2012-049 RES ACCEPTING BID AND APPROVING NOTICE OF AWARD FOR TDRA CDBG #729599 SEWER SYSTEM MANHOLE IMPROVEMENTS PROJECT IN COP TO B BRAY CONSTRUCTION

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requirements in the drawings for density requirements. Do not permit compaction equipment to contact and damage the pipe. Use compaction equipment and techniques that are compatible with materials used and location in the trench. Before using heavy compaction or construction equipment directly over the pipe, place sufficient backfill to prevent damage, excessive deflections, or other disturbance of the pipe. See minimum cover requirements elsewhere herein. Pipe Embedment shall be compacted in 8" lifts or less. All excavations sha11 be backfilled to finished grades, shapes, and configurations as shown on the drawings. Finish backfill, after consolidation, shall not have a variance of over one inch in ten feet when measured with a straight edge perpendicular to the slope. Any subsequent settlement of finished areas shall be brought back to the final grade and configuration with additional material as required, so that upon the completion of the construction of the project, and for the twelve month maintenance period, all areas shall have their final grade and shape. The CONTRACTOR, during the life of this contract, shall be responsible for so maintaining the trench and trench backfill as to permit safe passage for vehicles and pedestrians over the same. During inclement weather, he sha11 be responsible for removing any vehicle or livestock which may become stuck, stalled, or stranded in a trench, or in trench backfill, and shall utilize every available means to keep trenches and trench backfill across public thoroughfares and driveways safe and passable at all times. Initial backfill, i.e., that backfill material used to a point 6 to 12 inches above the top of the pipe, shall be the same material as the embedment material. Unless otherwise noted on the drawings, the final backfill may be the native material removed from the trench, except that rock removed from the trench must be reduced to a size no larger than 3" maximum dimension before reuse. Broken concrete larger than 3" in maximum dimension, trees, or other lumpy materials, or materials frozen, or of a perishable, spongy, or otherwise improper nature shall never be used in the backfill. Consolidation of cohesionless material by watering (jetting or puddling) should only be used under controlled conditions when approved by the ENGINEER. At all times, conform to the lift thicknesses and minimum density requirements in the drawings. To preclude damage to the pipe and disturbance to pipe embedment, a minimum depth of backfill above the pipe should be maintained before allowing vehicles or heavy construction equipment to traverse the pipe trench. For embedment materials installed to the minimum densities required in the drawings, provide cover (that is, depth of backfill above top of pipe) of at least 30 in. (0.8) or one pipe diameter (whichever is larger) before allowing vehicles or construction equipment to traverse the trench surface. All pressure conduits shall have a minimurn cover as follows: 3" diameter and smaller - 30"; 4" thru 8" - 36"; and 10" and larger - 42", as measured from the natural ground surface to the top of the pipe. Pressure pipe bury in unstratified rock may be raised 6" upon authorizarion from the ENGINEER. Notwithstanding the above, all pipe rnust be buried a minimum of 36" below all highway and railroad borrow ditches. 83