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March 26, 2004 <br />5. Submit any documentation available demonstrating the work completed inside the Research <br />Mine Portal prior to sealing. W WL constructed the concrete sack dam and awarded a <br />subcontract to Canberca Concrete Pumping of Glenwood Springs, Colorado to install the <br />shotcrete application. Attachment A presents photographs of the concrete sack dam after the <br />shotcrete application. The photographs also show the shotcrete application around the <br />discharge pipe. The earth plug was first constructed by backfilling with a skid loader inside <br />the portal to mitigate voids and attain better compaction of the material (no photographs aze <br />available of this work). <br />W WL understands that the DMG is in the process of further evaluating the portal closures as presented <br />in TR No. 4. An accompanying letter addresses an extension request for review of TR No. 4 by DMG. <br />If you have any questions or comments, please contact me at 970-242-0170. <br />Sincerely, <br />~~ ~ ~~ <br />Bruce D. Smith <br />Principal Hydrogeologist <br />cc: Franklin Miller, Glenn Springs Holdings, Inc. <br />Project File <br />Enclosures <br />