Exhibit A
NASHUA 16314 — East Hollis & Bridge Street Intersection Improvement Project
Scope of Work and Task Descriptions
Amendment 1
September 30, 2021
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Grading Plans - Plans will be completed at a scale of 1” = 20’. These sheets will include
proposed spot elevations.
Signing and Striping Plans — Plans will be developed at a scale of 1” = 20’. The General
Plans will be used as a base plan with many features removed in order to simplify the
presentation and will provide the location and type of traffic signs and pavement
markings.
Traffic Signal Plans — Traffic signal plans will be developed at 1” = 20’ scale. These
plans will provide location and equipment types. It is assumed that all equipment will be
as per City and NHDOT standard specifications and drawings. It is anticipated that a
total of three timing plans will be prepared for the AM, PM and weekend midday time
periods. The timing plans will be coordinated with the City’s existing Traffic
Management System called TACTICS. Three traffic signal plans will be developed for
the traffic signal on East Hollis Street, the traffic signal on Bridge Street, and the
Pedestrian Hybrid Beacon on East Hollis Street. It is assumed that the traffic signals will
be coordinated and utilize smart technology, such as queue detection, to help manage
vehicle queuing during peak travel times.
Streetscape Plans — Plans will be developed at a scale of 1” = 20°. The plans will
include the placement and species of plantings, street lighting, and street furniture that is
proposed for the project.
Retaining Wall Plans — A retaining wall is required between Bridge Street and Riverfront
Landing between the driveway to Riverfront Landing and the bridge over the Merrimack
River. Plans will be developed at a scale of 1” = 20’. The plans will include the elevation
view of the wall, horizontal geometry, and typical sections. It is assumed that the wall
will be constructed with modular blocks and will be offset from the back of sidewalk at
least 6 feet so that a moment slab is not needed at the top of the wall.
Traffic Control Plans — Traffic control drawings will be developed at a scale of 1” = 50’.
These plans will indicate the construction phases and location of traffic during those
phases. Temporary signal plans will also be included. The plans will also incorporate
NHDOT standard traffic control details as well as details available through the Manual on
Uniform Traffic Control Devices (MUTCD). It is not the intent of these plans to illustrate
the placement of all traffic control devices, but standard distances between devices and
potential sign placement will be included.
Cross Sections — Cross sections will be developed at a spacing of every 50’ and at all
driveways, walkways, and side street locations (if not located near a 50’ section) at a
scale of 1” = 10’. The sections will indicate items such as existing curbs, buildings, and
other items that are physical constraints. Existing utility poles and underground utilities
will also be shown. The cross sections will be developed similar to NHDOT standards
but will not include all the detail normally seen within a NHDOT plan set.
An engineer’s estimate of probable cost will be developed. Roadway, landscaping, utility, right-
of-way, and construction engineering costs will be presented. The engineer’s estimate will be
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