To:
From:
Re:
B. Motion:
Attachment:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: April 23, 2020
David L. Boucher, Superintendent
Wastewater Department
Primary Tank Upgrade Project - CO4
To approve Change Order #4 to the contract with Methuen Construction in an amount of
349,335 for the construction of upgrades to the primary tanks at the Wastewater
Treatment Facility. Funding will be through Department: 169 Wastewater; Fund: WERF
and SRF Loan; Activity: Primary Upgrade Project.
Change Order #4
The Nashua Wastewater Treatment Facility is undergoing an upgrade of its primary
tanks. Methuen Construction was awarded the contract in the amount of $3,629,340.
Change order 1 was for using the preferred chain and flight manufacturer in the amount
of $20,000 to bring the contract amount to $3,649,340. Change order 2 was for an
increase in the Davis Bacon wage rates for electricians in the New Year in the amount of
$4,978.31. Change order 3 was for changing the primary gallery exhaust fan to a 2 starter
fan in the amount of $3,483.78. The new contract amount is currently $3,657,802.09.
This change order is for 3 items: 1) additional work with coating the existing weirs in the
thickened primary sludge tanks. The existing weirs are rusting and should be cleaned and
coated with new epoxy paint prior to installing new fiber glass weirs. 2) Some additional
costs incurred by the Contractor’s earth sub when it was decided to move the electrical
building to the north to keep away from an underground electric duct bank. 3) Upgrade
the PLC processor in the new electric building. The total of these items comes to
$49,335. The new contract amount following this change order comes to $3,727,146.09,
