To:
From:
Re:
B. Motion:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: October 26, 2017
Noelle Osborne, Plant Operations Supervisor
Wastewater Department
Headworks Upgrade Project
To approve Change Order 7 to the Headworks Upgrades contract with T-Buck
Construction, Inc. in the amount of $62,673.11. Funding will be through:
Department: 169 Wastewater; Fund: SRF Loan; Activity: Headworks Upgrades.
Change Order 7 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 $135,332.94 brings the current contract value to $2,983,554.94.
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, plumbing and HVAC
modifications.
This change order is for 6 extra work items: 1) saw cut into concrete walls of the
long channel to allow new rake and screen to fit, 2) during modifications to
ceiling near men’s locker room it was found that there was open gaps above
ceiling from wet well to locker room; TBuck was asked to provide costs to seal
off that gap, 3) a structure beam was in the path of the effluent tube for wash press
no. 2; a fitting had to be ordered and installed to offset the tube, 4) the Wastewater
Facility request a viewing port be installed in the wall between the wash press
room and the garage housing the screenings container, 5) FRP odor control
adjustment of an additional 20 inches, and 6) electrical work necessary to replace
and reconnect several breakers that were incorrectly included as remove, not
replace.
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
$62,673.11. The new value of their contract following this change order will be in
the amount of $3,046,228.05.
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.
