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Mountain Region AGGREGATE 1687 Cole Boulevard Phone:303-985-1070 <br /> INDUSTRIES Suite 300 Fax:303-716-5299 <br /> Golden,CO 80401 www.aggregate-us.com <br /> June 21, 2018 RECarucl) <br /> Mr. Amy Eschberger C <br /> Environmental Protection Specialist JUN , 6 1018 <br /> Division of Reclamation,Mining and Safety DMSION�RKLAJWAT <br /> 1313 Sherman Street, Room 215 ION <br /> Denver, CO 80203 OWW SARTY <br /> Re: Notice of Material Imported for Backfill,Permit No. M-1977-141 —Lyons Quarry <br /> Dear Ms. Eschberger: <br /> In accordance with Construction Material Rule 3.1.5(9),the following is provided in support of this Notice: <br /> (a) Inert fill material was obtained from the Resilient St.Vrain Restoration Project within two miles <br /> downstream of the Lyons Quarry. This material is riverbed material and(1)was excavated to increase the <br /> ability of the floodplain to handle flood events without causing damage to nearby properties and(2)to <br /> make permanent repairs to the quarry access road. The off-site material was accepted in accordance with <br /> Aggregate Industry's "Inert Material Acceptance Policy" a copy of which is enclosed. This material will be <br /> incorporated into the reclamation of the quarry operated under MLRB 112c Permit No.M-1977-141, <br /> located at 1605 Old St.Vrain Rd, Lyons, Colorado in Boulder County.RMC Consultants completed the <br /> work for Boulder County. <br /> (b) The volume of inert material imported and backfilled as set forth in (a) above was a total 29,405 cubic <br /> yards. This included 27,522 cubic yards of material from Resilient St Vrain Project placed Aug-Oct 2017 <br /> and 1,883 cubic yards of material from access road to quarry placed May 2018. <br /> (c) Enclosed is the agreement between Aggregate Indsustries and Boulder County including an affidavit <br /> certifying that the material imported was clean and inert, as defined in Rule 1.1(20). <br /> (d) Importing of fill material started in August 2017 and was completed in May 2018. <br /> (e) The imported material was placed in the West Fill Area of the quarry as shown in Exhibit A. <br /> (f) The material was placed and stabilized in accordance with the approved reclamation plan. In general <br /> material was dumped, spread out in lifts that did not exceed three feet and run over with tracked vehicle to <br /> eliminate void spaces. Compaction testing was completed by Cesare, Inc. in Centennial, Colorado. <br /> If you have any questions regarding this notice please contact me at(719)239-0974. <br /> Very truly yours, <br /> aj ��� <br /> Joel Bolduc <br /> Regional Land and Environment Manager <br /> Encl: <br /> Exhibit A <br /> Exhibit B <br /> Delivering Value A member of the Holcim Group <br />