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j-C.OLORADO <br /> Division of Reclamation, <br /> Mining and Safety <br /> J n:v tru t of titur is Ro sour, <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br /> Rule 1.1(24)/1.1(20) "Inert Material" means non-water-soluble and non-putrescible solids <br /> together with such minor amounts and types of other materials, unless such materials are acid <br /> or toxic producing, as will not significantly affect the inert nature of such solids. The term <br /> includes, but is not limited to, earth, sand, gravel, rock, concrete which has been in a hardened <br /> state for at least sixty days, masonry, asphalt paving fragments, and other inert solids. <br /> **Rebar or other protruding reinforcements must be removed prior to placement. All material <br /> must be buried to a minimum of 3 feet below final surface grade. <br /> 1. General Description of material to be imported: Scrap brick called grog <br /> 2. Approximate volume of inert material to be backfilled: -20,000 tons <br /> 3. Estimated dates of commencement: August 2020 and completion: August 2070 <br /> 4. Use/purpose of imported material:Backfill for the pit <br /> 5. A general engineering plan stating how the material will be placed and stabilized in a manner <br /> to avoid unacceptable settling and voids. <br /> The grog will be placed in 1-5 foot lifts, blended with the current overburden materials and compacted during <br /> reclamation <br /> Enclosed is a map showing the proposed location of the inert material. <br /> 3.1.5(9)(c) -Affidavit <br /> I Harold Stickler of General Shale Brick, Inc. hereby <br /> certify that only clean and inert material will be imported at Chieftain South Mine <br /> All material will adhere to the Division's definition of Inert Material as defined in Rule <br /> 1.1(24)/1.1(20). <br /> Signature: Date: <br /> -2- <br />