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0,411.....~a~~yyY~~E q® <br />h9.~~ ~ .J LWL <br />• Access Road Crossing <br />p,,,,,,,,, ,,, ,.:,:,argils and 9001uDY <br />~E~E~1/E® <br />~~~~~ <br />DlWabn of Srmuals oad DeypDY <br />The proposed access road crosses the existing railroad tracks, "at grade", as shown in <br />Figure 1. We anticipate the crossing will be constructed of precast and prestressed <br />concrete such as that specified by UP Exhibit L (Reference 2). From the proposed <br />intersection with Lime Road, the road extends north towards the rail tracks. Low <br />earthfill approach embankments will be constructed on both sides of the tracks to <br />accommodate the crossing. The crossing design will account for the surface water <br />drainage requirements of the existing railroad tracks and meet UP and BNSF design <br />guidelines (Refs. 1 and 2). The approach embankments will have side slopes and <br />drainage that meet Pueblo County and CDOT design guidelines (Refs. 6 and 7). The <br />approach embankments will not adversely impact stability of the existing railroad tracks, <br />as they will form buttresses, perpendicular to the tracks. No permanent "below grade" <br />excavations will be required. Conduits beneath or through the embankments will be <br />provided, as directed by the fiber optic utility companies. Preliminary locations of <br />drainage culverts are shown in Figure 1. Typical sections for the access road, <br />developed to meet the design guidelines are attached as Figure 3. <br />Rail Spur <br />The proposed rail spur connection to the UP and BNSF railroad tracks is illustrated in <br />• Figure 2. The approach to the railroad connection will consist of a confluence <br />excavation that blends into the horizontal and vertical alignment of the existing tracks. <br />The existing surface water drainage will be maintained or rerouted and the connection <br />will be designed to meet UP and BNSF design guidelines (Refs. 1 and 2). Preliminary <br />locations of drainage culverts are shown in Figure 2. Cut slopes will be designed per <br />UP and BNSF guidelines. Fiber optic utility conduits will be provided, as needed, <br />beneath the rail spur confluence to protect the lines from possible impacts of <br />construction or operation of the spur. The design and depth of the conduits will be <br />subject to approval by the fiber optic utility companies, but will at least be below the <br />depth of soil disturbance during construction and at a suitable depth to fully protect the <br />fiber optic lines from future disturbances. Typical sections for the rail spur, developed <br />to meet the design guidelines are attached as Figure 4. <br />Impacts on Stability of Railroad Tracks and Fiber Optic Lines <br />Based on the preliminary designs for the access road crossing and the rail spur <br />connection, we conclude that the planned structures will not adversely affect the stability <br />of the existing railroad tracks owned by the UP and the BNSF or the fiber optic lines <br />owned by Owest and MCI Worldcom. Standard railway and roadway design guidelines <br />are being used to develop the designs, which account for cut and fill slopes and offsets, <br />and surface water drainage. Conduits for rerouting fiber optic lines will be incorporated <br />• into the designs of each feature in coordination with the fiber optic utility companies. <br />The conduit crossings will prevent disturbances to the fiber optic lines during <br />construction and operation of the Red Rock Project. <br />2 <br />