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INTERSECTION IMPROVEMENTS AT CR-510 AND US HIGHWAY 1 AMENDMENT NO. 3 TO THE PROFESSIONAL CIVIL ENGINEERING GEOTECHNICAL ENGINEERING & LAND SURVEYING SERVICES AGREEMENT BETWEEN McMAHON ASSOCIATES, INC. & INDIAN RIVER COUNTY, FLORIDA This is an amendment to the existing Professional Civil Engineering, Geotechnical Engineering and Land Surveying Services Agreement (AGREEMENT) dated May 17, 2005, between McMahon Associates, Inc. (ENGINEER) and Indian River County (COUNTY). This amendment addresses changes in "Section I — Project Limits and Description', "Section III — Scope of Services", " Section IV — Time for Completion," and "Section V — Compensation," of this AGREEMENT. "SECTION I - PROJECT LIMITS AND DESCRIPTION" is being modified to incorporate the following: Consultant services are required for the preparation of construction plans and permit applications for the construction of a 16-inch diameter reuse water main on CR-510, from just east of 61 ' Drive to 58`h Avenue and south on 58th Avenue; and for the preparation of property and topography surveys required for project drainage pond sites, along the project corridor, as follows: The plans will detail the construction of the reuse water main improvements along CR-510 and along 58" Avenue, as follows: a) Design the horizontal and vertical location of approximately 2,398 LF of 16-inch diameter reclaimed water main from Station 281 +26.74 (starting station on plans) and ending at Station 305+24.60 (intersection of 58" Ave.) along CR-510 (Wabasso Road). b) Design the horizontal and vertical location of approximately 1 ,700 LF of 12-inch diameter reclaimed water main from Station 204+40 and ending at Station 221 +00 (intersection of CR-510) along 58" Ave. (Kings Highway). c) Design sub-outs on both sides of the roadway (CR-510 : 8, 132 LF; 58" Ave: 1 ,660) LF for the following utilities: i. 8-inch stub-outs for the newly proposed 16-inch and 12-inch reclaimed water mains. ii. 8-inch stub-outs for existing water mains. iii. 6-inch stub-outs for existing sanitary sewer force mains. d) Locate existing subsurface utilities at conflict points with proposed storm sewer facilities, proposed signalization mast arms, proposed reclaimed water main and proposed stub-outs for reclaimed water, potable water and sanitary sewer force main.