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UNION <br />PAC1F #C' <br />Industry shall repair any damage to, or deterioration of, pipe bedding prior to installation, to the <br />satisfaction of the Engineer. <br />The Industry shall comply with all current and applicable Federal, State and local rules and <br />regulations governing the safety of men and materials during pipe culvert excavation, <br />installation and backfilling operations. The Industry shall observe requirements of the <br />Occupational Safety and Health Administration relating to excavations, trenching and shoring as <br />set forth in Title 29, Part 1926, Subpart Paragraph P, Sections 1926.650 through 1926.653, Code <br />of Federal Regulations, and any subsequent revisions. See also Section 8.21.04 below. <br />8.21.04 SHORING - When working near UP tracks, temporary shoring may be required. UP's <br />"Guidelines for Temporary Shoring" can be found on the Internet at: <br />http:,,',wwu,. ui)rr.com /aboutup /operat ions /specs /index.slitinl. <br />Also see Union Pacific Railroad/ Burlington Northern Railroad Common Standard Plan No. <br />710000, Sheet 1 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 />8.21.05 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 gravel or sand, (see UP Bridge Standard Plan <br />No.680000, Sheet 2 of 2) and such bedding shall be compacted to not less than 95% (Modified <br />Proctor) of maximum density determined by ASTM D 1557 with moisture content adjusted. The <br />compacted bed shall contain the camber required by the Engineer or as covered by the <br />Specifications listed below in Section 8.21.06. Where the granular material is used for bedding, <br />the ends of the pipe culvert in embankment shall be sealed to prevent leaking and infiltration of <br />water along the pipe culvert. Such sealing can often be accomplished by blanketing the ends of <br />the pipe culvert embankment with well tamped clay. In all cases, the ends of pipe culverts shall <br />be protected by riprap as outlined in Section 8.21.07 and the UP Company Bridge Standard <br />Plan No. 680000, Sheet 2 of 2. <br />Where the flowline grade crosses areas of soft 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 twice the outside width of the pipe culvert. Prior to backfilling, <br />the Engineer shall inspect the excavation and the Industry shall perform any additional excavation <br />required by the Engineer. Upon completion of the excavation, the Industry will backfill such <br />excavation with granular material which shall be compacted and tested as required. <br />When the flowline grade passes over rock, the Industry shall excavate such rock to a depth, which <br />is at least twelve inches (12 ") below the flowline grade. Excavations in rock shall maintain <br />sufficient area so that the pipe culvert will not rest on rock at any point. The Industry will <br />32 <br />