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~,'' <br />' ~ . ~~~'~~ <br />. <br />I~~II~I~~~ <br />999 • <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Deparlmem of Nawral Resources <br />131 3 Sherman Sr .Room 215 +tl <br /> <br />Denver. Colorado 80203 I <br />~~~ <br /> <br />Phone. l30 )1 866-3567 II <br />FA% {)031 83? 8106 <br /> DEPARTMENT OF <br /> NATURAL <br />Date: June 8, 1995 RE$OLTiZCES <br /> <br />To: Paul Krabacher Ray Romer <br />governor <br /> lames 5 Eochhead <br />From • Kent Gorham <br />• &emlrve DirK for <br /> ~ Michael B, Lang <br />CC • David Berry Division Director <br />RE: Grassy Gap Maintenance Work, 1995, ,¢'C-81-039 <br />As I discussed with you, I am forwarding the enclosed map along <br />with a brief discussion of work to be done at the Grassy Gap mine. <br />For convenience, I have broken the area down into smaller areas and <br />have presented the discussion in the approximate chronological <br />order that we viewed them during your site visit. <br />Main entry Road (to Pit4 road intersection) <br />Work in this area consists of blading and crowning the road, <br />especially in those areas that show excessive rutting. Some inside <br />ditch work where the cut slope has sloughed into the ditch is <br />necessary. <br />Pit 4 Road <br />Road ditches here are showing <br />back to approximately 2.5:1 <br />roadway. Some road blading is <br />be "cleaned-up" and blended <br />ones. A small ditch needs to <br />at the toe of the large slide <br />on the toe drain). <br />Pond 4 area <br />downcutting and need bladed to shape <br />slopes, especially adjacent to the <br />necessary. Road cross-drains should <br />as necessary, especially the upper <br />be cut on the left turn in this road <br />(carefully due to the filter fabric <br />This area needs a minor amount of contour furrow repair above <br />section C of ditch 4-1. Sediment in this ditch section should also <br />be cleaned from the ditch below the contour furrow breach. The <br />pond riser needs sealed with a grout or similar material at the <br />junction with the outlet tube. <br />Main Entry Road (from Pit4 turn to Pond 5) <br />This section of road needs blading at some places on both the <br />inside and the outside sections to keep water in the ditches and <br />off of the road surface. Some areas of the cut slope are sloughing <br />