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.. t: <br />Fs <br />HART ENVIRONMENTAL <br />P .O. Box 4 303 Boulder, Colorado 80306 Phone: 303.444.6602 <br />December 15, 2010 <br />Mr. David Bird <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, Colorado, 80203 <br />Re: DRMS Permit # M-1987-049 (Bromley Lakes) <br />Dear David: <br />On September 8, 2010 Bill Timmons and I met with you and Tony Waldron at <br />Ready Mixed Concrete Company's (RMCC) Bromley Lakes sand and gravel pit in <br />Brighton. The purpose of our meeting was to discuss, among other things, RMCC's <br />proposed Technical Revision (TR) to the above referenced DRMS Permit for Bromley <br />Lakes. <br />During the course of our discussion, you and Tony expressed an number of <br />concerns regarding possible adverse groundwater impacts related to mining and <br />reclamation along the west side of Brighton Road adjacent to the part of the Bromley <br />Lakes Pit commonly referred to as the Archuleta, Remoehl and Arends (ARA) parcels <br />(mining stages 12, 13, 14, 16 and 17) including the Spier incolding parcel. <br />Historically, neighbors have been concerned about impacts to their alluvial wells <br />along Brighton Road. As a result, RMCC has focused on ground water drawdown <br />impacts and how best to protect alluvial wells located in the area. In addition, a secondary <br />concerned was expressed by the previous owners of the McCann Ditch regarding <br />mitigation of impacts to ground water hydrology related to the McCann Ditch. <br />During the Division's recent review of Amendment 002, to the Bromley Lakes <br />DRMS Permit, staff asked RMCC to address a number of concerns about possible ground <br />water impacts associated with mining and reclamation west of Brighton Road. <br />In an Adequacy Review Letter dated May 14, 2009 staff requested information regarding <br />the following:. <br />"How many total wells will be used to monitor ground water levels? Please display <br />the location of the wells on the Exhibit G Water Information map. Please state how <br />often these wells will be monitored (monthly, quarterly, etc.)? Also, Please describe <br />what actions will be taken if the five foot trigger point is breached at the monitoring <br />wells? For example, who will be notified and how will the problem be mitigated? <br />Wetlands Banking <br />Environmcutal Nianagcment <br />Land Use PlauniiW <br />Reclamation Design <br />n .. .. 7 .