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CITY OF EVERETT SPECIAL PROVISIONS , <br /> DIVISION 7 — DRAINAGE STRUCTURES, STORM SEWERS, SANITARY SEWERS, , <br /> WATERMAINS, AND CONDUITS <br /> 7-08 GENERAL PIPE INSTALLATION REQUIREMENTS I <br /> 7-08.1 Description <br /> Further supplement 7-08.1 as follows: I <br /> 7-08.1(1) Submittals <br /> Provide Type 2 Working Drawings for all materials and Standard Plans. ' <br /> Provide Type 3E Working Drawings for dewatering plans, if any. <br /> 7-08.2 Materials <br /> Delete material items listed in 7-08.2 and substitute the following: <br /> Provide materials meeting the following requirements: <br /> Foundation Material Class A or B 9-03.17 Standard Specifications , <br /> Gravel Borrow 9-03.14(1) Standard Specifications <br /> Controlled Density Fill 2-09.3(1)E Special Provisions <br /> Crushed Surfacing Base Course 9-03.9(3) Standard Specifications <br /> 7-08.3 Construction Requirements <br /> 7-08.3(1) Excavation and Preparation of Trench <br /> 7-08.3(1)A Trenches <br /> Revise the second paragraph in 7-08.3(1)A and to read as follows: <br /> Excavate trench in accordance with COE Standard Drawing No 614. <br /> Delete the second sentence in the third paragraph in 7-08.3(1)A and substitute the <br /> following: <br /> Contractor may excavate above the top of the pipe zone only as wide as <br /> necessary to meet OSHA requirements. <br /> 7-08.3(1)C Bedding the Pipe <br /> Delete the second and third paragraphs in 7-08.3(1)C and substitute the following: , <br /> Provide pipe zone bedding in accordance with COE Standard Drawing 614 and <br /> 615. Place pipe zone bedding in looselayers and compact in accordance with <br /> COE Standard Drawing 620. Place bedding in lifts of not more than six inches <br /> thick to the height shown in COE Standard Drawing 615. Spread and compact <br /> bedding to provide uniform support pipe along pipe barrel. After placing the <br /> pipe carefully work bedding material under pipe haunches. Continue placing , <br /> pipe zone bedding in accordance with maximum six inch lifts and compact in <br /> accordance with COE Standard Drawing 620. <br /> If the Engineer determines the material existing in the trench bottom is <br /> satisfactory for bedding the pipe, then the bedding material specified in the <br /> COE Standard Drawing 615 is not required, provided the existing material is <br /> loosened, regraded, and compacted to form a dense, unyielding base. I <br /> Supplement 7-08.3(1) by adding the following: <br /> 7-08.3(1)D Trench Dewatering <br /> (******) <br /> This section specifies the definition, responsibilities and execution for dewatering <br /> associated with trench excavation for pipes, manholes, catch basins, cleanouts, <br /> side sewers and other buried utility work. Implement trench dewatering measures <br /> where necessary or directed by the Engineer. Implementation shall include, but not <br /> Watermain Replacement"U" Division 7—STORM, SEWER,WATER October 1, 2019 <br /> WO No.—UP3698 SP—173 <br />