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i <br />7 5 <br />A' <br />1 "= 200' <br />HAUL ROAD PROFILE <br />7900 7900 <br />7800 ��•s %0 7800 <br />- -- - _ - - - -- 8.8% <br />7700 <br />7700 <br />-- - - --� - - <br />�— <br />7600 7600 - - -- <br />7500 -- - - -- 7500 <br />7400 <br />7400 <br />7300 7300 <br />0 +00 5 +00 10 +00 15 +00 20 +00 25 +00 30 +00 35 +00 40 +00 45 +29 <br />111=200' <br />TYPICAL HAUL ROAD CROSS SECTION <br />A A• <br />7700 <br />7650 <br />TOWN <br />7550 <br />7500 <br />7450 <br />7400 <br />400 <br />LEGEND <br />200 0 <br />STA 25 +00 <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 />200' 0 200' 400' <br />1 " =100' <br />200 <br />7700 <br />7650 <br />7600 <br />7550 <br />7500 <br />7450 <br />7400 <br />400 <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 />disturbers 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 D foot 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-,1V <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 summarized 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 orpeat 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.-IV, 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 pB(s) whereverpossible. <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. <br />RECEIVED <br />JUN 152009 <br />Mining and Safety <br />SOUTH TAYLOR HAUL ROAD <br />ENGINEER'S CERTIFICATION <br />1, THOMAS C. PETERSON, being a I� <br />Licensed Professional Engineer in SCALE: AS SHOWN <br />the State of Colorado, do hereby DATE. 02/03/09 <br />certify that this map has been prepared O Colowyo Coal Company DRWG. BY.' TCP- RWF /ESI <br />to meet the applicable portions of Colorado I,..] 5731 S,Ce a Highway 3 APPROVED BY <br />DRMS Rule 4.03.1 for Haul Roads. N, <br />W E ORWG NO MAP 25C <br />0f'L <br />`. PFlF% Poi O <br />No. REVISION DATE BY CHK <br />2. <br />CONTOUR FN ERV A 5 ���Fj7� /ON"1P�,`` TR -76 New Map torSouth Teybr Haul Road 02/03/09 TCP TAT <br />Edits to Notes per review commams, ditch hydraulics, <br />TR-76 Update topography data, lobo edits 06/12/09 TCP TAT <br />