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- ~ III IIIIIIIIIIIII III <br />999 <br />'RittleApplegate,lnc. <br />Consultants (or Land, Mineral and Water Development <br />November 19, 1996 <br />Ms. Christina Kamnikar <br />Division of Minerals & Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Technical Adequacy Response for ivf-96-060; Firestien Pit <br />Deaz Christina: <br />RECEIVED <br />NOV 2 0 1996 <br />Division of nnneraiS 8 GeDI09Y <br />This letter will serve as our response to your Technical Adequacy Review dated November 18, <br />1996. <br />A) Fina! Lake Area. Exhibit E of our report states 80 acre of lake which includes both the <br />shallow and deep lake areas. Exhibit G of our report notes 56.3 acres of open water <br />needing augmentation for evaporation. R'e expect that most of the shallow lake area will <br />be overgrown with cat tails, bullrush, and other aquatic plants. The State Engineer does <br />no[ require augmentation for evaporation on water which is covered by plants. Thus both <br />figures for lake area are correct in the context they aze used. <br />B) Maximum Angle of Excavation. The operator will excavate the deposit to form more <br />traditional highwalls for a short period of time. "fhus Exhibit L needs to be revised to <br />show the cost of pushing material into [he pit to form the 3:1 and 2:1 side slopes. With <br />this letter you will find a calculation sheet determining the volume of material needed to <br />backfill the active mining area of two acres. Also you will find a revised Exhibit L <br />showing an increase in the proposed Financial Warranty to $115,533. <br />This letter and its enclosures aze being sent by fax with a hard copy to follow. Please call me if <br />you have any further questions. <br />Cordially, <br />TUTTLE APPLEGATE, INC. <br />ary J the <br />GJT/ r <br />Encs. <br />cc: File #96-138A <br />Jeff Gregg, Hall-Irwin Construction <br />0:196/38Lyrladegrm.ln <br />11990 Grant Street, Suite 410 • Denver, Colorado 60233 • (303) 452-6611 • Fax (303) 452-2759 <br />