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11111!1 <br />Q� 1-1 <br />i <br />r <br />Ai <br />:389? <br />.134 5� <br />v i <br />1 <br />5. i I <br />4251 <br />1 <br />TYPICAL HAUL ROAD CROSS SECTION <br />A <br />7700 7700 <br />120 Ft Min. - <br />7650 7650 <br />, — R oad Surfaced with 1 to 1.5 inches of crushed gravel. <br />(See Item 5 of Note) <br />7600 \ 7600 <br />7550 ` Tnongulor Ditch 7550 <br />(See Item 12 of Note) <br />7500 7500 <br />7450 7450 <br />7400 7400 <br />400 200 0 200 400 <br />STA 25+00 <br />i 100' <br />LEGEND <br />OUTSIDE HAUL ROAD TOPO <br />INSIDE HAUL ROAD TOPO <br />HAUL ROAD DESIGN TOPO <br />PIT LIMITS PER MAP 23 AND MAP 23A <br />SCALE 1 " = 200 FT <br />2017 0 200' 400' <br />1 <br />25 +00 <br />7900 <br />7800 <br />7700 <br />7600 <br />7500 <br />5.3 <br />7400 <br />7300 <br />30 +00 35 +00 40 +00 45 +29 <br />Construction Notes: <br />This road has been designed to meet the applicable portions of Colorado DRMS Rule 4.03.1 for Haul Roads. It is specifically <br />designed to meet the applicable regulations as well as Rio Tinto internal road design guidelines while minimizing additional <br />disturbed area and preventing environmental damage. This design specifically covers those portions of the road which are <br />"Out of Pit" and defined by the pit boundary shown by the legend. For those portions of the roadway within the pit area, <br />normal haul road construction practices apply. Other design requirements are shown below. <br />1. The field engineer shall have the discretion to move the road centerline horizontally a distance of up to 200 feet in any direction <br />as necessary to meet field conditions as long as the slopes and widths are maintained. <br />2 • Maximum road grade is less than 10% as shown on the profile. <br />3. Cross fall slopes between centerline and road shoulders shall be between 1 and 2 percent as directed by the field engineer. <br />4. Design width shall be as shown on the cross - section. <br />5. Upon completion, the entire running surface of the road shall be surfaced with approximately 1 to 1.5 inches of rock or crushed gravel for traction. Additional <br />crushed gravel surfacing shall be reapplied as necessary throughout the life of the roadway. <br />6. A 6 foott high berm shall be used at all locations where the roadway is elevated. <br />7. Roadway signage shall be added as appropriate. <br />8. Reflectors and Guideposts shall be installed as appropriate per Rio Tinto road standards. <br />9. Cut slopes shall be 0.5H :1V or less when completed incompetent rock. Cut slopes in unconsolidated materials shall be laid back at 1.5H. <br />or less as directed by the field engineer. <br />10. Requirements for fill placement shall be as specifically described in Rule 4.03.1 Haul Roads (3) (e) "Road embankments ". Key elements of these requirements <br />are sumrmarized below. <br />All vegetation material and topsoil shall be removed from the embankment foundation during construction. The existing ground shall be plowed, stepped, or <br />keyed in as required by this regulation. The material for embankments shall be reasonably free of organic material, coal, frozen materials, wet or peat material, <br />natural soils containing organic matter, or any other material considered unsuitable for use. Material containing by volume less than 25 percent of rock larger <br />than 6 inches in greatest dimension shall be spread in successive uniform layers not exceeding 12 inches in thickness before compaction. Where the material <br />for an embankment consists of large -size rock, broken stone, or fragmented material that makes placing it in 12 inch layers impossible, the embankment shall be <br />constructed in uniform layers not exceeding in thickness the approximate average size of the rock used. Each layer of the embankment shall be completed, <br />leveled, and compacted before the succeeding layer is placed. Embankment layers shall be compacted as necessary to ensure that the embankment is <br />adequate to support the anticipated use. Material shall be placed in an embankment only when its moisture content is within acceptable levels to achieve design <br />compaction. Embankment slopes shall not be steeper than 2H: 1V, except where the embankment material is a minimum 85 percent rock. In this case, slopes <br />shall not be steeper than 1.35H:1V. <br />11. Drainage from haul road shall be directed to the pit(s) wherever possible. <br />12. A ditch shall be installed at toe of all cut slopes. See Volume 2C, Exhibit 7, Item 14Q for ditch design. <br />13. If needed, temporary erosion control measures shall be implemented during construction to minimize sedimentation and erosion until permanent control measures <br />can be established. The field engineer shall determine the need for control measures during construction. Such temporary and permanet control measures <br />would include silt fences, straw bales, straw wattles, rock check dams, or other measures such as downstream sediment ponds. RECEIVED <br />JUN 15 2005 <br />meciam <br />Mining and Safety <br />SOUTH TAYLOR HAUL ROAD <br />ENGINEER'S CERTIFICATION <br />N I, THOMAS C. PETERSON, being a <br />Licensed Professional Engineer in SCALE: AS SHOWN <br />the State of Colorado, do hereby • DATE: 02103109 <br />certify that this map has been prepared Colowyo Coal Company DRWG. BY: TCP RWFIESI <br />to meet the applicable portions of Colorado 5731 State Highway 13 <br />DRMS Rule 4.03.1 for Haul Roads. rJ Meeker, Coi«ado 81641 APPROVED BY.. <br />� <br />• <br />W E DRWG NO. <br />MAP <br />25C <br />``,`, � P p011L <br />32257 z • <br />S G it 7/09.7 �� No. REVISION DATE BY CHK <br />CONTOUR Oy 200 9TERVA 5 FT ��� IONAL •�;`� ```` TR -76 New Map for South Taylor Haul Road 02/03/09 TCP TAT <br />11111 <br />rTR-76 Edits to Notes per review comments, ditch hydraulics, 06/12/09 TCP TAT <br />update topography data, logo edits <br />7900 <br />7800 --� <br />7700 <br />7600 <br />7500 <br />7400 <br />7300 <br />0 +00 <br />9.6% <br />8.8% <br />HAUL ROAD PROFILE <br />8.1% <br />5 +00 <br />10 +00 <br />15 +00 <br />20 +00 <br />1 <br />Al <br />