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Taaeesa Miroiroa iaC. <br />August 21, 2017 <br />Jason Musick <br />Division of Reclamation, Mining, and Safety <br />1313 Sherman St. Room 215 <br />Denver CO. 80203 <br />RE: Williams Fork Land Company <br />Notice of Intent No. X-2017-234-02 <br />Coal Exploration Drill Hole Abandonment Report <br />Dear Mr. Musick, <br />RECEIVED <br />AUG 2 8 2011 <br />DIVISION OF MINING AND SAFETY <br />ON <br />In accordance with Rule 4.07.3(3) of the Regulations of the Colorado Mined Land Reclamation Board for <br />Coal Mining, adopted in accordance with the Colorado Surface Mining Act, C. R. S. 34-33-101 et. seq. a <br />Coal Exploration Drill Hole Abandonment Report is being submitted for 4 drill holes (refer to attachment). <br />One drill hole was drilled at each site. A larger bit size was used to set surface casing if needed. Due to <br />unconsolidated sands and gravel, hollow -stem auger drilling was used for drilling and casing the holes <br />simultaneously. A smaller bit was used to rotary down to the core depth, if needed, and an even smaller <br />bit size was used to core continuously to the final depth of the drill hole. Water levels for each hole were <br />taken prior to abandonment. Each hole was immediately abandoned upon its completion. <br />Portland Type II cement, bentonite gel and water was used for grouting each hole. The grout ratio was: <br />for every 94 Ib. bag of Portland Type II cement there was 6 gallons of water and 5 lbs. of bentonite gel. <br />The densities for the grout material were 94 pounds per cubic foot for the Portland Type II cement, 62.4 <br />pounds per cubic foot for water and 70 pounds per cubic foot of bentonite gel. The driller recorded the <br />amount of sealant that was pumped into each hole. <br />Please contact me if you have any questions. <br />Sincerely, <br />Tonia Marie Perkins <br />Senior Mining Engineer <br />P.O. Box 187 Craig, Colorado 81626 (970) 824-4401 <br />