2011-06-20_REVISION - C1981019 (23)

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PROFILE BRE, Construction i This road has been a designed to meet the disturbed area and p 1. The field engil as necessa 2. Maximum roar 3. Cross fall slop 4. Design width 5. Asphalt paven 16" thick be specificatio 6. A 6 foot high t 7. Roadway sign 8. Reflectors anc 9. Cut slopes sh, or less as 10. 11. 12. 13. Requirements ror rug ptacernem snau ue as specmcaoy uescnueu a+ pure w.va. i naui tloaus (3) (e) ttoaa emoanKmenrs are summarized below. ney eiamenrs or rnese requirements All vegetation material and topsoil shall be removed from the embankment foundation during construction. In addition, in areas where the existing ground s lope is 5h:1 v (20 percent) or steeper and the first lift of the embankment will be in soil material, the existing ground below the stripped and removed vegetation /topsoil layer shall be plowed or stepped before placing the first lift of embankment fill. In areas where the existing slope is steeper that 5h:1 v and the first lift of the embankment will be in bedrock, prior to placing the first lift of embankment fill a keyway shall be excavated into bedrock at least 2 feet in depth and at least 10 feet in width under the proposed embankment toe and continuing along under the embankment toe for as long as these conditions exist. The material for embankments shall be reasonably free of organic material, coal, frozen materials, wet or peat material, natural soils containing organic matter, or any other acid - producing or other material considered unsuitable for use. Material containing by volume less than 25 percent of rock larger than 6 inches in greatest dimension shall be spread in successive uniform layers not exceeding 12 inches in thickness before compaction. Where the material 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 conshructed in uniform layers not exceeding in thickness the approximate average size of the rock used. Each layer of the embankment shall be completed, leveled, and compacted before the succeeding layer is placed. Embankment layers shall be compacted as necessary to ensure that the embankment is 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 compaction. Embankment slopes shall not be steeper than 2H:1 V, except where the embankment material is a minimum 85 percent rock. In this case, s lopes shall not be siteeper than 1.3514:1V. Drainage from haul road shall be directed to the pit(s) wherever possible. All culvert outlets shall have riprap erosion protection installed. A ditch shall be installed at toe of all cut s lopes. If needed, temporary erosion control measures shall be implemented during construction to minimize sedimentation and erosion ulntfl permanent control measures can be established. The field engineer shall determine the need for control measures during construction. Such temporary and permanet control measures would include silt fences, straw bales, straw wattles, rock check dams, or other measures such as downstream sediment control /. ENGINEER'S CERTIFICATION 1, THOMAS C. PETERSON, being a Licensed Professional Engineer in the State of Colorado, do hereby certify that this map has been prepared to meet the applicable portions of Colorado DRMS Rule 4.03.1 for Haul Roads. 00 • L i v 'c C. PFr f 32257 0. ONAL THOMAS C PETERSON P.E No. 257 AD/ // DATE COLLOM HAUL ROAD PROFILE & ROAD TEMPLATE 0 r� Xj y Colowyo Coal Company 5731 State Highway 13 ice• Meeker, Colorado 81641 Foil 0 No. I REVISION PR -3 I COLLOM PERMIT SCALE: AS SHOWN DATE: 319109 DRWG. BY.. TCP -RW APPROVED BY: DRWG NO. MAP 25E Sheet 3 of 9 DATE BY 2/25/70 TCP PR -3 I Title block edit, construction note & culvert label edits 3119111 1 TCP