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SOUTHWEST <br />LAND SERVICES, INC. <br />RECEIVED DEC 2 3 2008 <br />Office <br />JAN 0 8 2009 ;::dam rcion, <br />&tjjjFsjg and Safety <br />Division of Reclamation, <br />,Kate Pickford Mining and Safety, 23 December, 2008 <br />Colorado Division of Reclamation, Mining & Safety <br />Durango Field Office <br />691 CR 233, Unit A-2 <br />Durango, CO 81301 <br />RE: Four Corneas Materials: Bayfield Pit # 1, AM-06 Application <br />File No. 1987-038 - Response to Adequacv Review <br />Dear Ms. Pickford: <br />The following is in response to your letter of December 9, 2008 regarding adequacy <br />review items. The responses are listed in the same numerical order as presented in your <br />letter. <br />Rule 6.4.4 Exhibit D = Mining Plan <br />1. It is anticipated "based on recent and on going groundwater measurements (see <br />item 2 below) that ground water will be encountered in the southern reaches of <br />Phases 4 and 7. The outer perimeter-highwalls in these areas will be mined at no <br />more than a 2.5:1 slope. Where mining will occur internally and link with existing <br />mined areas there will be no highwalls. The maximum acreage of exposed <br />groundwater in the amended phases (4 and 7) is estimated to, be 7.4 acres. These <br />areas are shown on the attached Phase Map prepared by WWE in preparation for <br />a water supply plan. Please note the phasing for the water supply plan is not the <br />same as. the mining phases shown on Exhibit D. <br />2. The applicant has drilled 5 groundwater monitoring wells throughout the entire <br />property. Well # 1 is located in the northwest cornef of Phase 7.•Measurements <br />(depths to groundwater) taken since October of this year at this well site indicate. <br />very little variation. The applicant requests that should monthly background <br />measurements vary by less than one meter. over three quarters that mining be, <br />allowed to commence. <br />. <br />s <br />LAND USE PLANNING & PERMITTING <br />P.O. BOX 2673 DURANGO, COLORADO 81302 • PHONE: 970-259-2629 FAX: 970-259-0181 <br />E-mail: swlsinc@frontier.net <br />