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RECE~~lE® <br />GpNTOVR ~ contour Consulting Engineering,LLC <br />~~ ~ ~ P.O. Box 555, 108 Bear Creek Lane <br />CONSULTING ~ Morrison, Colorado 80465 <br />ENGINEERING D'rrision of Miaewls and Geology Ph/fax: 303 697-2655 <br />Contourengineer@aol. com <br />James D. Gill, P.E. <br />MEMO 6 February 2002 <br />To: Brian McGill, Environmental Manager <br />GCC Rio Grande Inc. <br />11783 State Highway 37, Tijeras, NM 87509 <br />From: James D. Gill, P.E. <br />Subject: Potential Impacts of the Red Rock Project Access Road Crossing and <br />Rail Spur on stability of Burlington Northern Santa Fe Railway and the Union <br />Pacific Railroad Tracks and associated utility lines. Project No. 001-030. <br />This memo addresses potential impacts of the Red Rock Project on the stability of the <br />existing Burlington Northern Santa Fe Railway (BNSF) and Union Pacific Railroad (UP) <br />tracks and utilities that lie in their corridor. The two lines run adjacent to each other and <br />share the same ballast/suballast embankment. Within the rail corridor, fiber optic lines <br />run parallel to the tracks. There are two locations with respect to the proposed project <br />construction where the existing railroads and utility lines will be impacted: <br />(1) the location where the access road crosses the railroad tracks (Figure 1); <br />~ (2) the location where the rail spur connects to the railroad tracks (Figure 2) <br />General Approach <br />The proposed construction for each feature consists of building either low approach <br />embankments or excavations that will adjoin the existing railroad tracks and match the <br />existing grade. The access road crosses the tracks in a perpendicular manner, at <br />grade, and the rail spur connection blends into the horizontal and vertical alignment of <br />the existing tracks, through a confluence excavation. The rail spur is being designed to <br />meet UP, BNSF, and A.R.E.A. general guidelines for industrial tracks (References 1,2, <br />and 3). The access road is being designed to meet Pueblo County and C.D.O.T. design <br />guidelines (References 6 and 7). At the location where the access road crosses the <br />railroad tracks, railroad design guidelines will be applied to the crossing design. At the <br />locations where the access road or rail spur cross fiber optic lines that run alongside the <br />tracks, coordination with Qwest and MCI Worldcom during final design and "field <br />locations" prior to construction will take place to ensure the proposed construction does <br />not affect the lines. Conduits for rerouting the fiber optic lines will be provided. Typical <br />design cross sections have been completed and are attached as Figures 3 and 4 <br />(References 4 and 5). <br />