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~ ~ III IIIIIIIIIIIII III STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 1 31 7 Sherman St.. Room 215 Denver, Colorado 80:03 Phone: (3031 8663567 FA%: (3031 83 2-81 06 December 1.2000 DIVISION OF MINERALS GEOLOGY RECLAMATION MI NING•$Af ETY Mr. Michael Loukonen Bill Owens Governor Loukonen Bros. Stone Greg E. Walther 12993 N. Foothills Hwy Executive D~recror Longmont, Colorado 80503 Michael B. Long Division Director RE: Loukonen Bros. Stone; File No. ^^-~~ ~~~Q2 Lykins Gulch; Adequacy Review #2 Deaz Mr. Loukonen, The Division received your response to the adequacy questions for the Lykins Gulch 110 Application, File No. M-2000-090. The Division has a few remaining questions that need to be addressed by the applicant prior to approval of the application. The applicant states that topsoil is almost non-existent on this site, and what is available will be mixed with the overburden. The mixing of topsoil and overburden is not a good reclamation practice because the topsoil contains biological agents that will support rooted plants necessary to achieve the reclamation goals. The operator will need to commit to segregating the topsoil and overburden piles as much as possible. In the long run, this will provide a more suitable plant growth medium and reduce the amount of topsoil that will need to be hauled in from off site. 2. It is the Division's understanding that the gulch will not be affected by the operation and only the hillsides will be quarried. Please be aware that any changes to this plan will need to be approved by the Division in the form of a revision to the permit. 3. If steep areas are not affected by the mining operation, then the natural introduction of trees is acceptable for the indicated portion of the reclamation plan. However, if an area is affected by the operation (i.e. quarry area, stockpile areas, staging areas and new access roads) the applicant will need to revegetate the area with the approved seed mixture. Hand seeding of an affected azea may be necessary if the land is too steep. Please respond. 4. The applicant states that more rock could be placed in the channel area as needed to provide a stable configuration. If additional rock is necessary, the applicant will need to locate the stabilized area on the map, specify the length, width and depth of rock to be used and the average size of the rock (or Dso• where the tiptop diameter in feet such that 50% have a smaller diameter than Dso)• The Division is currently reviewing the reclamation cost estimate for Lykins Gulch. Once the applicant responds to above-mentioned items, the Division can adequately estimate the bond. • •