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McAT TO� 11 400 1 ON ASSOCIATES, INC. 1^l 2090 Palm Beach Lakes Blvd,Suite 400 l West Palm Beach,FL 33409Mj �— p 561-840.8650 1 f 561-840.8590 mcmahonassociates.com i PRINCIPALS Joseph W.McMahon,P.E. March 18 2016 Joseph J.DeSands,P.E.,PTOE John S.DePalma William T.Steffens Casey A.Moore,P.E. Gary R.McNaughton,P.E.,PTOE VIA E-MAIL ASSOCIATES John J.Mitchell,P.E. Mr.Patrick S.Walther P.E. Christopher Trent Williams,P.E. , R.Trent Ebersole,P.E. Carter Associates,Inc. Matthew M.Kozsuch,P.E. 1708 21st Street Maureen Chlebek,P.E.,PTOE II Vero Beach,Florida 32960 RE: US-1 at 41a1 Street Signal Design Plan—Supplemental Agreement No.2 McMahon Project No.N15067.OP Dear Pat: McMahon Associates,Inc. (McMahon) is pleased to provide this supplemental agreement for the US-1 at 4151 Street Signal Design project, in Vero Beach, Florida. This proposal is for additional services related to traffic signal modification design services at the US-1/41s1 Street intersection.-The-additional - - - services are for the design of a new traffic signal at the adjacent intersection of Old Dixie and 41i1 Street. j The design will require coordination with Vero Beach Power and FEC railroad. i This agreement is based on the assumption that all project baseline geometry, existing and proposed right-of-way, topographic, geotechnical, and sub-surface utility exploration (SUE) information necessary to complete the design,will be provided by Carter Associates,Inc. j I In order to provide the proper design for the traffic signal supports, Carter Associates, Inc. must provide subsurface soil information. Soil borings will be obtained in the field by a Geotechnical Engineer, at all corners of the study intersection. The geotechnical information will be analyzed and the project Geotechnical Engineer will provide a standard report. This information will be utilized for the design of traffic signal mast arm supports. If right-of-way or other project constraints dictate that a 1 proposed mast arm base must be placed within the vicinity of an existing underground utility, then Carter Associates, Inc. will provide the sub-surface utility exploration (soft dig) necessary to identify the utility conflict. If additional right-of-way or easements are required for the proposed signal equipment locations,Carter Associates,Inc.will obtain the necessary agreements. The Scope of Work includes the following tasks: i Corporate Headquarters: Fort Washington,Pennsylvania Serving the East Coast from 13 offices throughout New England,the Mid-Atlantic, and Florida i