Laserfiche WebLink
Exhibit A- Supplement 2 <br /> Detailed Additional Scope of Services <br /> Brush College Road at Norfolk Southern Railroad and Faries Parkway <br /> Phase II Engineering Services <br /> Supplement 2 <br /> By AECOM Technical Services, Inc.(AECOM) <br /> For City of Decatur <br /> May 9,2023 <br /> General <br /> This document serves as the scope of additional work for the preparation of updates to the Phase II <br /> Engineering Services for an overpass carrying Brush College Road over the Norfolk Southern Railroad <br /> (NSRR)and Faries Parkway in Decatur, Illinois.This is the basis for the supplemental agreement number <br /> two with the City of Decatur, Illinois. <br /> Project Understanding and Additional Scope of Services <br /> It is our understanding that a Phase I Combined Design Report Section 09-00933-00-BR was prepared dated <br /> March 2015 for Brush College Roadway from just South of Williams Street to just north of Faries Parkway <br /> including two overpasses over the NSRR. The project was broken into three constructible segments. Segment <br /> Three included an overpass over Faries Parkway and NSRR at the intersection of Faries Parkway. Funding <br /> for this third segment was obtained to complete final design and construction. Railroad coordination, utility <br /> conflicts, two changes to the letting date, and an extended schedule led to additional scope of service items, <br /> which are further described below. <br /> Railroad Coordination and Updates <br /> Roadway Design <br /> Develop horizontal and vertical geometry for the design of the Illinois Central Railroad(ICRR)Maintenance <br /> Road for the July 2021 letting.Revise horizontal and vertical geometry for the design of the ICRR <br /> Maintenance Road,to accommodate the placement of the proposed Ameren l OD pole,for the January 2022 <br /> letting. <br /> Prepare Roadway Plans <br /> 1) Prepare Existing Typical Section for ICRR Maintenance Road reconstruction design. <br /> 2) Prepare Proposed Typical Section for ICRR Maintenance Road reconstruction design. Update <br /> proposed typical section for the ICRR maintenance road revised design to accommodate Ameren <br /> pole IOD. <br /> 3) Prepare detail sheet for the ICRR maintenance road. Update the detail sheet for the ICRR <br /> maintenance road revised design to accommodate Ameren pole l OD. <br /> 4) Modify design and sheets to the location of the jacking and bore pits under the ICRR and NSRR <br /> tracks resulting from the permit reviews by the railroads. <br /> Construction Phasing and Traffic Control <br /> Following the preparation of the January 2021 PS&E,the traffic control will be revised to accommodate <br /> phasing changes related to the revisions to the railroad jacking and boring pit locations. <br /> Structural Design <br /> The retaining wall W006 design will be revised to reflect the revised location of a proposed light pole to <br /> maintain the required distance from the proposed Ameren electrical line. <br /> 1 Supplement 2 05/09/2023 <br />