Finance Committee - Agenda - 12/26/2017 - P12
To:
From:
Re:
D. Motion:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: December 14, 2017
Stephen Dookran, P.E., City Engineer
Engineering Department
Canal Street Bridge over Nashua River
Subsurface Exploration
To award the contract for bridge engineering services of the Canal Street Bridge
subsurface investigation to CLD/Fuss & O’Neil of Manchester, NH in
the amount of $24,628. Funding will be through Department: 161 Streets; Fund:
Capital; Activity: Bridge Rehabilitation
The Canal Street bridge over Nashua River is part of a significant east-west
arterial road seeing approximately 30,000 vehicles per day. Like all municipally
owned bridges, it receives routine inspections by the NHDOT. The bridge, which is
about 90 years old, is currently seeing substantial deterioration. While the deck and
superstructure both have a rating of 6 (satisfactory), the substructure is suffering with a
rating of 4 (poor). This last rating places the bridge on the red list. This is in great part
due to a substantial amount of spalling concrete on the east abutment.
The scope of work for this package includes performing 3 borings, perform laboratory
testing on recovered samples and produce an engineering report presenting the results of
the boring sampling and the implications as far as existing soil permeability and
recommended options for repair treatments. This report will be the basis for selection
of the repair extent and method, which will be a separate package for engineering
services.
At this time, timely attention is warranted for the repairs of this bridge. For this reason,
Engineering seeks to procure these services by way of sole sourcing with CLD/Fuss &
O’Neil. This is the consultant that we have used in our past two bridge projects, the
Manchester Street Bridge and the Pennichuck School bridge. CLD has also volunteered
their services to perform investigations and reviews of this red listed bridge while
working in the City while working here on the aforementioned prior bridge projects. As
such, CLD is current on our needs and expectations on this bridge repair project.
Currently, the plan is to have this scope of work completed by the very early spring, the
follow-on comprehensive design mentioned above completed by early summer and
construction repairs completed before the winter of 2018.