2400 33RD ST CONTRACT AGREEMENT 2016-01-01 MF Import

ATTACHMENT A TO SECTION 01900 REVISI��NS TO THE STANDQRD PLANS AND SPECIFICATIONS prevent float�ng of the pipe. Trench water or other deleterio�s materials shall not be allowed to enter ihe pipe at any time. It shall be the Coniractor's responsibility to iurnish, install, and operate all necessary machinery, appliances, and equipment to keep excavations free (rom water during consiruction. Trenches shall be constructec: to the depths, widths, and grades shown in the Plans and in ihe City of Everett Standard Drax•ings. Removal and Replacement of Unsuitable Material Section 7-09.3(8) is supplemented with ihe iu!!owing: Replacement material tor material at the trench bottom ihat has been classified by the Resident Engineer as being unsuitable material, and ordered removed, shall be (ound�tion r.aterial Class A or other imported or native mater�al as deemed appropriate by the Resident Engineer. Any overexcevation not speciticaily authorized by ihe Resident Engineer shall be replaced by the Contractor with gravel h:••,,w, and compac:ed as specified below under Backfilling Trenches, at no additional expense to Sound Transit. Bedding the Pipe Section 7-09.3(9) is supplemented with ihe tollawing: Rigid Pipe Unless otherwise specitied on the drawing or directed by the Resident E�i�ineer, pipe zone material for rigid pipe shall be crushed surfacing base course per Section 9-03.9(3). The pipe zone material shall be placed to a depih of at least 12 inches over the top oi the pipe and 6 inches under the pipe. The pipe zone ma:erial shail be rammed and tamped arcund and under the pipe by the use ot shovels or other approved hand-held tools, so as to provide tirm and uniform support along the fuil length o( the pipe, valves and !';tings. Care shall be taken to prevent any damage to the pipe or its protective coating. Backiiliing Trenches Section 7-�9.3(10) is supplemented with the following: Meet the requiremenis ot City of Everett Standard Drawings 316 and 610, 611, 615 and Section 3-9� of ihe City of Everett Design and Consiruction Standards and Specifications. Unless otherw ;e directed by the Resident Engineer, controlled density till shall be used tor fill above the pip• zone tor water mains in all paved street sections. Controlled dPnsity till shall conform to the requiremen•s o( Section 2-09.3!1)E oi ihe Standard Speci(icatior,,,. 'ihe Re�ident Engineer may authorize ihe use ot gravel borrow or suitable native material in non-paved areas. Compaction ot irench materiais shail be accomplished using machine operated mechanical compaction or hand operated mechanical compaction. Generai Pipe Installation Ser,tion 7-09.3(12) is supplemented with the (ollowing: Meet ihe Requirements in ihe City of Everetl Design and Construction Standards and � Speci(ications. - �apilal Projects Commuter Rail Attachment A to Section 01900 - 20 IFB No. RTA/CP 21-06 � Everett Stat�on Phase 2P.EVISIONS TO THE STANDARD PLANS AND SPECIFICATIONSAddendum No.4