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r _ ~TA~ G~ COLORADO , III I VIII I IIIIII III DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 999 7313 Sherman 51., Room 215 D I v 15 1 0 N O F Dem-er, Colorado 80203 Rhone: l3o31866-3567 ~ MINERAL 5 FAX: 0031 83?8106 & GEOLOGY RECLAMATION April 30, 1999 MI NING•SAFETY Mr Martin Lind ell o~4~ens . Governor Poudre Tech Aegregates. Inc. 8200 Eastman Park Dr. creR E. ~roalcner L~ecmlee Director Windsor, CO 80550 M¢haei B. Long Dmnion Dueaor Re: Technical Adequacy Review of New 112 Application Permit #M-99-021, Stegner Far ms Pit Dear Mr. Lind, This letter is being written to address technical issues in }'our 112 Application Permit #M-99-021, Stegner Farms Pit. In accordance with Rules 3 and 6 of the Construction Materials Rules and Regulations, the following technical issues must be addressed before the Division of Minerals and Geology (DMG) can reach a decision regarding approval of your application: Exhibit D: Minine Plan I) On page 13 of the application, paragraph 2, the last line states: "These berms will be temporary, that is, when mining is complete, the berm material will be pushed into the mine mining to establish a sloped shoreline." Please clarify this statement, which appears to say that the berms will be pushed into the excavated pit. 2) The post-minine land-use must be slated before this application can be approved. It may be changed with an ~ amendment at some point in the future, if it becomes necessary to do so, but the bond can not be calculated without a commitmem to a particular reclamation plan. e/ 3) Copies o(the specifications for the slurry wall, the pond lining, the separation berm and the drainage system must be submitted and approved by the Division. Exhibit E: Reclamation Plan '~ 4) DMG requires that the results o(su(ficient physical and chemical soil analysis (as proposed on p. 21) be submitted to the Division if the Operator wishes to not be required to apply fertilizer to the site. Please commit to doing so alter the tests have been done. ~5) How many linear feet of the pit will he left as highwalls that will require backfilling at any one time'? Please specify, so we may calculate [he cost of backfilline. ~ 6) How many inches of topsoil will he replaced during reclamation? In Exhibit L, it is implied that this amoum will be 12", but please he explicit. Exhibit G: Winer Information ,7) No groundwater may be exposed umil after the Temporary Substitute Supply Plan currently being prepared is approved by the Office of the State Engineer (OSE). Until such time as it is approved, the Operator must tither commit to slaying two feel above the emundwatcr mble, or commit to backfilling the exposed area to two feet above the groundwater table, and post a bond sufficient to do.