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uwln�r', <br />PACIFICi <br />11ttp: / /www.uprr.com /aboutup/ operations /specs /i ndex.shtin]. <br />Also see Union Pacific Railroad/ Burlington Northern Railroad Common Standard Plan No. <br />710000, Sheet I of 1 and Plan No. 710001, Sheet 1 of 1. <br />Before beginning any work that would require shoring, as determined by the above <br />standards, the Industry shall provide detailed plans of the intended shoring. if the shoring <br />falls within Zones A or B the plans shall include design calculations. Plans and calculations <br />must be signed and stamped by a Professional Engineer; licensed in the state the work will <br />be done. <br />8.22.05 FOUNDATION, BEDDING AND COMPACTION - Pipe culverts shall be placed at <br />the flowline grade and elevation established by the Drawings and Specifications on a uniform bed <br />of stable earth or granular material such as sand or gravel (see UP Company Bridge Standard <br />Plan No. 680000, Sheet 2 of 2, this plan refers to steel pipe, but the Pipe Bedding section shall <br />also apply to concrete pipe). Such bedding shall be compacted to not less than 95% (Modified <br />Proctor) of maximum density as determined by ASTM D 1557, with moisture content adjusted as <br />necessary. The compacted bed shall contain the camber required by the Engineer or as covered <br />by the Specifications listed below in Section 8.22.06. The compacted bed shall be shaped to fit <br />the bottom of the pipe and shall conform to Class A, B or C bedding (see Table 10.33.4 bedding <br />factors) AREMA Specifications chapter 8 -10. Where granular material is used for bedding, the <br />ends of the pipe culvert excavation shall be sealed to prevent leaking and infiltration of water <br />along the pipe culvert. Such sealing can often be accomplished by blanketing the ends of the pipe <br />culvert embankment with well tamped clay. In all cases the ends of pipe culverts shall be <br />protected by riprap as outlined in Section 8.22.07 and the UP Company Bridge Standard Plan <br />No. 680000, Sheet 2 of 2, this plan refers to steel pipe but the riprap section shall also apply to <br />concrete pipe. <br />Where the flowline grade crosses areas of soft of soil, which will not provide a suitable uniform <br />foundation for the pipe culvert bed, the Industry shall excavate eighteen inches (18 ") below the <br />flowline grade for a width equal to twice the outside width of the pipe culvert. Prior to <br />backfilling, the Engineer shall inspect the excavation and the Industry shall perform any <br />additional excavation required by the Engineer. Upon completion of the excavation, the Industry <br />will baekfill such excavation with granular material, which shall be compacted and tested as <br />required. <br />When the flowline grade passes over rock, the Industry shall excavate such rock to a depth which <br />is at least six inches (6 ") below the flowline grade. The pipe culvert will not rest on rock at any <br />point. The Industry will baekfill excavations in rock with granular material, which shall <br />compacted and tested as required. <br />8.22.06 CAMBER - Camber shall be placed in all culverts were it is anticipated that the culvert <br />will settle as the result of high embankment construction or compressible foundation soils below <br />the culvert bedding. Unless otherwise specified by the Engineer, all culverts shall be cambered in <br />accordance with the following: <br />37 <br />