To:
From:
Re:
B. Metion:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: August 22, 2019
eff Lafleur, Superintendent
Solid Waste Department
Change Order #1 to contract with Charter Contracting Company, LLC.
To approve Change Order #1 to the contract with Charter Contracting Company,
LLC of Boston, MA in an amount not to exceed $175,000 for the construction of
the Phase IIE Landfill. Funding will be through Department: 168 Solid Waste;
Fund: Bond; Activity: Phase [T Landfill,
The change order above is a culmination of changes and delays directly related to
the results of a DES required groundwater separation study that altered the base
grades of the landfill from what was originally designed by Sanborn Head and
Associaies. In addition to historical groundwater elevation data collected at the
site over many years, DES required the collection of monthly groundwater levels
between November 2018 and June 2019 to confirm the seasonal high water table.
DES then requested an additional round of groundwater measurements in July
2019. Heavy rains in the fall of 2018 and spring of 2019 resulted in higher than
expected groundwater levels, which necessitated the change in the landfill base
grades. DES then required an additional permit modification application to be
submitted for approval of the new base grades. The additional groundwater
measurements, and permit application submittal and approval resulted in a 33 day
delay to the project and contractor. The change in the base grades also resulted in
additional labor and material quantities. Final costs are not yet available as they
are dependent on final survey results; however, we do not anticipate they will
exceed $175,000,
The requested change order of not to exceed $175,000 is recommended by the
Superintendent of Solid Waste.
