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RECEIVED <br />FEB 2 0 2002 <br />February 2Q 2002 Division of Mineralsand Geology <br />Ms. Kate Pickford <br />Environmental Protection Specialist LAND DELIVERED <br />Division of Minerals and Geology AGGREGATE <br />1313 Sherman Street, Room 215 INDUSTRIES <br />Denver, CO 80203 <br />Re: Permit No. M-1999-021 -Stegner Farms -Technical Revision TR-003 <br />Dear Kate: <br />Enclosed is the report prepared by Richard Henry of Scientech, Inc., entitled "Evaluation of the <br />Groundwater Conditions in the Vicinity of the Stegner Farm Gravel Mine Near LaPorte, Colorado." This <br />report delineates the areal extent of the effects of the slurry wall on groundwater in the area surrounding <br />the Stegner Farm Pit, as proposed in TR-003 and approved by the Division on February 1, 2002. <br />The conclusions contained in this report indicate that groundwater level changes attributable to the slurry <br />wall at this operation have neither triggered the events necessary to install a french drain, as provided <br />within the permit for this operation, nor has their been a violation or failure to operate within the <br />requirements specified in CRS-34-32.5-I 16(4)(h) and (i). <br />While the report concludes that no mitigation is warranted or recommended at this time, Aggregate <br />Industries has committed to deepen the existing well of area neighbor Darwin Roe, in an effort to address <br />groundwater level decreases resulting from the combination of local factors as noted in the report. <br />Deepening Mr. Roe's existing well to bedrock will provide him with access to an additional nine to ten <br />feet of groundwater Upon notice from Mr. Roe that he is ready for us to proceed, we will move forward <br />with that commitment. <br />Upon your review and analysis of the within report, please advise me if you have any questions or need <br />additional information. I would be happy to arrange a meeting with Mr. Henry as well, if this would be of <br />benefit to the Division. <br />Very truly yours, <br />~~/~~ ~ <br />~ ~"~ - ~ Permit #: irJ-/~?-I/-~2/ Confidental?: <br />Connie Nickle Davis Class:_ T,~ <br />Su ort Services Re resentative From: TYPe-Seq.: s <br />PP P Doc. N~e~'~~ S.,-/ To: ,r~7/ <br />- l~ucY r ~ c)~ytr~n c <br />Enclosure Doc. Date (if no date stamp): a/~,/nz <br />cc: Rob Helmick, Lazimer County Planning <br />Richard Henry, Scientech, Inc. <br />Paul Banks, Banks and Gesso LLC <br />Aggregate Industries-WCR, Inc. -Mike Refer, Pat Ward, Norm Roche, Tom Maul <br />Aggregate Industries <br />West Central Region, Inc. <br />3605 South Teller Street <br />Lakewood, CO 80235 <br />Connie Nickle Davis, Support Services <br />P. O. Box 337231, Greeley, CO 80633 <br />970-336-6526 Faz: 970-378-6856 <br />Telephone: 303-985-1070 An Equal Opportunity Employer <br />