City of Nashua, Public Works Division
To: Board of Public Works Meeting Date: December 29, 2016
From: Noelle Osborne, Plant Operations Supervisor
Wastewater Department
Re: Water Booster Station Upgrades — Design Phase Services
EK. Motien: To approve the contract to Woodard & Curran for professional services for a
design phase for the upgrades to the NWTF potable water booster station in an
amount not to exceed $105,600. Funding will be through: Department: 169 -
Wastewater; Fund: SRF Loan; Activity: Water Booster Station.
Atiachments: Woodard Curran Scope of Work and Fee.
Discussion: The purpose of the potable water booster station is to increase the pressure and
flow rate of potable water entering the plant. It was originally installed in 1988
as part of the secondary upgrades project and consists of 2 underground vaults,
one for the water meter and backflow preventer valves and the other consisting
of pumps on a skid. The water system vaults are at a low point in the water
distribution system and are subject to grit accumulation which has caused
issues with the back flow preventer valves closing properly.
The proposed upgrades will house all the pumps in one building above ground
at the same location as the existing water booster station vaults. Having the
booster station above ground should minimalize the issue of grit getting stuck
in the back flow preventer valve and will increase accessibility for inspection.
Woodard and Curran was chosen as the consultant for the study-evaluation
phase based on their qualifications back in July 2016. During the study phase,
water pressures were evaluated, flow test conducted, water use evaluated and
backup needs assessed. A report on their finding was finalized in November
2016 which validated the need for the water booster station upgrade. They
have acquired a good background on the potable plant water system which will
allow for a more efficient design of the upgrades needed during the design
phase.
Woodard and Curran has requested 210 days to completed the final design
following contract award. They have completed numerous water upgrades
projects at wastewater treatment plants and are well qualified for this work.
