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Narding Lawson Associates <br />• <br />May I5, 1996 <br />Ms. Christine Johnston <br />Mountain Coal Company <br />West Elk Mine <br />Somerset, Colorado 81434 <br />RE: Silo Haull Access Road Certification <br />Dear Christine: <br />Harding Lawson Associates has reviewed the Silo HauUAccess Road for its certification as a haul <br />/access road according to CDMG criteria. The criteria for haul access roads aze stated in Section <br />4.03 of the Regulations of the Colorado Mined Land Reclamation Board for Coal Mining. All <br />required criteria were met for this road. This road was constructed in 1995. There are no side <br />slopes steeper than 1.5H:1 V. The road does not have an overall grade steeper than 10 percent and <br />does not have a pitch grade steeper than 15 percent. The water wntrol system was designed to <br />safely pass the peak runoff from a 10 year 24 hour precipitation event. <br />If }•ou have any questions, please give me a call. <br />• C/~~il~ese¢~ yours <br />Charles C. Rehn, P.E. <br />Salt Lake City Principal Engineer <br />~Q~ffO <br />O~ ~~... <br />4 _.. u <br />N • ~ <br />., <br />•i.~~ (~ <br />,• y <br />`~ ~_ - ~~ <br />• <br />Engineering ane 155 South 700 West. Suile t03. Salt Lake C~iy. Utah Ba101 Telephone: (807) 363455 Facs~mde. (SOt) 367~4a76 <br />Environmemal Services <br />