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• RECEN~ <br />JAN ~ ~ 1UU0 <br />~~ Banks and Gesso, LLC <br />~~ <br />January 20, 2000 <br />Tom Schreiner <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />r(8o1o20 9 Fe~ewlp to uomni~i <br />oao~ ~ ~ Ndr <br />Q~/~~~'J~~t <br />RE: Tower Pit No. 1, Permit#M-77-436 nn <br />Technical Revision for Reclamation Changes and Costs ,~1 /~ -~'3 <br />Dear Tom, <br />As requested in your last site inspection report for the subject property, we are <br />submitting this Technical Revision on behalf of CAMAS Colorado, Inc. The <br />application fee of $150 is also enclosed. <br />The quantities for reclamation were obtained by reviewing the project files and <br />property surveys, as well as field measurements made during my site visits. <br />Six depths of the pit from grade to shale were measured on the current southern <br />mining area, resulting in an average depth of 28 feet. Similar measurements were <br />not possible in the northern area, due to water in the pit. Depth to shale of the <br />northern pit was also assumed to be 28 feet. The existing un-reclaimed slopes were <br />already approximately 1:1 slopes, so this material was incorporated into the material <br />required to finish the slopes to 3:1. Perimeters were measured from a recent aerial <br />photograph of the property. The operator anticipates a combination of dozer and <br />scraper work for much of the slope reclamation work. <br />Dewatering costs assume one month with two pumps to lower the water, then two <br />additional months with one pump to dry and reclaim the slopes. Appropriately sized <br />generators would be rented to power these portable pumps. <br />Grading and contouring acreage considered the entire maximum disturbed area, <br />while the seeding acreage and topsoil acreage did not include the bottom of the <br />ponds. Topsoil would be spread approximately 60 feet down the reclaimed slope <br />from the top of bank, to 10 feet below the anticipated final water elevation. <br />iii iiiiiuiiiiii iii <br />999 <br />Jrvision of Minerab & Geology <br />720 Kipling St.,Suite117 <br />Lakewood, Colorado 80215 <br />(303)274-4277 <br />Fax (303) 274-8329 <br />www. banksandgesso.com <br />