R2020-119 Resolution Authorizing City of Decatur Supplement #1 to the Professional Engineering Services Agreement Between the City of Decatur and AECOM for Design Services for the Improvement of Brush College Road over Faries Parkwa

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Exhibit A- Supplement 1 Detailed Additional Scope of Services Brush College Road at Norfolk Southern Railroad and Faries Parkway Phase II Engineering Services By AECOM Technical Services,Inc. For Decatur Illinois August 21,2020 General This document serves as the scope of additional work for the preparation of an update to the Phase I Combined Design Report and Phase II Engineering Services for an overpass carrying Brush College Road over the Norfolk Southern Railroad and Faries Parkway in Decatur,Illinois. This is the basis for the supplemental agreement number one with the City of Decatur, Illinois. The scope of work has been broken down into the following task to match the Prime agreement: Task 00100 Survey and Field Work Task 00200 Phase I Update—VE CR ABC Task 00300 Reports Task 00400 Phase II Design-Plans Special Provisions and Estimates Task 00500 City and Stakeholder Coordination Task 00600 Project Management Task 00700 QA/QC ITR Project Understanding and Additional Scope of Services It is our understanding that a Phase I Combined Design Report Section 09-00933-00-BR was prepared dated March 2015 for Brush College Roadway from just South of Williams Street to just north of Faries Parkway including two overpasses over Norfolk Southern Railroad. The project was broken into three constructible segments. Segment Three included an overpass over Faries Parkway and Norfolk Southern Railroad at the intersection of Faries Parkway. Funding for this third segment was obtained. As segment two,an overpass over the Norfolk Southern Railroad Yard,has yet to be constructed modifications to the Phase I design was required for the third segment to tie into the existing geometry of Brush College Roadway south of Faries Parkway. Coordination meetings and Value Engineering and Constructability Reviews lead to additional agreed upon modifications to the Phase I design. Additional scope of service items were determined through the design process and coordination with the City,D7 and IC RR. These additional scope items are further described below. Roadway Reconstruction Limits It was anticipated that the project limits would extend from station 50+00 just south of Olive Street to station 78+00 just north of Harrison Street. The project limits will now require extension south to the existing NS RR viaduct on Brush College Road(BCR). The new project limit south is station 46+59.44 and work will require tying into the existing RR viaduct as the previous south limit on BCR was station 50+00. Task 00100 Survey and Field Work Geotechnical Soil Borings-field work Railroad Permit Soil Geotechnical Borings and Report(PGR) for Utility Crossing Permits Additional Geotech soil borings and signed reports by the Geotechnical Soil Boring subconsultant are now required under the new RR Utility Crossings Permit applications. Original scope of work did not include any soil borings or Geotech reports that are now required for the water mains,sanitary sewer and storm sewer crossings for the IC RR and NS RR involved. A current download of the Railroad Utility Crossing Permit now shows that a Permit Geotechnical Report(PGR)is required with each application. SKS has been used Additional Scope 08-21-20 ExA S1-1