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• Response to DMG comr~s regarding Technical Revision 1 submittal <br />Loveland Ready Mix Concrete, Inc., M-2001-022, TR-1 <br />January 15, 2002 <br />Page 2 <br />In addition, the location of a monitoring well in close vicinity to a mining cell would be <br />problematic, with a significant potential for spurious results that directly reflect the influence of <br />dewatering operations but do not accurately reflect the effects of dewatering (or lack thereof) <br />on the surrounding groundwater table. Following from the known direction of groundwater flow <br />across the site (USGS study), the three wells currently established at the site provide blanket <br />coverage of the area of potential influence for Green/Croissant dewatering operations. In any <br />case of groundwater depletion on nearby properties, the data provided by these three wells <br />should be sufficient to make a determination that groundwater mitigation measures are or are <br />not triggered under the proposed mitigation plan. <br />Mining Cell 4 Reconfiguration <br />3.) There has been some confusion regarding the Mining Cell 4 Reconfiguration, due to an error <br />on the Weiland Sugnet exhibit included in Appendix 9 of the Technical Revision 1 submittal. <br />This was clarified in my January 10'" voicemail to the DMG (T. Schreiner) and your January <br />11'" voicemail in confirmation. For the record, the Weiland Sugnet exhibit is to be referenced <br />for the purposes of floodplain and floodway delineation, but is not accurate or updated as to <br />either the reconfiguration of Mining Cell 4 or the use of the mitigation cell south of Cell 3. <br />Revised Exhibits C-3 and F do accurately depict the reconfiguration of Mining Cell 4, and <br />Loveland Ready Mix Concrete, Inc. will again reiterate - as found in the Mining Commitment <br />on page 4 of the TR -that all mining excavation at the Green/Croissant Property will occur <br />outside the delineated floodway. <br />We have not yet received official comment from the DMG regarding the slope evaluation materials <br />submitted with the Technical Revision. However, please note that, prior to submitting the slope <br />model and analysis with the TR, our office worked extensively with Mr. Allen Sorenson of the DMG <br />to derive an evaluation package that would meet with DMG standards. This preliminary review <br />began no later than September 2001 and continued up to the date of the current TR submittal. At <br />this juncture, we must hope that Loveland Ready Mix will not experience delays in the approval of <br />its Technical Revision due to the slope evaluation. If there is any clarification or additional <br />information needed under this item, please do not hesitate to contact myself or Ross Horvath, P.E. <br />at Banks and Gesso, LLC (303/274.4277). <br />I sincerely appreciate your help in defining and providing comment on this Technical Revision. <br />Loveland Ready Mix expects the Green/Croissant site to be a top-notch project; and with the <br />DMG's feedback over the course of the approval process, I believe that will happen. <br />Please call me at 303/274.4277 if you have any questions or needs regarding the current <br />Technical Revision. <br />Sincerely yours, <br />~~ <br />BA KS AND GESSO, LLC <br />Alex Schatz <br />enclosure <br />cc: Steve Faucher, Loveland Ready Mix Concrete, Inc. <br />20023 -Agency Correspondence <br />