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¦ <br />HART ENVIRONMENTAL <br />P.O. Box 4303 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 <br />Denver, Colorado, 80203 <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 (TR) 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 historic groundwater regime supplying the ditch. <br />On November 12, 2009 the Division of Reclamation, Mining 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 McCarme 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 McCann Ditch <br />originally permitted for relocation under the existing and currently approved mining and <br />reclamation plan. " <br />bl,'etlands Banking <br />Environmental Management <br />Land Usc Planning <br />Reclamation Design