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B. Water pumped from the trench or other excavation shall be disposed of in storm sewers having adequate capacity, canals or suitable disposal pits. CONTRACTOR is responsible for acquiring all permits required to discharge the water, and shall protect waterways from turbidity during the dewatering operation. In areas where adequate disposal sites are not available, partially backfilled trenches may be used for water disposal only when the ENGINEER approves the CONTRACTOR’s plan for trench disposal in writing. The CONTRACTOR’s plan shall include temporary culverts, barricades and other protective measures to prevent damage to property or injury to any person or persons. No flooding of streets, roadways, driveways or private property will be permitted. Engines driving dewatering pumps shall be equipped with residential type mufflers. 3.08 PUMPING A. Pumping from the interior of any foundation enclosure shall be done in such a manner as to preclude the possibility of any portion of the concrete materials being carried away. No pumping shall be done while concrete is being placed, or for a period of at least 24 hours thereafter, unless it is done from a suitable pump separated from the concrete work by a watertight wall. 3.09 BACKFILLING A. Backfill Materials: 1. Backfilling to the original ground surface or subgrade surface of openings made for structures, with a sufficient allowance for settlement, shall be a part of the work of excavation, although the ENGINEER may require that the material used in making the backfill be obtained from a source entirely apart from the structure. All material used for backfill shall be of a quality acceptable to the ENGINEER, and shall be free from large lumps, wood, or other extraneous material. 2. Heavy construction equipment will not be permitted to cross over culvert or storm sewer pipes until backfill material has been placed and compacted to the finished earthwork grade or to an elevation at least 2-1/2 feet above the crown of the pipe. B. Compaction Under Wet Conditions: 1. Where wet conditions do not permit the use of mechanical tampers, compaction of the backfill shall be done with hand tampers. Only A-3 material will be allowed for use in the hand tamped portions of the backfill. When the backfill has reached an elevation and condition such as to make the use of the mechanical tampers practicable, the mechanical tamping shall be done in such a manner and to such extent as to transfer the compaction force into the sections previously tamped by hand. City of Sunny Isles Beach NE 174th Street Roadway Improvements 02630 - 15 Storm Drainage 14-1758 / 09-19-2014