96 CLASSIFICATION OF THE PUBLIC LANDS. 



BBGULATIONS FOR THE CLASSIFICATION AND VALUATION OF PUBLIC COAL 



LANDS. 



The following regulations were approved February 20, 1913, by 

 Secretary of the Interior" Fisher: 



H. OI.ASSIFIOATION'. 



1. Land shall be classified as coal land if it contains coal having — 



(a) A heat value of not less than 8,000 B. t. u. on an air-dried, 

 unwashed or washed, unweathered mine sample. 



(6) A thickness of or equivalent to 14 Inches for coals having a 

 heat value of 12,000 B. t u. or more. Increasing 1 inch for a de- 

 crease from 12,000 to 11,000 B. t u., 1 Inch for a decrease from 

 11,000 to 10,500 B. t. u., 1 inch for each decrease of 250 B. t. u. 

 from 10,500 to 10,000, and 1 Inch for each decrease of 100 B. t u. 

 below 10,000. 



(c) A depth below the surface for a bed of coal 6 feet or more 

 thick of not more than 100 feet for each 300 B. t. u. or major 

 fraction thereof, and for a bed of minimum thickness for that 

 coal a depth of not more than 500 feet, and for beds of any thick- 

 ness between the minimum and 6 feet a depth directly propor- 

 tional to that thickness within these limits, provided that, if the 

 coal lies below the depth limit but witiUn a horizontal distance 

 from the surface not exceeding 10 times the depth limit, or if its 

 horizontal distance from the foot of a possible shaft (not deeper 

 than the depth limit) plus 7.5 times the depth of such shaft does 

 not exceed 10 times the depth limit, the land phall be classified as 

 coal land; provided, further, that the depth limit shall be com- 

 puted for each individual bed, except that where two or more beds 

 occur in such relations that they may be mined from the same 

 opening the depth limit may be determined on the group as a 

 unit, being fixed at the center of weight of the group, no coal 

 that Is below the depth limit thus determined to be considered. 



2. Classification shall be made by quarter-quarter sections or surveyed lots, 

 except that for good reason classification may be made by 2J-acre tracts or 

 multiples thereof described as minor subdivisions of quarter-quarter sections or 

 rectangular lotted tracts. 



n. VALTTATIOir. 



3. For purposes of valuation the price per ton for a noucoklng, nonanthraclte 

 coal 6 to 10 feet thick shall be one-tenth of a cent for each 1,250 B. t. u. : 



(a) Provided that the price per ton may be Increased by not more 

 than 100 per cent if the coal is coking, smokeless, or anthracitlc 

 or has other enhancing qualities ; or it may be decreased for high 

 sulphur or ash, friability, or nonstockmg or other qualities that 

 reduce the value ; and 



(6) Provided, further, that if the coal In one bed is over 10 feet 

 thick the price on each foot above 10 feet shall be reduced 1 per 

 cent for each such foot (thus the reduction will be 1 per cent on 

 the eleventh foot, 2 per cent on the twelfth foot, and so on) ; or 

 if the coal Is less than 6 feet thick the price shall be reduced by 



