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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY ~~ <br />Department of Natural Resources <br />1313 Sherman St., Room 215 C ~ I,O IZAD 0 <br />Denver, COIOradO 80203 DIVISION O F <br />Phone: (303) 866-3567 M I N E~ RA L S <br />fAX: (303)832$106 <br />GEOLOGY <br /> REC LA NATION•NINING <br /> SAFETY•SCIENCE <br />~ <br />September 14, 2004 Bill Owens <br /> Governor <br /> <br />Greg Gibson Russell George <br />Executive Director <br />Greg Lewicki and Associates t/ Ronald W. Cattany <br />11541 Warrin ton Court <br />g Division Director <br /> Natural Resource Trustee <br />Parker, Colorado 80138 <br />;/ / :/ f <br />Re: Ha/dorson Sand and Grave/ Mine, Permit No. M-2003-037, AM-O1 Pie/iminary <br />Adequacy Review (PAR1. <br />Dear Mr. Gibson: <br />Staff has begun the review process on the above referenced amendment to the Haldorson <br />Pit. Please find listed below items that need clarification or correction as noted in this <br />PAR. <br />1) Per Rule 6.4.1(2), please provide the location of the main entrance to the site <br />reported as longitude /latitude or Universal Transverse Mercator (UTM) grid, <br />2) Map C-1 is very busy. Many key elements are lost or very difficult to discern. For <br />clarity, staff requests that the map be cleaned up some or possibly split the <br />information between 2 separate maps. Elevation lines can be reduced to every 10 <br />or 20 feet, there are some lines of unknown purpose and some of the text is lost to <br />background or clutter. Also, it is important to delineate which 40 acres are to be <br />removed from the original permit area. <br />3- On Map C-2, please denote if temporary berms will be placed along the southern <br />edge of Phases B-2,3 and 4. <br />4) Please clarify in PLS the exact ratio for the proposed temporary seed mix. <br />51 Staff questions why the operator will mine permit edges to 2:1 slopes and backfill to <br />3:1 for final slopes. Backfilling is expensive and mining to 3:1 will reduce the <br />overall bond liability up front. Perhaps the operator should evaluate the overall cost <br />of backfilling verses mining to 3:1 to obtain final grades. <br />6) The operator and owner are noted as wanting to possibly leave the areas around <br />certain existing houses for mining until the end of operations. Staff has no problem <br />with this option, however it brings up the following question and requirement. <br />Office of Office of Colorado <br />