau of <br />Mines Tech. Paper 692. <br />Schrader (1906), The Durango-Gallup coal field: U.S. Geol. Survey Bull. 285F. <br />• Stealer (1907), Western part of the Durango coal field: U.S. Geol. Survey <br />Bull. 316. <br />Taff (1907), The Durango coal district:- U.S. Geol. Survey Bvll. 316. <br />U.S. Bureau Mines (1952-1972), Analyses of tipple and delivered samples of <br />coal: U.S. Bureau of Mines Reports of Inv. <br />U.S. Bureau of Mines, Adm. Reports re: Coal in T. 35 N. R..11 W. <br />in U.S. Geol. Survey, Conserve[ion Division, CR2~L~ Township files?lPH. <br />U.S. Geological Survey and U.S. Bureau Hines (1976), Coal resource classification <br />system: U.S. Geol. Survey Bull. 1450-B. <br />Lapp (1949), Geology and coal resources of the Durango area: U.S.'Ceol. Survey <br />OM Map 109. <br />David L. Caskill <br />Attachments <br />Chart 1 Coal reserve calculations for lease application area <br />.` Chart 2 Coal reserve calculations by 40-acre tracts for lease application <br />area <br />Figure 1 ,Map shoving location of lease application area C-29125 and <br />reference points used to calculate coal resources <br />Figure 2 ~Ceologic and structure contour map of Lease application area <br />' shoving coal beds, mines, and prospects <br />Figure 3 Columnar sections shoving the stratigraphic position of coal <br />beds in the Hay Gulch area <br />~~• S <br />November 1993 <br />