Reece Construction Company Inc 4/24/2018

CITY OF EVERETT SPECIAL PROVISIONS above the top of the pipe in accordance with COE Standard Drawing No. 614. Standard excavating equipment shall be adjusted so as to excavate the narrowest trench possible. 7-09.3(7)A Dewatering of Trench Supplement 7-09.3(7)A by adding the following: Furnish, install, and operate necessary machinery, appliances, and equipment to keep excavations free from water during construction. ' Trench dewatering shall be included with the Work with no direct compensation made. 7-09.3(8) Removal and Replacement of Unsuitable Materials Delete all three paragraphs of 7-09.3(8) and substitute the following: Remove Engineer classified unsuitable material at the trench bottom and replace with "Foundation Material Class A or B", or other Engineer approved imported or native material. Replace, at Contractor's expense, unauthorized over-excavation with Gravel Borrow. Compact Gravel Borrow to minimum 90-percent maximum density. 17-09.3(9) Bedding the Pipe Revise the first paragraph in 7-09.3(9) to read as follows: Place sand backfill for pipe zone bedding to the depths shown in COE Standard Drawing No. 615. Compact sand backfill for pipe zone bedding around the pipe to 90-percent of maximum density by approved hand-held tools, so as to provide firm and uniform support for the full length of the pipe, valves, and fittings. Determine ' maximum in place density using nuclear method (ASTM 2922-17). Determine laboratory maximum dry density and optimum moisture content using the Modified Proctor Method in accordance with ASTM D-1557. Take care to prevent damage to the pipe and its protective coating. 7-09.3(10) Backfilling Trenches Revise the last paragraph in 7-09.3(10) to read as follows: ' Place a minimum 12-inch sand cushion between the water main and existing pipelines or other conduits when encountered during construction. Supplement 7-09.3(10) by adding the following: Backfill trenches in accordance with COE Standard Drawings No. 614, 615 and 620. Unless Engineer directs otherwise, provide Controlled Density Fill for fill above the pipe zone for water main construction that is perpendicular to the travel lane in paved street sections. The Engineer may authorize the use of Gravel Borrow or suitable native material ' in non-paved areas. 7-09.3(12) General Pipe Installation Supplement 7-09.3(12) by adding the following: ' Provide minimum two inch red wide locator tape with wording "Earthquake Resistant Pipeline Below" between 12 and 18 inches directly above the Earthquake System piping. ' 7-09.3(13) Handling of Pipe Supplement 7-09.3(13) by adding the following: Supply water main pipe having ends plugged by manufacturer immediately after manufacturing to eliminate debris entrance into the pipe during shipping and storage. Leave plugs in place until installing pipe in trench. Failure to supply the Water Main Replacement S Division 7—STORM, SEWER,WATER January 29, 2018 WO No.—UP3664 SP—147