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SECTION 02401 <br />DEWATERING <br />PART 1-- GENERAL <br />1.01 DESCRIPTION OF WORK <br />The work to be performed under this section shall include furnishing all equipment and labor <br />necessary to remove storm or subsurface waters from excavation areas in accordance with the <br />requirements set forth and as shown on the drawings. <br />1.02 APPLICABLE CODES, STANDARDS, AND SPECIFICATIONS <br />The dewatering of any excavation areas and the disposal of the water shall be in strict <br />accordance with the latest revision of all local and state government rules and regulations. The <br />Contractor shall obtain any required dewatering permit from the appropriate agencies prior <br />commencing dewatering operations. p to <br />PART 2 -- PRODUCTS (Not Applicable) <br />PART 3 -- EXECUTION <br />3.01 DEWATERING <br />The Contractor shall provide adequate equipment for the removal of storm or subsurface <br />waters which may accumulate in the excavation. If subsurface water is encountered, the <br />Contractor shall utilize suitable equipment to adequately dewater the excavation so that it will <br />be dry for work and pipe laying. A wellpoint system or other Engineer -approved dewaterin <br />preparation of the trench bottom and for pipe laying. Wellpoint holes shall be plugged with <br />method shall be utilized if necessary to maintain the excavation in a dry condition for <br />concrete grout. Dewatering by trench pumping will not be permitted if migration of fine <br />grained natural material from bottom, side walls, or bedding material will occur. In the event <br />that satisfactory dewatering cannot be accomplished due to subsurface conditions or where <br />dewatering could damage existing structures, the Contractor shall obtain the Engineer's <br />approval of wet trench construction procedure before commencing construction. Dewatering <br />shall cease in a manner to allow the subsurface water to slowly return to normal levels. <br />3.02 DISPOSAL <br />Water pumped from the trench or other excavation shall be disposed of in storm sewers having <br />adequate capacity, canals, or suitable disposal pits. Contractor is responsible for acquiring all <br />permits required to discharge the water and shall protect waterways from turbidity during the <br />dewatering operation. In areas where adequate disposal sites are not available, partial) <br />backfilled trenches may be used for water disposal only when the Contractor's plan for trench <br />disposal is approved in writing by the Engineer. The Contractor's plan shall include temporary <br />culverts, barricades, and other protective measures to prevent damage to property or injury to <br />any person or persons. No flooding of streets, roadways, driveways, or private property will be <br />permitted. Engines driving dewatering pumps shall bee equipped with residential type mufflers. <br />** END OF SECTION ** q <br />02401 -1 02401 Dewatering.doc <br />