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Harding Lawson Assoelates <br />May I5, 1996 <br />C~ <br />Ms. Christine Johnston <br />Mountain Coal Company <br />West Elk Mine <br />Somerset, Colorado 81434 <br />RE: Silo HauU Access Road Certification <br />Dear Christine: <br />III IIIIIIIIIIIIIIII <br />999 <br />Harding Lawson Associates has reviewed the Silo HauUAccess Road for its certification as a haul <br />/access road acwrding to CDMG criteria. The criteria for haul access roads are 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.SH:1V. The road does not have an overall grade steeper than 10 percent and <br />does not have a pitch grade steeper than IS percent. The water wntrol system was designed to <br />safely pass the peak runoff from a 10 year 24 hour precipitation event. <br />If you have any questions, please give me a call. <br />• ~~ yours <br />Charles C. Rehn, P.E. <br />Salt Lake City Principal Engineer <br />u <br />~Qp40 <br />~~... <br />4 _. u <br />.8 ~ <br />~. a.: ~~. .,y <br />Engineering antl t55 Soum 300 `Nest, Swte t09, Sait LaMe Ciry, Utah t36tOt Talepnone: (B01) 363Aa55 Facsimile: (BOt) J63~a476 <br />Environmental Services <br />