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satisfactory compaction, it shall be allowed to dry, assisted by discing or <br /> harrowing, if necessary, before compaction or filling effort is resumed. <br /> 3.3.7 Compaction or consolidation achieved by traveling trucks, machines and <br /> other equipment will not be accepted unless such procedures are <br /> approved by the Engineer and proper compaction density is achieved. <br /> 3.3.8 Embankments shall be constructed to such elevations as to make <br /> allowance for any settlement that may occur. Prior to the construction of <br /> any structure, roadway or other ground feature and before final <br /> acceptance of the Contract, the Contractor shall regrade the <br /> embankments to conform to the established lines and grades. <br /> 3.4 PROTECTION OF COMPLETED LIFT AND PREPARED GROUND SURFACE: <br /> After completion of a lift or ground surface preparation, all unnecessary traffic <br /> shall be kept off. Should it be found necessary to haul over the completed lift or <br /> prepared ground surface, the Contractor shall drag and roll the traveled way as <br /> frequently as may be necessary to remove ruts, cuts, and breaks in the surface. <br /> All cuts, ruts, and breaks in the lift or surface that are not removed by the above <br /> operations shall be repaired. Winter earthwork operations are common therefore <br /> can be performed satisfactorily by adopting certain procedures and taking <br /> prudent precautions. <br /> 3.4.1 Generally, earthwork operations can be conducted whenever the water <br /> being used to moisture condition the fill does not freeze prior to being <br /> mixed with the fill and, after mixing,the moisture-conditioned fill does not <br /> freeze prior to compaction or prior to placing the next lift. These <br /> conditions can obviously be met when temperatures are above freezing <br /> and can even be met when temperatures are below freezing due to direct <br /> sunshine and/or due to the fill material being warmer than the ambient <br /> temperature. The exact temperature and weather limitations can be <br /> determined by the Contractor and the Engineer as winter operations <br /> progress. <br /> 3.4.2 At the end of each work day, the exposed active fill area should be <br /> covered with a minimum six-inch thick, loose, dry lift of soil which will <br /> serve as an insulating layer to limit freezing. <br /> 3.4.3 At the beginning of each work day, the loose lift form the night before <br /> should be inspected for evidence of freezing. If any frozen soil exists, it <br /> should be removed to the full depth of freezing, even if frozen soil extends <br /> beneath the loose lift and into previously compacted soil. After removing <br /> frozen soil, the exposed surface should be scarified with a disk or <br /> pulvamixer. Earthwork operations can then proceed as normal. If the <br /> loose lift does not contain any frozen soil,then it can be moisture <br /> conditioned and compacted in place without the need for removing it. <br /> 3.4.4 Any portion of the fill which is not being actively worked but becomes <br /> subject to freeze/thaw cycles should be scarified and re-compacted prior <br /> to placing additional fill even if it is not frozen at the time work is resumed <br /> in that area. <br /> 02200-4 <br />