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i3 <br />SUPPLEMENTAL AGREEMENT NO. 4 <br />To <br />PROFESSIONAL SERVICES AGREEMENT <br />This agreement entered into this day of 2008, by and between the City of <br />Everett, a municipal corporation under the laws of the State of Washington (City) and <br />MWH Americas, Inc. (Contractor). <br />Witneseth: <br />Whereas the City and Contractor entered into an agreement April 17`h, 2008, entitled <br />"Professional Services Agreement" (Agreement) between the City of Everett and MWH <br />Americas, Inc. to provide construction management and engineering services for <br />Replacement of Water Transmission Lines 2&3 — Phase 6, amended the agreement by <br />Supplemental Agreement No 1 to provide engineering services for Replacement of <br />Water Transmission Lines 2&3 - Phase 7, amended the agreement by Supplemental <br />Agreement No 2 to provide engineering services for alternative design concepts study <br />and development of the transmission line replacement project, and amended the <br />agreement by Supplemental Agreement No 3 to provide additional engineering services <br />for design of Phase 6 utilizing both pile supported elevated pipeline and HDD <br />construction methodologies. <br />Whereas the City and Contractor desire to supplement the Agreement for the purpose of <br />providing construction management and engineering services during construction for the <br />Replacement of Water Transmission Lines 2&3 - Phase 6. Now therefore, the City and <br />Contractor do mutually agree as follows: <br />All provisions in the Agreement shall remain in effect except as expressly modified by <br />this supplement. The changes to the Agreement are described as follows: <br />Amend the previous Exhibit A, Scope of Work, by adding: "Exhibit A-4 Scope of Work, <br />Construction Management Services for Replacement of Water Transmission Lines 2 and <br />3 - Phase 6 Project. <br />Amend the previous Exhibit B, Compensation, by adding "Exhibit B-4" which includes the <br />updated 2008 Rate Schedule and an estimated Project Cost Summary by task for the <br />additional Construction Management Services. <br />Modify Paragraph 3. Time of Beginning and Completion of Performance, by deleting the <br />existing sentence and replacing with the following sentence: <br />"This Agreement shall commence as of the date of execution of this Agreement <br />and shall be completed by December 31, 2010." This amounts to an extension of <br />twenty four months. <br />Page I of 2 <br />