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<br />203.OS <br />(t) Potholing. All necessary potholing as deterrttined by the Contractor and agreed <br />to by [he Engineer shall be completed under [his item with appropriate <br />equipment as approved. <br />The Contractor shall acquire necessary permits, locate utilities, excavate all <br />materials of whatever character required to expose the utilities, survey the <br />location of the utilities, and backfill the excavation to existing grade lines with <br />the excavated or other approved materials. Backfilling shall be accomplished in <br />accordance with subsection 206.03. <br />The Contractor shall use extreme caution during [his work. All damage to <br />existing utility lines or adjacent facilities shall be repaired promptly a[ the <br />Contractor's expense. <br />203.06 Embankment. Embankment construction shall include preparation of the <br />aeeas upon which embankments are to be placed, construction of dikes, placing and <br />compacting of approved material within roadway areas including holes, pits, and other <br />depressions within the roadway area. Only approved materials shall be used in the <br />construction of embankments and fills. <br />Pree running water shall be drained from the material before the material is placed on <br />• the roadway. <br />The type of relative compaction required shall be as provided in the Contract, <br />Broken concrete, broken asphalt, or other solid materials more than 6 inches in <br />greatest dimension shall not be placed within embankment areas supporting the <br />roadway shoulders and pavement structure. These embankment areas are defined as <br />the cross-sectional areas of an embankment situated beneath the shoulders and <br />pavement structure and inside the lines projected downward and outward on a I:l <br />slope from the outside edges of the roadway shoulders to their intersection with the <br />base of the embankment. Broken concrete, broken asphalt, or other solid materials <br />more than 6 inches in greatest dimension removed on the project may be disposed of <br />in embankment side slope areas not supporting the roadway shoulders and pavement <br />structure, as defined above. These materials shall be placed in layers; the thickness of <br />each layer shall be less than 1'/~ times [he following maximum allowable dimensions. <br />Rocks and concrete shall not have any single dimension greater than 2 feet and asphalt <br />shall not have any single dimension greater than 12 inches. Each layer shall be <br />separated by a minimum of 6 inches of compacted and approved embankment <br />material. No layer shall be within the top 2 feet of the subgrade or final finished side <br />slope surface. These materials shall be placed as the embankment is being <br />constructed. Excavation of in-place embankment to accommodate disposal of <br />materials shall not be permitted. <br />When embankment is placed on a slope that is steeper than 4:1, as measured in [he <br />steepest direction, the embankment shall be continuously benched as the work is <br />brought up in layers. Benching shall be well keyed and, where practical, a minimum of <br /> <br />142 <br /> <br />I <br />