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~~ ~T , iii iiiiiiiiiiiiiiii <br />V6ering, ~llurth & associates <br />Consulting Civil Engineers <br />Registered Land Surveyors <br />1015 Elkton Drive • Colorado Springs, Colorado 80907 • Phone (719) 531-6200 • Faz (719) 531.6266 Ezt. 3 <br />Mined Land Reclamation Division <br />Department of Natural Resources <br />1313 Sherman Street, Room 213 <br />Denver, Colorado 80203 <br />Attn: Mr. Steve Renner <br />Mr. Dan Hernandez <br />Gentlemen: <br />~~~~~yE® <br />August 13, 1990 <br />AUG 1 S 19.q~ <br />MIMED l.gNv <br />Re: Snyder Quarry~Frl AMAiTi{)N f)IVic~~,~, <br />CAP Remedial <br />Action Changes, Area #3 <br />On behalf of the Operator, Castle Concrete Company, we are addressing a <br />proposed modification to the approved Corrective Action Plan (CAP) for the <br />Snyder Quarry. This change involves the remedial action to a disturhance <br />identified as Area #3 on the exhibits. <br />Without reciting all of the past history or details, it has been determined <br />by the Operator's Contractor and confirmed by their Geotechnlcal Consultant, <br />CTL-Thompson, that the regrading of the entire Area #3 to a 2:1 slope ins not <br />practical. It is probably not even possible without causing further damage to <br />the slope or existing vegetation. <br />Our survey crew has revisited the site, conducted more detailed cross <br />section work, and has taken six lateral cross sections (perpendicular to the <br />original cross section line) on the upper portion of Area #3. The results of <br />this additional field investigation have been condensed into a 2' interval <br />contour map from the crest down to approximately station 1+70. The <br />topography is shown as dashed existing contours on the attached Exhibit A. <br />The reshaping of Area #3 is proposed to be accomplished by removing as <br />much material as is practical from the crest down to and including a portion <br />of the "bulge" near midslope. The appearance of the "bulge" has been created <br />by a series of grade breaks between the crest and midpoint. <br />The regrading of the upper portion oP Area #3 will result in a 2.1:7. net <br />slope as measured along the original cross section line and will vary to match <br />the existing undisturbed natural slopes at each edge of Area #3. The lower <br />portion of Area #3 will remain in its current condition resulting in an overall <br />net slope from top to toe of Area #3 as measured along the cross section line <br />of 1.7:1. This is only slightly steeper than the original natural slope (pre-road <br />construction) of 1.8:1 which was determined by extension of the cross section <br />Into undisturbed areas above and below Area #3. <br />