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 for the SGR soil borings. Additional cost are presented for this field work and report preparation work by SKS. Task 00200 Phase I Update—VE CR ABC Phase I update Roadway and Structures Roadway Geometry The original roadway geometry update was to include horizontal geometry tie in between the existing and proposed improvements of Brush College Road near the existing Norfolk Southern Railyard overpass. The previous south limit on BCR was station 50+00. This included profile modifications to tie into the existing underpass profile grade at approximately this station 50+00. During current design the limits had to be extended to the underpass about 340 feet. The new project limit south is station 46+59.44 and work will require tying into the existing RR viaduct. The IDS modifications in our current scope of work only included minor rework for the south tie in up to station 50+00 to be completed and submitted for D7 review. Through the Optimize Current Design task a shift in alignment was determined to be most beneficial for the project in saving construction cost on the bridge over the NS RR where a four-span structure was reduced to a two-span structure. This required more extensive rework of the IDS for IDOT review. During the review IDOT had additional comments on other legs of the roadway network which were previously approved in the phase I IDS process. This required additional IDS rework to gain approval. Multiple typical sections had to be developed for the sideroads to stay within existing ROW. Open ditch and curb and gutter sections were developed and reviewed to determine appropriate use by locations on the sideroads. With the extension south and added structural items(Cut Wall,L-Wall,and Structural Barrier)additional roadway support was used for providing wall profiles,typical sections, cross sections for design purposes, and design coordination. After 60%plan estimates were prepared efforts were completed towards cost saving measures on the project including possible elimination of the ICRR track shift. Additional hours are presented for IDS work,Typical section development,Horizontal and Vertical Geometry, Cross Section support and Cost Saving Measures. Revise Type, Size and Location(TSL)Plans Extension of the southern limit of the project required a cut wall TS&L be prepared. Quigg Engineering was assigned this work. The current project scope of work did not include walls other than MSE walls. Quigg Engineering was able to complete this scope change under the current hours assigned to them for TS&L work. No additional hours are presented for QEI TS&L work. WHKS is requesting hours for changes from MSE to Precast Modular Wall for the TS&L drawings and quantities on Wall 003. Additional hours are presented for WHKS TS&L work. Additional Scope 08-21-20 ExA S 1-2