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Clf3O 007 <br />MR-3&7 <br />Date: 18 August 2010 <br />To: Tom Kaldenbach, Lead Specialist <br />From: Marcia L. Talvitie, P.E. <br />Subject: West Elk Mine - Permit No. C-1980-007 <br />MR-367 - As-builts for CPP Pilings <br />Adequacy Review - Engineering <br />In accordance with your 17-Aug-2010 request via Email, I have reviewed the as-built drawing <br />provided by Mountain Coal Company for the steel piles installed beneath the Coal Preparation <br />Plant (CPP). <br />Construction of the CPP atop the previously constructed Lower Refuse Pile (LRP) was approved <br />by the Division with TR-118. Prior to actual construction of the CPP, the contractor determined <br />that installing an array of steel piles beneath the approved mat foundation would improve the <br />overall stability of the CPP. <br />The Division approved the use of the steel pilings with MR-363 and the attached Stipulation No. <br />80. With MR-367, MCC has submitted as-built drawings of the steel H-beam layout. This plan <br />sheet adequately satisfies the requirements of the Stipulation. <br />Please do not hesitate to contact me if you require additional information regarding my review. <br />cc: Sandy Brown, DRMS