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Exhibit A-Supplement 1 <br /> Drainage Modeling Analysis and Study-Proposed <br /> During preparation of the Drainage Memorandum it was determined that the existing storm sewer system <br /> along East Harrison east leg is undersized. This section of storm sewer was not within the current project <br /> limits. It was determined that an update to this section of storm sewer would be beneficial to the project and <br /> to include this work in the project. WHKS has been assigned the drainage design and memorandum work <br /> and will add this section of storm sewer. Finalize drainage calculations for new section along East Harrison. <br /> Additional cost by WHKS are presented for Drainage Design work_ <br /> Utility Coordination(only item IOf, 1 Ih,and 13c from original scope shown here for additional scone <br /> discussion <br /> 10. Coordination with Norfolk Southern <br /> f. Prepare and submit bore and jack application with fee and plans to Norfolk Southern <br /> (nspipeandwire.com). It is assumed the City will enter into the permanent agreements and pay <br /> the required fees when the applications are submitted. NS has increased the permit process <br /> requirements. It now requires additional items be submitted with the application. Additional <br /> hours are presented for NS RR permit preparation work.Additional Geotechnical field and <br /> report work not presented at this time until further discussions with City and Geotechnical <br /> subconsultant. <br /> 11. Coordination with(IC RR) <br /> h. Prepare and submit bore and jack application with fee and plans to(IC RR). It is assumed the <br /> City will enter into the permanent agreements and pay the required fees when the applications <br /> are submitted.IC RR(CN)has increased the permit process requirements. It now requires <br /> additional items be submitted with the application. Additional hours are presented for IC RR <br /> permit preparation work.Additional Geotechnical field and report work not presented at this <br /> time until further discussions with City and Geotechnical subconsultant. <br /> 13. Coordination with City of Decatur <br /> c. Prepare Water Line Relocation Plans and IEPA Permits. Additional water main relocation not <br /> identified in Phase I was determined through coordination with the structural group at the center <br /> pier location on Faries Parkway. Additional hours are presented for Phase II watermain design <br /> and relocation plan and quantity work. <br /> Assumptions made for Water and Sanitary Sewer Relocation: (only items 1, 7, 8,and 9 from original scope <br /> shown here for additional scope discussion) <br /> 1. The original hours and fee estimate proposal was based on the relocation of approximately 2,000 feet <br /> each of 24"and 16"water mains(4,000 feet total)and approximately 1,000 LF of sanitary sewer. <br /> These two lines were the ones running north south on Brush College Road. The east west line on <br /> Faries Parkway was not identified as in conflict with the bridge pier in Phase I document used for <br /> original scope and manhour preparation. See Utility Coordination City Decatur above. This <br /> relocation will involve a new utility crossing under the IC RR as the existing crossing location <br /> cannot be used. See Utility Coordination IC RR above. <br /> 7. Any soil borings or Geotech reports required for the water main design and/or the railroads involved <br /> are not included at this time in the original proposal. A current download of the Railroad Utility <br /> Crossing Permit now requires a Geotechnical Report(PGR). See Utility Coordination NS and IC <br /> RR above.Additional Geotechnical field and report work not presented at this time until further <br /> discussions with City and Geotechnical subconsultant. <br /> 8. The original scope proposal does not include providing any of the possible permitting requirements <br /> by railroads such as dewatering plan/vibration monitoring/shoring plan/settlement monitoring, etc.A <br /> current download of the Railroad Utility Crossing Permit now requires a Dewatering Plan,a <br /> Vibration Monitoring Plan,and a Settlement Monitoring Plan. See Utility Coordination NS and IC <br /> RR above. <br /> Additional Scope 08-21-20 ExA SI-6 <br />