Title
Resolution to Approve Amendment No. 4 to the Professional Services Agreement with Hubbell, Roth & Clark, Inc. for the Headworks Improvement Project at the Water Resource Recovery Facility, RFP No. 19-12 ($230,000.00 Amendment; $1,899,875.53 Total Contract)
Memorandum
Your approval is requested for Amendment No. 4 to the Professional Services Agreement with Hubbell, Roth & Clark, Inc. (HRC) in the amount of $230,000.00 for professional engineering services during construction of the Headworks Improvements Project at the City's Water Resource Recovery Facility (WRRF).
The WRRF headworks systems provide initial treatment to remove debris (screenings) and grit from the water as the first stage of treatment, which prevents damage to downstream equipment and systems. The existing headworks consists of three mechanical bar screens, three screw compactors and two grit removal systems including pumps, swirl separator and grit washer. The bar screens were installed in 1989 and in 2000 and require frequent repair and rebuilding. The grit system was also installed in 2000 and has required pump replacement and rebuilding of the swirl concentrators and washers over time. The cost and frequency for maintenance of these systems have increased and parts for the screening systems are no longer available and must be custom fabricated. These systems are nearing the end of their useful life and are in need of replacement to ensure effective screenings and grit removal.
On December 16, 2019, City Council approved a Professional Services Agreement with HRC in the amount of $477,420.53 to design the Headworks Improvements Project as specified in RFP No. 19-12 (Resolution R-19-564). Subsequently, an odor study in the area of the WRRF was performed by HDR Michigan, Inc. to address ongoing nuisance odor complaints from WRRF neighbors. As a result of this study, the design of an odor control system was added to HRC's contract via Amendment No.1. On May 3, 2021, Council ap...
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