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 9. The original scope proposal does not include any structural hours that may be required for shoring or earth retention systems that may be required for the water main relocation. Structural hours may be required as final location is set,and design started.At this time no additional scope of work or hours are requested. Concerns with Phase I utility relocations layout as shown: The close proximity of railroad tracks in some areas of the proposed preliminary water main relocation alignment is a cause for concern. Preliminary investigation of the requirements of the two railroads involved indicate that temporary and/or permanent shoring may be required to prevent movement of the tracks. As mentioned above in Notes 8 and 9,the proposal does not include hours to address the possible structural design and specialized permitting requirements of the railroads involved. The design of the structural elements required can be done by the Contractor during the permitting and construction approval process between the contractor and the railroad. Through design optimization the watermain has been moved away from the IC RR tracks. As design progresses some temporary shoring may be required for the perpendicular crossings of the IC RR for the watermain and the sanitary sewer. At this time no additional scope of work or hours are requested. CN Railroad Track Realm Railroad track realignment is required for approximately 1000 feet of the CN Railroad just north of Faries Parkway along the west side of Brush College Road. Hours in the original scope of work were for presentation of the Phase I design to the IC RR for their use in realigning the tracks. See new task IC RR Reconstruction PS&E. IC RR Reconstruction PS&E At the request of the IC RR and the City,AECOM will prepare IC RR track realignment design. Some items in the design will be included in the City construction package. While details are being worked out in the City/IC RR Agreement it is our understanding that AECOM is to prepare the realignment design and City Contractor plans to consist of everything up to the sub ballast. The IC RR will utilize the design prepared and bill of materials of outstanding items for ballast and trackwork, signal system warning lights and gates, and crossing surfaces construction with either their own forces or an IC RR Contractor. A warning lights and gates layout will be prepared by AECOM with the Geometry of the roadway for IC RR use with the signaling design department. Additional hours are presented for Phase 11 IC RR Reconstruction design and plan and quantity work. IC RR did not fully commit to design in Phase I and it is also requiring additional coordination to gain approvals. Prepare Roadway Plans(only items 10, 11, 13, 14, 16, 17, 18, 19,20,21,23,29,30,and 31 from original scope shown here for additional scope discussion) 10. Prepare Removal Plans. Additional coverage at South BCR extension limits. Additional coverage on East Harrison east leg. 11. Prepare Roadway Plan and Profile Sheets.Additional coverage at South BCR extension limits. Additional coverage on East Harrison east leg. Additional Roadway details will need to be developed for the guardrail tie into the existing railing,transitions between the different barriers and walls along south west side, and gutter transitions at the south limits. 13. Prepare Drainage Schedule. Additional coverage at South BCR extension limits. Additional coverage on East Harrison east leg. 14. Prepare Drainage Plan and Profile Sheets.Additional coverage at South BCR extension limits. Additional coverage on East Harrison east leg. 16. Prepare miscellaneous Drainage Details.Additional coverage on East Harrison east leg. Additional Scope 08-21-20 Ex<A SI-7