2020-04-24_REVISION - M2016030 - Laserfiche WebLink

Home Browse Search

iv A April 8, 2020 //Hi fit/flit, Mr. Peter Hays Colorado Division of Reclamation, Mining and Safety 1313 Sherman St. Room 215 Denver, CO 80203 Re: Request for Technical Revision Importation of Inert Fill Mr. Hays, Brannan Sand and Gravel Company, L.L.C. is submitting the attached Request for Technical Revision Importation of Inert Fill. This request is consistent with initial Regular Operation 112 Mining permitting for M-2016-030 Valley's Edge Resource. As is noted in the Summary of the original permit application, backfilling is necessary to achieve post- mining land use as industrial property and that backfilling will be accomplished by utilizing a combination of on-site cut and fill, construction materials and imported inert fill. This letter and Request for Technical Revision Importation of Inert Fill are to notify the DRMS that the inert fill operation will commence in 2020. The duration of the inert fill operation is estimated to last between 5 and 15 years, although the duration will be very dependent on market demand over that period of time. The estimated quantity of material to be imported is between 2 and 3 million cubic yards. Initially, excavations will be filled in, including areas above and below the groundwater table, followed by filling and overlot grading using imported materials to achieve a desirable grade for post mining industrial use. Only materials meeting the definition of inert materials from the DRMS Construction Materials Rules shall be accepted. Construction Materials Rules Definition: Inert Material means non-water-soluble and non-putrescible solids together with such minor amounts and types of other materials, unless such materials are acid or toxic producing, as will not significantly affect the inert nature of such solids. The term includes, but is not limited to, earth, sand, gravel, rock, concrete which has been in a hardened state for at least sixty(60)days, masonry, asphalt paving fragments, and other inert solids. All loads shall be screened prior to import. Some materials, such as recyclable concrete and asphalt, may be segregated and processed for beneficial use. Materials of sufficient size to potentially create a void will be reduced to a smaller size prior to placement as fill. Materials will be placed in layers to mitigate settling and voids. Some compaction will be achieved through the operation of heavy equipment on the filled surface, however compaction may or may not proceed according to a particular compaction specification. Please let me know if there are any questions. Sincerely, Joshua Oliver Environmental Manager Brannan Sand and Gravel Company, L.L.C. (303)472-1736 joliver(a_brannanl.com 2500 East Brannan Way I Denver I CO 80229 1303.534.1231 Tel 1303.534.1236 Fax www.brannanl.com