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¦ <br />HART ENVIRONMENTAL <br />P.O. Box 1303 Boulder, Colorado 80306 Phone: 303.444.6602 <br />December 15, 2010 <br />Mr. Tony Waldron <br />Colorado Division of Reclamation, Mining and Safety / <br />1313 Sherman Street, Room 215 r DEC 2 0 2010 <br />Denver, Colorado, 80203 E)"n*Ova of R*cltxa Won, <br />? 40 WaS rind fthoV <br />Re: DRMS Permit No. M-1987-049 Technical Revision (Bromley Lakes) <br />Dear Tony: <br />The purpose of this letter is to request approval of a Technical Revision -TT) of <br />Ready Mixed Concrete Company's (RMCC) Bromley Lakes DRMS Permit (# M-1987- <br />049). Specifically, the requested TR releases RMCC from the requirement of installing a <br />"`French Drain System" to maintain the ihistoric groundwater regime supplying the ditch. <br />On ovem er , 2009 the Division of ec amation, hung and Safety (the <br />Division) approved Amendment 002 (AM-2) to RMCC's Bromley Lakes sand and gravel <br />mining operation. The Division's approval stipulated that: <br />"Ready Mixed Concrete Company shall not disturb the McCann Ditch and land within <br />200 feet of the McCann Ditch until they have submitted and received approval from the <br />Division of a Technical Revision with plans for the French Drain System. *** The <br />Technical Revision shall contain engineering plans and details about the location of the <br />French Drain System that will be installed to transmit groundwater to the ditch to <br />maintain the groundwater regime supplying the ditch. Also, the operator will need to post <br />sufficient financial warranty to cover the cost of the installation of the French Drain <br />System. <br />OR <br />The operator will need to submit and receive approval of a Technical Revision showing <br />the French Drain System is not necessary. <br />***This stipulation shall not apply to areas mined adjacent to the McCanne Ditch <br />originally permitted for relocation under the existing and currently approved mining and <br />reclamation plan. " <br />Wetlands Banking <br />Environmental Management <br />Land Use Planning <br />Reclamation Design <br />Permitting & Zoning <br />