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i `~ • III IIIIIIIIIIIII III <br />• ~ Colorado Yampa Coal Company I 29588 Routt Coun[y Road #27, Oak Creek, CO 0467 • (~ ) 879-3800 <br />February 17, 1987 <br />~~, "YE' ...e <br />Catherine Begej ~''~~`~ <br />Reclamation Specialist F~~ ;;Q 1987 <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street, Room 423 ~pNEO ~pND <br />Denver, CO 80203-2273 RECLAMATION DIVISION <br />Dear Ms. Begej: <br />Re: Minor Revision 87-11; Supplemental Geochemical Overburden <br />Analysis: Little Middle Creek Tract (Permit Revision Aoolication to <br />C-81_071) <br />Colorado Yampa Coal Company is requesting a minor revision to drill two <br />(2) additional overburden samples within the proposed Little Middle Creek <br />Tract. As discussed, the holes will be placed in the east and west portions <br />of the proposed Wolf Creek Seam mining area. The proposed hole locations are <br />depicted on Map 7B, Geology. The coordinates of holes 026-87-1 and 026-87-2 <br />are 16,100 N: 8,600 E and 13,700N: 4,700 E, respectively. Overburden depth <br />.: is approximately 155 feet at 026-87-1 and 120 feet at 026-87-2. Colorado <br />Yampa Coal Company will analyze 15 feet of the roof, interburden (if <br />present), 10 feet of floor material and the coal seams. Within the roof, <br />interburden (if present), and floor material, five (5) foot interval core <br />samples will be analyzed for the following parameters: pH, electrical <br />conductivity, calcium, magnesium, sodium, sodium adsorption ratio, lead, <br />nickel, cadmium, organic sulfur, pyritic sulfur, sulfate sulfur, marcasitic <br />sulfur, total sulfur, ammonium nitrogen, nitrate nitrogen, acid base <br />potential, and neutralization potential. The coal samples will be analyzed <br />for the sulfur forms only. <br />Once Colorado Yampa Coal Company receives the laboratory analyses, the <br />applicable portions of Rule 2.04.6 will be revised to reflect a discussion of <br />the results. The final locations will be delineated on Maps 7A and 76, <br />Geology, Map 8A, Wadge Seam Coal Isopach, and Map 8B, Wolf Creek Seam Coal <br />Isopach. A revised Table of Contents will also be submitted. <br />Please call if you have any questions or require additional information. <br />Sincerely, ~~C,~l/I/l'PS = n~~~~lPn~~~r ~ryl <br />Clai emmer ~~~~~ <br />Environmental Specialist <br />~~' CES/de r ttI-I 2 G ~l~ ~~~ \ ~~ e~ <br />Enclosures <br />G eo~a5 I <br />