Title
Resolution to Approve a Contract with Hubbell, Roth & Clark, Inc. for Design of Pump Replacement at the Wastewater Treatment Plant ($122,595.00)
Memorandum
Your approval is requested to award a Professional Services Agreement in the amount of $122,595.00 to Hubbell, Roth & Clark, Inc. (HRC) for professional engineering services to design the replacement of Secondary Effluent Pumps at the City’s Wastewater Treatment Plant (WWTP).
The WWTP has six 150 horsepower Secondary Effluent Pumps. Typically, two pumps are used to continuously pump secondary effluent into sand filters as part of the treatment process. Occasionally, when the Huron River is at high levels, the pumps are used to pump secondary effluent simultaneously to the sand filters and the river. Without these pumps in service, the WWTP runs the risk of discharging partially treated sewage or flooding the treatment plant.
Several months ago, one of the Secondary Effluent Pumps failed catastrophically. HRC was contracted to do a root cause analysis of the pump failure because of their familiarity with the pump system at the WWTP and the nature of the malfunction. HRC was also asked to evaluate the hydraulic conditions in the secondary effluent pumping system. Once the evaluation and analyses were complete, HRC made recommendations on alternatives for repairing or replacing the pumps which have been in use for over 35 years.
Plant staff reviewed the engineers’ recommendations and decided that the best alternative for the City is to replace all six pumps. An attempt to include these replacements into the ongoing Facilities Renovation Project (FRP) at the WWTP was rejected by the MDEQ because they were not part of the project plan approved by MDEQ. Improvements to the Tertiary Filter Building, which houses the Secondary Effluent Pumps, were not included in the FRP because these improvements were not anticipated to be necessary for another 10-15 years during the development of the Facilities Mas...
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