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G.M. NAGEL <br />STRUCTURAL ENGINEERING <br />FAOILITY ENGINEERING <br />PROJECT REVIEWS AND PROPERTY REPORTS <br />March 28, 1990 <br />~ III IIIIIIIIIIIIIIII <br />sss <br />Mr. G. Scott Briggs, Esquire <br />532 South Weber Street <br />Colorado Springs, Colorado 80903 <br />Re: Road Debris / Culvert NR-6 <br />Dear Scott, <br />• <br />CONSULTING ENGINEER <br />MEMBER AMERICAN SOCIETY OF CI W L ENGINEEAS <br />MEMBER AMERICAN SOCIE fY OF MEC MANICAL ENGINEERS <br />MEMBER INTERNATIONAL CONFE RENCE OF BUILDING OFFICIALS <br />FT ~ P .I., fl f~! <br />1AR 29 139Q <br />v11NECl LAh:G <br />{FG? RMA7!CtA! n"'" ~ 'a <br />Thank you for your letter of reply dated March 22, 1990. I would like: to <br />respond to your letter. <br />First, quarry origins predating the neighboring developments do not legitimize <br />acts of trespass, and acts of damage to neighboring properties. Whether one <br />culvert or one hundred culverts are installed along the access road, eaeter <br />flow will carry and erode stored waste products downstream. I find i!; <br />unconscionable that Castle Concrete, the hiLRD, and your director of <br />reclamation have knowledge of this erosion problem, have had that knowledge <br />since May of 1989, and have not pursued correction of the problem con:aistent <br />with the four recommendations in my letter of March 14, 1990. For thl; record <br />the hailstorm which precipitated the latest erosion end sedimentation event <br />occurred March 5-6, as opposed to the March 1-2 date in my earlier le{:ter. <br />With regards to the final design analysis for HR-6, Snyder Quarry, CAI', dated <br />February, 1990, I would propose a fifth option subject to acceptance Icy ell <br />parties. The fifth option is a refinement of option four appearing on page <br />five of that report, excerpts are included herein. I would recommend that the <br />safety berm be gunited or concrete surfaced to prevent the "erosion, I~reach, <br />end uncontrolled flow down the slope to Cedar Neights Drive", Black C+3nyon <br />Road. At the access road gate location this flow would be collected in new <br />catch basin and culvert traversing the road to the existing 54" diameter <br />culvert location. This refinement avoids "flow that bypasses the facilities <br />would continue down the roadway causing silt deposition and flooding". Please <br />note that past silt deposition would have been minimal if the storage piles <br />were removed from the access road. The responsible party for culvert <br />maintenance is an area I have not researched and therefore have no comments. <br />Majestic Building Colorado SF rings, Colorado 80903 <br />7 East Bijou, Suite 214 Phone (719) 577-9797 <br />