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I I I I I I I I 'i . t I I , , I . I - 600-3 EXCAVATED MATERIAL shall be piled in a manner that will not endanger the work and that will avoid obstructing sidewalks, driveways and drainage. Gutters shall be kept clear or other satisfactory provisions made for street drainage. WID'l'H OF TRENCH may vary with, and depend upon, the depth of t.rench and the nature of the excavated material encountered; but in any case, shall be of ample width to permit the pipe to be laid and jointed properly and the backfill to be placed and compacted properly. The minimum width of unsheeted trench for pipe less than 10 inches shall be 18 inches and for pipe 10 inches. or larger, at least two foot greater than the diameter of the pipe, except by consent of the ENGINEER. The maximum clear width of the trench at the top of the pipe ~hall not be more than two feet greater than tbe outside diameter of .the pipe. Unless otherwise specified on the plans, all pipe will be placed in a flat bottom trench with tamped backfill~ The sides of the trench shall slope back to provide a stable slope for the partioular type of soil in the trench. If the trench is excavated to a greater width than authorized, the ENGINEER may direct the CONTRACTOR to provide a higher class of bedding, a higher strength pipe or both, than that required by the Contract, without additional compensation therefore, as the ENGINEER may deem necessary to satisfy the design requirements. PAUDrr'GRADE of the trench below grade lines shall be corrected with approved material, thoroughly compacted without additionai compensation to the CONTRACTOR. . SOLID ROCK EXCAVATIONS shall include such rocks as ar. not decomposed, weathered or shattered and which will re~ire blasting, barring, wedging or use of air tools for removal. Under this classification shal~ be included the removal of any concrete or masonry structure (except concrete pavement, curb pavement, curb and gutter and sldewalk) that cannot be removed by the standard trenching equipment. The removal of individual boulders shall be defined as solid rock excavations sheer the size of boulders shall be defined as solid rock excavation where the size of boulders exceeds two cUbic y~rds. LOOSE ROCK EXCAVATION shall include all stratified rock, sand- stone, cemented gravel, shale and boulders not otherwise defined as solid rock, regardless of how removed. BLASTING for excavation will not proceed until the CONTRACTOR has notified th$ ENGINEER 'of the necessity to do so. This' notification shall 'in no matter relieve the CONTRACTOR of the hazards and liability contingent on blasting operations. The hours of blasting will be fixed by ,the ENGINEER. Any damage caused by blasting shall be repaired by. the CONTRACTOR at his ,:, expense. The CQ~~CTOR's method of procedurE! relative to b~astinq sha~l conform to local and state laws and municipal ordinapces.