Project Approach
Determining the recommended route and configuration of the improved system is the most
important element in this evaluation. For this reason, our study will focus on consideration of
physical constraints and the determination of a recommended pipe layout. We consider sizing of
the pipes as secondary in importance to the determination of a preferred layout. We anticipate
consideration of the following alternatives:
e A new stormwater pipeline may be routed in Factory Street with access to a river outfall
through a 20-loot alley between Factory Strect and Water Street.
e Alternatively, the existing 48-inch combined sewer pipe could be used for drainage with
a connection made to the existing 48-inch outfall. A new sewer main would be needed.
This pipeline might be routed in Factory Street through the 20-foot alley and connect into
the riverside interceptor.
e Alternatives which do not involve new pipe in Factory Street would require a new
pipeline in the area of the Water Street bridge abutment. There are significant horizontal
and vertical constraints which we will evaluate in this area.
Following review of routing alternatives, HIS1 will make recommendations to the City. With City
review and input, HSI will proceed with preliminary sizing of pipelines to complete this initial
evaluation.
Our work on this assignment, as well as possible future assignments, will be performed in
accordance with the terms and conditions attached. The work will be billed at the hourly rates
listed in the attached Fee Schedule. Total billings will not exceed $75.000 without advance
written authorization.
Thank you for the opportunity to provide professional services to the City of Nashua. Please
contact me if you have any questions.
*, Vancor, PLE
Vire President/Principal Engincer
Sinc
APPROVED BY:
Mayor Donchess, City of Nashua
