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Exhibit D CMLRB 112 Permit Application <br />Agile Srone Systems, Inc. <br />• A combination rail and truck haul road crossing across the Tallahassee Creek will be <br />constructed to access the Granite Quarry. Steel I-beams with concrete bulkheads on <br />either end of the crossings will be used. Rip-rap and bedding rock will be utilized on the <br />approaches to the stream crossings to prevent erosion. Two measures will be taken to <br />avoid impacting any flowing water or fish during installation. First, installation will try <br />to occur during the 5-6 months of the year when the stream is dry. Second, since the <br />engineered design avoids any direct installation of materials in [he stream having a 40' <br />wide clear span much wider than the stream regulazly flows, installation will mostly <br />avoid any direct impact on the stream. Traffic will use the pre-existing road across the <br />stream. The 2 end reinforced concrete piers will be built outside and away from any <br />flowing water. Once built, the steel beams will be placed overhead. All subsequent <br />crossing surface and rip rap placement will be outside of any flowing water. <br />Complete engineered drawings were designed by Verkaik & Associates, Engineers <br />(12/97) and aze enclosed. The Corp of Engineers and the Colorado State Department of <br />Wildlife have reviewed and approved the proposed crossing designs. A copy of their <br />respective comments follows. Complete watershed studies have been performed on the <br />Tallahassee and Current Creek drainages as well as the smaller watersheds impacting the <br />proposed granite quarry and sandstone quarry sites. (Verkaik 12/97) 10 and 100 yeaz <br />storm events were evaluated. These evaluations, with excess rainfall for safety factors, <br />were used to design the crossings and the storm water berms and ponds. Since the <br />• crossing structures are considered temporary structures removed at the end of mining, <br />Agile was advised by the Division of Minerals and Geology to assume a 10 yeaz storm <br />event to design the crossings (Verkaik Personal Communications Birhan 1 ]/97). This <br />does not mean that the crossings cannot handle much lazger storm events. It does mean <br />that the cleaz span of each crossing will allow all of the water calculated to come from a <br />10 year storm event and that lazger storm events will probably cause some minimal water <br />to go over the top of the crossings. <br />• <br />l2 <br />