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Y ~ JEROME GAMBA & ASSOCIATES, INC. CONSULTING ENGINEERS & LAND SURVEYORS 113 9TH STREET, SUITE 214 P.O.00X 7459 GLENWOOD SPRINGS. COLORADO 01602-1459 PHONE: (9701945-2550 FAX: (97019ISI410 Colorado Division of Minerals and Geology Depamnent of Natural Resources 1313 Sherman Street, Room 215 Denver, Colorado 80203 • III IIIIIIIIIIIII III 999 July 19, 1999 Re: Permit Number M 81-207, NEW MINE PLAN, SUBMITTED AS A TECHMCAL REVISION TO ORIGINAL PLAN A.) GENERAL On 10 December 1998. Mr. Gregg Squire and Mr. Cazl Mount of the Division of Mines and Geology visited the operation. In the course of discussion with the owner, it was determined that a new mine plan should be prepazed and submitted as a Technical Revision to the original plan which was submitted in 1981. In compliance with this determination, Jerome Gamba and Associates were retained to prepaze an "existing conditions" map of the operation and prepare the new mine plan. The site was surveyed using GPS equipment and a 3-foot contour interval topographic map was prepared. Cross-sections were prepazed on 200-toot intervals across the site and the quantities of gravel and overburden were computed, considering alternative co~gurations for the final reclamation surface. The foilowing discussion describes the anticipated procedure for the completion of mitring and reclamation of the site. As illustrated on the Site Map (as of survey date 2-18-99), the gravel mining is advancing toward the eastern end of the permit area. The mining operation has advanced to the southern permit boundary, as defined by the top of the natural ridge, and overburden/topsoil has been placed along the southern side of the pit to achieve a final surface for reclamation with an approximate slope of 2.5 horizontal to 1 vertical. A substantial stockpile of overburden topsoil is present in a pile, approximately 200 feet wide by 1,200 feet long, along the north permit boundary on the east end of the permit. Processing plant systems and material stockpiles occupy the existing bottom of the pit between stations 8+00 and 26+00. The scale house and equipment maintenance facilities aze located adjacent to the southern permit boundary between stations 29+00 and 30+00. The existing pit bottom slopes from west to east and ranges in elevation from 6,175 to 6,140. B.) MINING PLAN of oravel reserves and overburden quantities indicate that sufficient is available to allow for the mining of gravel and reclamation of the pit as :rein and illustrated on the attached sheet ofcross-sections.