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E Seam Drill Hole for Concrete I2elivery Project Plan <br />Minor Revision 333 <br />Page 6 of 9 <br />18 to 24, Class III Cultural Resource Inventory, Gunnison County, Colorado". No <br />cultural resources were identified in these investigations. <br />PROPOSED ACCESS ROUTES <br />The access route for this drill hole wiill be via fire existing Sylvester Gulch Road that <br />leads to Shaft No. 3 and the Metahne Drainage Building. <br />PRE-DRILLING ACTIVITIES <br />Construction and drilling activities will be supervised by a project representative of <br />lvlountain Coal Company, L.L.C. Any significant proposed changes in the project after <br />permit approval would be reviewed with the appropriate regulatory agencies before <br />changes take effect_ <br />Staging areas to be used by the drilling contractor will be used in a manner to minimi~P <br />damage to the vegetation Any surface disturbance to these sites will be re-graded and <br />seeded to promote rehabilitation <br />Access mutes are maintained to accommodate full sized 4X4 pickup trucks, ATVs, and <br />required drilling equipment, including but not limited to the following: truck mounted or <br />skid mounted drill rig, air compressors andbr booster, rig-up truck, portable water tanks, <br />boom truck, utility trailer, drill pipe lay~lown rack, and crew trucks. <br />Topsoil has been stripped, stockpiled, and identified with a sign as part of the Sylvester <br />Gulch Construction AclivitiP.S in 1997. <br />No mudpit to accommodate drill cuttings will need to be constructed. <br />DRILLING ACTIVITIES <br />Drilling activities for the proposed concrete delivery drill hole will include mobilizing <br />drill equipment to the site and drilling and setting approximately 40 feet of 12-inch <br />surface casing into bedrock. The hole will be rotary air drilled to a depth of <br />approximately 430 feet where the hole will intercept the E Seam. The hole will be drilled <br />with a 9-inch diameter hole to the E-Seam, then cased with 7 ID steel casing and grouted. <br />A depiction of a typical completed well will be forwarded to the CDIv1G along with the <br />typical plug and abandonment diagram. <br />Initially, MSI-IA may require monitoring and inspection of the wells twice daily after <br />installation It is anticipated the frequency of monitoring would decrease to a weekly <br />monitoring and inspection of the installation Routine maintenance will occur to the <br />extent necessary, simultaneous with the weekly monitoring. <br />