Exhibit A
NASHUA 16314 — East Hollis & Bridge Street Intersection Improvement Project
Scope of Work and Task Descriptions
Amendment 1
September 30, 2021
developed based on pricing information gathered by MJ or provided by NHDOT cost
summaries. The estimate, as with all estimates, should not be construed as an actual price for
construction, but merely the engineer’s opinion as to the probable cost of construction.
A description of the existing and proposed closed drainage systems will be developed along
with calculations showing the existing and proposed peak discharge rates within the project
area. It is assumed that the closed drainage system will discharge into the City’s separated
drain system. Stormwater treatment measures will be developed and sized to meet the
requirements of the City’s Stormwater Management Ordinances to the maximum extent
practical.
Traffic timing calculations, including software files, will also be submitted for the proposed
alternative to support the proposed timing charts on the traffic signal plans. These calculations
will be for the anticipated opening year of 2021.
Guardrail and superelevation calculations will also be developed. The calculations described
above will be included in a Design Report.
The Preliminary Plans will be submitted to the City and NHDOT for review.
Prior to submitting Preliminary Plans to NHDOT for review, MJ will complete a Traffic Control
Meeting Request Memo and present the project at one Traffic Control Committee meeting with
one MJ staff member attending.
Phase 2B — Geotechnical Investigations
MJ will work with Sanborn, Head & Associates (SHA) to develop and monitor a subsurface
investigation program, with primary emphasis on determining if existing soils contain asbestos,
determining proposed traffic signal foundations, and providing pavement design
recommendations. A geotechnical report will be prepared to summarize the results of the
investigation and provide pertinent information required for the project. A more detailed scope
of work for SHA is attached.
Phase 2C — Environmental Documentation
The deliverable for this task is an environmental study that satisfies the requirements of the
National Environmental Policy Act (NEPA), specifically a Categorical Exclusion. This is required
before the project can move forward to final design and state and federal permitting processes.
Impact Assessment and Mitigation — Impacts to the following existing resources will be identified
for the preferred alternative.
e Air Quality — The project is in a carbon monoxide (CO) maintenance area and is not
considered a “Regionally Significant Project” (per 40 CFR 93.101 and the Statewide
Transportation Improvement Program); therefore, a regional conformity determination is
not necessary. However, because the proposed intersection improvements will involve
new traffic signals, a quantitative microscale analysis for CO and PM will be required to
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