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<br />III liiillliilllliil <br />PETER C. LIEN (7898-1969) <br />CHARLES H. LIEN-PRESIDENT <br />BRUCE H.LIEN-CHAIRMAN OF THE BOARD <br />PETE LIEN-C.0.0. <br />C O~ LO RA ~ O CRUSHED LIMESTONE • GYPSUM • CALCIUM FEED SUPPLEMENT• SILICA SAND <br />Non-Metallic Minerals A Division of Pete Lien & Sons <br />P.O. Box 1961 P.O. Box 440 <br />Fort Collins, CO 80522 Rapid City, SD 57709 <br />303/493-6294 605/342-7224 <br />Fax: 303/490-1063 Fax: 605/342-6979 <br />~- ~ C O' M PA N Y located 19 miles North of Fort Collins near Owl Canyon located at Interstate 90 & Deadwood <br />Mr. Allen Sorenson March 1, 1994 <br />~ Reclamation Specialist <br />Colorado Department of Natural Resources <br />~.: Division of Minerals and Geology <br />^~ 1313 Sherman Street RFr~ <br />t~". Denver, Colorado 80203-2273 -.F7i <br />Re: Weaver Quarry, Permit Number M-89-010 n~,,. ~R 0 <br />Technical Revision TR-002, Adequacy Revie6S~~ 299 <br />°%4,,, ~ <br />Dear Mr. Sorenson, ~~~~%~. <br />~~,"' <br />This letter is intended to address the items -~ <br />contained in the Technical Revision for the Weaver Quarry <br />on which you have requested further information. <br />1. Reclamation Costs <br />This revision calls for a change to the reclamation <br />method allowing mining to take place up to the permit <br />boundary, maximizing the recovery of reserves. <br />Recontouring along the permit boundary will be accomplished <br />by backfilling and grading instead of reclamation blasting. <br />Colorado Lien Company will commit to having no more than <br />400 lineal feet of unbackfilled highwall along the 112 <br />Permit boundary at any point in time. This will allow <br />reclamation to be carried out as stated in the current plan <br />with the only deviation being the need to move backfill <br />material of sufficient quantity to recontour and backslope <br />along a 40 foot highwall 400 feet in length maximum. At a <br />2 horizontal to 1 vertical final grade, this calculates <br />into 60 cubic yards per lineal foot, or a maximum of 24,000 <br />cubic yards of back fill material required at any one time. <br />The average haul or push distance for this material would <br />1, be 500 feet. <br />The access road leading to mining phases in the <br />southwest portion of the quarry would be included in the <br />total disturbance and reclaimed as documented in the <br />current reclamation plan. <br />A~ <br />