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~~ • • iii iuiiiiiuiu iii <br />A Gilbert F, Rindahl, P.E. <br />Ann B. Hodgson <br />Rindahl & Associates ~ P.O. Box 24166 ~ 2180 S. Ivanhoe Street ~ Denver, Co 60222.0168;~~§~~~2~,~I~1gN to '1daQ 'OIOD <br />NOIJ.VNb'l~?N ~1NY/l Q3NIN! <br />April 20, 1682 <br />Mr. Jay Lucas <br />Reclamation Specialist <br />Mined Land Reclamation Division <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, CO 80203 <br />Re: Morrison Quarry - Second Amendment <br />Fiie Number 73-21 <br />Dear Jay: <br />Z861~1~ ~'dC <br />C73~~;~~,~~ <br />The following discussion is provided in response to your adequacy letter <br />of March 3, 1982. <br />Exhibit D - Mining Plan <br />~. The blasting technique will be the same as for the original permit. <br />2. Drainage diversion II modified will be used. Further study has been <br />completed by Water Resource Consultants which will provide a better drain- <br />age system. This will be a slight modification of alternative II. A copy <br />of this study is attached. <br />This system will divert drainage either around the mining area or use the <br />upper portion of the mining area to channel water into the natural streams. <br />/3. Overburden from the first mining phase (bench) will be temporarily <br />stockpiled immediately adjacent to the working area. As soon as the first <br />bench provides sufficient space, the overburden will be used to backfill <br />the bench to provide the "built-up" portion of the bench as shown in the <br />bench cross section of the reclamation plan. Please understand that only <br />-the top three or four benches wil} be backfilled iri this ways. This is to <br />help mitigate the visual impact of the mined area for residents who may be <br />able to see the results of the mining. As the mining progresses, all of <br />the overburden will be taken from newly mined areas directly to the areas <br />undergoing reclamation. <br />Resource Engineering 8 Environmental Services <br />'s~"~~: <br /> <br />