Title
Resolution to Approve Amendment No. 1 to the Professional Services Agreement with NTH Consultants, Ltd. to Design the Access Bridge Replacement Project at the Water Resource Recovery Facility, RFP No. 21-17 ($378,800.00 Amendment; $668,972.00 Total Contract)
Memorandum
Your approval is requested for Amendment No. 1 to the Professional Services Agreement with NTH Consultants, Ltd. (NTH) in the amount of $378,800.00 for professional engineering services to complete a site plan and the design of a new access bridge over the Huron River to the City’s Water Resource Recovery Facility (WRRF).
The City’s WRRF is located in Ann Arbor Township and operates 24 hours per day, seven days per week. Access to the WRRF is provided by a roadway leading from Old Dixboro Road to the plant entrance that includes a bridge spanning the Huron River. The WRRF access bridge is approximately 90 years old, and the bi-annual bridge inspection performed in 2024 identified the bridge to be in fair condition and in need of replacement.
The current access road and bridge are located along a 650-foot long and 57-foot wide easement east of Old Dixboro Road. A new bridge must be located on property south of the existing bridge and will require realignment of a portion of the access road. Property along the south side of the access road is privately owned and City staff have begun discussions with the property owner to obtain an easement needed for the construction of the project. In addition, the existing bridge must remain in service while constructing a new bridge as it provides the only access for WRRF staff, delivery of materials and contracted service providers.
On September 7, 2021, Council approved a Professional Services Agreement with NTH in the amount of $290,172.00 to perform a preliminary project study and preliminarily design a replacement access bridge to the WRRF (RFP No. 21-17, Resolution R-21-340).
As part of this preliminary project study, NTH identified alternativ...
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