To:
From:
D. Motion:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: September 28, 2017
Noelle Osborme, Plant Operations Supervisor
Wastewater Department
Headworks Upgrade Project
To approve Change Order 6 to the Headworks Upgrades contract with T-Buck
Construction, Inc. in the amount of $26,759.85. Funding will be through:
Department: 169 Wastewater; Fund: SRF Loan; Activity: Headworks Upgrades.
Change Order 6 Backup
The contract with TBuck for the Headworks Upgrades at the Wastewater
Treatment Facility was originally for $2,848,222.00. Previous change orders in
the amount of $108,573.09 brings the current contract value to $2,956,795.09.
Past change orders included new lockers for the men’s locker room, relocation of
pipes and ducts due to conflicts, changing out electric circuits that were found to
be deficient, addition of several new ceiling mounted heaters and modifications to
influent flow channel to allow new screens to fit.
This change order is for 4 extra work items: 1) provide new dampers for unit
heater 3A, 2) modifications to the C channel in the short channel bar rack floor
penetration support, 3) relocation of water line that will interfere with the
installation of unit heater 3A, and 4) install a new panel view next to the wash
press room to allow operators to reset the bar rack and wash press locally. The
existing dampers were found to be stuck following demolition of the old heating
unit, requiring new dampers to be purchased. Additional modifications are needed
for the C channel in the short channel bar rack floor penetration support. The new
panel view was requested by Plant personnel after the startup of the short channel
screen, allowing staff local controls to the new equipment.
The change order work scope and costs has been reviewed and approved by the
consultant Wright Pierce. The total amount of this change order comes to
$26,759.85. The new value of their contract following this change order will be in
the amount of $2,983,554.94.
This project is an SRF funded project and the City will be seeking a State Aid
Grant (SAG) in the amount of 20% of the costs should such funding become
available.
