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INDIAN RIVER COUNTY, FLORIDA CONSENT MEMORANDUM TO: Joseph A. Baird, County Administrator THROUGH: Christopher R. Mora, P.E., Public Works Director ( -" Christopher J. Kafer,Jr., P.E., County Engine- AP/ FROM: Richard B. Szpyrka, P.E., Project Engineer 4;;„ SUBJECT: Amendment #7 to the Civil Engineering and Land Surveying Agreement for Intersection Improvements at SR-60 and 43rd Avenue and the Widening of 43rd Avenue from 18th Street to 26th Street with Arcadis US, Inc. IRC Project No. 0853 DATE: April 23, 2015 DESCRIPTION AND CONDITIONS Arcadis US, Inc. (fka Arcadis, G&M) is under contact with Indian River County to provide Civil Engineering and Land Surveying Services for improvements to the SR-60/43rd Avenue Intersection and the widening of 43rd Avenue from 18th Street to 26th Street. Attached Amendment No. 7 includes the following: • The project was designed at the same time as the widening of 43rd Avenue from 18th Street south to 8th Street, designed by Carter Associates, Inc. Both designs assumed that construction would happen concurrently,and therefore design of a transition from the new four lane configuration to the existing two lane configuration was not included in either plan. It has been determined that the roadway widening south of 18th street (the Carter Associates, Inc. design)will not be constructed until later and plan revisions are needed to provide for a transition from the new four lane section to the existing two lane section. The roadway/drainage plans and profile sheets will be revised to show required improvements. • In addition,the two projects designed by Arcadis US, Inc.&Carter Associates, Inc.were coordinated to incorporate a portion of the stormwater treatment for the Arcadis US, Inc. roadway into the Carter Associates, Inc.design for stormwater treatment. It has been determined that the roadway widening and drainage system south of 18th street (the Carter Associates, Inc. design)will not be constructed until later.Therefore, revisions to the Arcadis US, Inc.design are necessary to provide for a drainage system to accommodate the portion of the Arcadis US,Inc.project that was originally directed south into the Carter Associates, Inc. project.The design will consist of inlets and pipes to convey runoff from 43rd Avenue to a new stormwater drainage pond. Hydraulic calculation will be performed to size the pipe system and the stormwater drainage pond.The roadway/drainage plans and profile sheets will be revised to show required improvements. • The project design will be updated to FDOT 2015 design standards. The total negotiated lump sum for Amendment No.7 is$93,691.61.This amount added to the current contract amount of$1,008,786.05 results in a new contract amount of$1,102,477.66. F:\Public Works\ENGINEERING DIVISION PROJECTS\0853-43rd AVE 18th ST to 26th ST(Arcadis)\Admim\agenda items\Arcadis Proposal 115 042215\0853 BCC Agenda Memo for Arcadis Amendment#7-0423I5.doc