The City of Dublin is requesting proposals to perform detail design of replacing deteriorated retaining walls on a pedestrian tunnel under Memorial Drive. This project is fully funded by the City of Dublin. The Division of Engineering is hereby requesting a proposal from multi-disciplined, professional engineering consulting firms to prepare detailed construction drawings for new retaining walls at the face of the existing tunnel. The majority of the design professionals involved with the project must be located in central Ohio. The City of Dublin has programmed the removal of the existing deteriorated stone facade/slope face at both ends of the pedestrian tunnel located on Memorial Drive southwest of Berkshire Court. Cast-in-place retaining walls are proposed to replace the existing stone facade retaining walls, which will require the existing mitered tunnel pipe ends to be removed and replaced with a standard 108-inch diameter concrete pipe, 8 feet in length - which is not mitered. The face of the retaining walls will be at the end of the standard concrete pipe. The proposed retaining walls will likely be a straight alignment and a minimum of 30 ft. in length. The retaining walls will have manufactured stone applied to exposed surfaces. The new pipe will have a concrete paved invert. The entire tunnel interior, both new and existing pipe, will be surfaced prepared, sealed, and painted on exposed surfaces. The existing timber guardrail on both sides of Memorial Drive will be removed and replaced with steel-back timber guardrail. No temporary construction easements are necessary for this project. Existing right-of-way, existing easements, and the Muirfield Association Walkway Easement areas will be adequate for most of the construction staging and construction of the project. Additional right-of-entry agreements will be secured by the City from adjacent property owners for construction. This project is programmed for design in 2022 and construction in 2023. If you have any questions regarding this RFP, please contact Ken Richardson, PE, PS at (614) 410- 4631 or krichardson@dublin.oh.us. Any other contact with City personnel related to this RFP, prior to the formal selection of the Consultant, is expressly prohibited without the consent of the City's Project Manager. The City of Dublin will use a Selection Committee to review and evaluate the proposals. From this process, the City may select the winning proposal. If a clear decision cannot be made, or if the Selection Committee needs further clarification, the City reserves the right to shortlist the proposals. The shortlisted firms will be contacted to provide additional information to participate in a meeting or interview. The Selection Committee plans to make the final selection by June 9, 2022. Authorization to proceed planned for June 28, 2022. All professional services will be provided on a cost plus fixed fee basis. Hourly rates for staff assigned to the project shall be fully budgeted rates. Fees for additional items, as requested and authorized, will be established separately. Failure to submit fee proposal may cause the City to reject Proposal for this project.
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