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III IIIIIIIIIIIII III ^..~_d•if'r_:`~: ` ._ ..:~~ x,;,;- <br />999 -. , . ! l7 +... .. J iti .' J <br />.... ; ~ <br /> <br />ANDESI'TE <br />R O C K C O M P A N Y <br />QUARRY: OFFICE: <br />P.O. Boz 625 ~ 313 South Phillips <br />Lyons, Colorado 80540 Sioux Falls, 5. D. 57102 <br />303-043.3490 605-334-5000 <br />November 16, 1981 <br />Mr. James McArdle <br />Mined Land Reclamation <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 80203 <br />RE: Andesite Rock Company - File #77-191 <br />Dear Mr. McArdle: <br />In response to your request fbr information on the above referenced <br />permit. 2 am submitting the following: <br />1. The joint structures of the andesite are predominantly <br />verticle. The horizonal distance between these joints <br />averages about 2'~ to 3'. (see photo) <br />2. The final quarry face will not be benched. As shown on <br />drawing 677-3, the final slope of the rock face will lay <br />at approimately '~ horizonal to 1 vertical. <br />3. It is our feeling that this slope will be sufficient to <br />preclude an unstable face. The Colorado Division of <br />Highways cuts thru rock embankments are 1. The over- <br />burden section that lays above the rock face will be <br />sloped at 3 horizonal to 1 vertical. <br /> <br />4 <br />i <br />