2010-12-16_PERMIT FILE - C1982056

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Twentymile Coal Company 18 LT Utility Borehole — Drilling October 27, 2010 OVERVIEW Twentymile Coal Company (TCC) will be installing a utility borehole at its 18 Left (18LT) shaft site. The utility borehole shall include a 60' long, grouted, 16" diameter conductor casing. The utility borehole shall be drilled to a nominal 14 -3/4" inch diameter to a depth of approximately 1390 feet below the surface. Two steel pipes are to be placed inside the nominal 14 -3/4" drilled hole from the surface to the mine opening. One pipe will be a schedule 80, welded joint, 8 -5/8" diameter pipe. The other pipe will be a schedule 80, welded joint, 4 -1/2" diameter pipe. TCC shall provide the welded joint pipes. Bidders are requested to prepare a proposal for the 18 LT Utility Borehole — Drilling. The proposal is to include: • A detailed description of all work the Contractor is intending to perform, • A schedule detailing Contractor's plan to complete the project within TCC's project timing, and • An itemized bid including all major categories of the proposal. LOCATION The TCC mine site is located approximately 9 miles north of Oak Creek, Colorado, on Routt County Road #27. The access road to the f 8 LT shaft site is located off Routt County Road #27, approximately 5.5 miles northwest of the intersection of Routt County Road #27 and #33. From this point, a short dirt road will lead to the shaft site. Refer to the attached Exhibit A Location Map for shaft site location. PROJECT TIMING he projected dates and timing for the project follow: 1. Submit Responsibilities, Specifications and Scope of Work to Contractors 2. Bids Due at TCC 3. Award contract , pending MPA & Contract process 4. Commence Mobilization, pending permit approvals 5. Commence Rig Setup and Drilling 6. Complete Drilling COMPLETION SCHEDULE 10/27/2010 11/04/2010 Week of 11/08/10 ASAP, 11/15/10 ASAP, — 11/15/10 ASAP, 12/03/10 TCC reserves the right for inspection of all work according to the following specifications and scope of work provided herein this document. All scope of work questions shall be directed to Michael Berdine at TCC at (970)- 870 -2782. A schedule shall be submitted with the Contractor's proposal that accurately defines the Contractors required timing to secure materials and complete the project. The Contractor shall identify any potential problems that may interfere with the Contractor's ability to mobilize immediately after receiving the purchase order from TCC to proceed. • 18 Left Utility BH Sscope of Work 102710.doc 10/27/2010 Page 1