2014-12-29_PERMIT FILE - M2014043 (3)

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'EI)viroI)n) cI)t, C. LARRY E.O'BRIAN 7985 VANCE DRIVE,SUITE 205A FOUNDER ARVADA,COLORADO 80003 STEVAN L.O'BRIAN 303-423-7297 PRESIDENT FAX 303-423-7599 December 24, 2014 Dr. Tyler O'Donnell ivision of Reclamation, Mining & Safety 1313 Sherman St., Suite 215 Denver, CO 80215 Dear Tyler; REDEWED RE: Albert Frei and Sons, Inc. DFr 9 2014 Hatchery Pit -,M-2014-043 ,dequacy Review 03 DIVISION OF RECLAMATION MINING AND SAFETY On behalf of my client Albert Frei and Sons, Inc., I am responding to your second adequacy review letter dated December 19, 2014. I have included your review points that need to be addressed in the order presented so the questions and answers will be in the same document for easy reference. 6.4.5 EXHIBIT E -Reclamation Plan 15) Please clarify how the inert material will be placed into the pit. It is DRMS's understanding that the applicant plans to place inert fill into the pit in two separate main phases. The first phase the applicant will place inert material from the pit floor to roughly 10 below the final site elevation. The second phase will consist of placing fines and other material to bring the site to the final elevation. DRMS would request the applicant place both phases of the inert fill in 2 to 4 foot lifts. DRMS believes this method would help mitigate void space and settling. In Phase 2, backfilling will begin on the east side of the mined area and work west until the area is fill. The plan is to place the inert material, as it is delivered to the site, on the edge of the hole and push it in. Frei plans to fill to within 10 feet of the final elevation with the raw fill as it is delivered. Once a level enough area is created they will begin to creates a stockpile of well graded material from the delivered loads for future use or it will be placed on the areas that will not be redisturbed, until the final grade is reached. Frei will not agree to doing multiple lifts on the fill area from the shale to within 10 feet of the final grade in Phase 2. On the upper 10 feet where the material is better sorted and consists of well graded material Frei will agree to placing the material on 2 to 4 foot lifts. 30) Please provide a seeding rate for the western wheatgrass described in option 2. In the application, the applicant stated in the reclamation plan for option 2 that they would like to request release of the site after seeding has occurred. DRMS will not release the site until there is well-established vegetation to control erosion or the site is being developed as commercial or industrial land. Please change the permit text to reflect that.