Laserfiche WebLink
<br /> <br />121 1. Sorl Embankment. Soil embankment shad consist predominantly of materials smaller than <br />122 4.75 mm (No. 4) sieve in diameter. Soil embankment shall be constructed with moisture <br />123 density control in accordance with the requirements of subsection 203.07. ' <br />124 <br />125 2. Rock Embankment. Rock embankment shall consist of materials with 50 percent or more <br />126 by weight, at field moisture content, of particles with least dimension diameters larger <br />127 than 4.75 mm (No. 4) sieve and smaller than 6 inches. Rock embankments shall be <br />128 constructed without moisture density control in accordance with the requirements of <br />129 subsection 203.08. ' <br />130 <br />131 (b) Rock Fill. Rock fill shall consist of sound, durable stones, boulders, or broken rock not less <br />132 than 6 inches in least dimension. At least 50 percent of the rock used s11a11 have a volume of <br />133 2 cubic feet or more, as determined by physical or visual measurement. <br />134 <br />135 Claystone or soil-like nondurable shale, as defined by Colorado Procedure 26, shall not be <br />136 treated as sound rock and shall be pulverized, placed, and compacted as soil embankment. <br />137 <br />138 Claystone or soil-like non-durable shale particles greater than 12 inches in diameter shall not be <br />placed in the embankment. <br />139 <br />I40 Construction Requirements ' <br />141 203.04 General. The excavations and embankments shall be finished to smooth and uniform <br />142 surfaces conforming to the typical sections specified. Vaziation from the subgrade plan <br />143 elevations specified shall not be more than 0.08 foot. Where bituminous or concrete surfacing <br />144 materials aze to be placed directly on the subgrade, the subgrade plane shall not vazy more than <br />145 0.04 foot. Materials shall not be wasted without written permission of the Engineer. Excavation <br />146 operations shall be conducted so material outside of the slope limits will not be disturbed. Prior ' <br />147 to beginning grading operations, all necessary cleazing and grubbing in that area shall have been <br />148 performed in accordance with Section 201. <br />149 ' <br />150 The Contractor shall notify the Engineer not less than five working days prior to beginning <br />151 excavation so the necessary cross sections may be taken. The Contractor shall not excavate <br />152 beyond the dimensions and elevations established. Archaeological and paleontological materials ' <br />153 encountered during the work shall be dealt with in accordance with subsection 107.23. <br />154 <br />155 203.05 Excavation ' <br />156 (a) Rock. Unless otherwise specified, rock shall be excavated to a minimum depth of 0.5 foot <br />157 and a maximum depth of 1 foot below subgrade, within the limits of the roadbed. Rock <br /> <br />158 <br />removed in excess of 1 foot below subgrade will not be paid for. Bac:kfilling of the depth in ' <br />159 excess of 1 foot below subgrade shall be at the Contractor's expense. Approved embankment <br />160 material shall be used to bring the rock-excavated areas to subgrade: elevations within the ' <br />161 tolerances specified in subsection 203.04. <br />162 <br />163 Undrained pockets shall not be left in the rock surface and depressions shall be drained at the ' <br />164 Contractor's expense. Any change to cut slopes by the Department will be made prior to the <br />165 next drilling operations. <br /> <br /> 3-4 <br /> G \101\001 00.OMVteporls\NP\TeMniCal SpeciLraeons Ca FeErwry 3, 2006 <br />I~ <br />