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ITEM 203.113 - DRIVEWAY EXCAVATION AND REGRADE
A. SCOPE

This work includes removing asphalt and concrete driveway materials to subbase, regrading, and
placing new pavement in kind. This item will only be used on roadways which are being
reclaimed or as directed by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved City of Nashua Standard Specifications for Road
Construction, or the latest approved NHDOT Standard Specifications for Road and Bridge
Construction. The most stringent specification shall apply. Transportation and disposal of the
removed material shall be the responsibility of the Contractor.

This work includes saw cutting and removing asphalt or concrete driveway materials down to
subbase, regrading as directed, and compacting subbase to 95% density. Placement of asphalt
will be done under Item 403.12. When the Engineer directs that concrete shall be used for
driveway pavement, payment shall be made under item 403.12 at the rate of two hundred percent
(200%) of the contract unit price. Limits of work shall be agreed upon with the Engineer.

Minimum thickness of reconstructed driveway asphalt pavement shall be 2.5 inches and shall
match existing thickness for concrete driveways.

Contractor shall use a 1 ton steel drum roller or heavier to achieve required compaction.

C. MEASUREMENT AND PAYMENT

This item will be paid per Square Yard of asphalt placed and compacted in the field. Payment for
this item shall be at the contract unit price per Square Yard and shall also include all materials,

labor, equipment, and all else needed to complete the work under this item. No payment will be
made for materials delivered but not placed.

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City of Nashua

Financial Services Division

229 Main Street - Nashua, NH 03060 (603) 589-3171
Fax (603) 589-3209

September 16, 2016

TO: Mayor Donchess
Finance Committee

FROM: John Griffin, Chief Financial Officer/Comptroller

SUBJECT: Notification of entry into contract with a 3" party supplier for electricity supply.

On Thursday, September 15"", 2016, Financial Services competitively solicited and entered into an
agreement with a 3™ party energy supplier for the tariff-controlled supply portion of its electric utility
bills. Pursuant to the communication approved at the September 7", 2016 Finance Committee meeting,
please find attached the executed contract (“Exhibit A’’).

Contract Terms:
Fixed Price: $0.07010 per kWh
Fixed Term: 36 months beginning November 2017

To:

From:

Re:

C. Motion:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: May 25, 2022

Daniel Hudson, P.E., City Engineer
Engineering Department

Pavement Management Support Services

To approve the engineering contract for pavement management services with
Stantec Consulting Service, Inc. of Burlington, MA in an amount not to exceed
$31,700. Funding will be through Department: 160 Admin/Engineering; Fund:
Bond; Activity: Paving.

The City has contracted with Stantec Consulting Services, Inc. since 2016 to
provide assistance in evaluating the pavement condition of our 300 mile road
network and to make recommendations on rehabilitation and preservation methods.
Using their expertise, Stantec has provided assistance in developing the necessary
protocols for preventative maintenance, including updating costs and decision trees
for selecting prioritized lists of roadways to pave. This request is for $31,700 to
survey 33 percent of the City’s roadway network.

Last year Stantec satisfactorily performed a condition survey of the northern-third
of the City, this year it is proposed to survey the southern-third. Stantec will
continue to use Cartegraph’s pavement condition assessment software while
evaluating approximately 101 miles of roadway, and updating the Pavement
Condition Index (PCI) rating for each road segment. This information enables the
City to assess the paving program’s performance over time, monitor conditions,
and select appropriate treatments in an objective and transparent way.

ITEM 304.32 -CRUSHED GRAVEL FOR SHOULDER LEVELING
A. SCOPE

This work shall consist of furnishing and placing crushed aggregate to raise the edge of the
roadway shoulders as shown on plans or directed by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved City of Nashua Standard Specifications for Road
Construction, or the latest approved NHDOT Standard Specifications for Road and Bridge
Construction. The most stringent specification shall apply. Crushed gravel shall be compacted
with a powered hand compactor. Crushed gravel shall meet NHDOT specifications for Item
304.32.

C. MEASUREMENT AND PAYMENT

This item will be measured per ton placed in the field. Payment for crushed gravel will be by the
ton actually placed. Payment for this item shall be at the contract unit price per ton and shall also
include all materials, labor, equipment, and all else needed to complete the work under this item.
No payment will be made for materials delivered but not placed.

Contractor shall record the tons of material placed and compacted for each street. Recorded
totals shall be compared with Engineer’s records and observations on a daily basis when work on
this item is performed. Payment is contingent upon submittal of quantities in a per street format.

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ITEM 306.112 - RECLAIMED STABILIZED BASE PROCESSED IN
PLACE, 12” DEEP

A. SCOPE

This work shall consist of pulverizing the existing pavement together with subbase material to a
depth of 12 inches or as directed by the Engineer, removal and disposal of excess reclaim
material, fine grading to assure that finished surface matches existing gutter or as directed by the
Engineer, and compaction of materials to required densities. The surplus material removed from
this operation shall remain the property of the City of Nashua and shall be transported and stock
piled by the contractor at the Four Hills Landfill at 830 West Hollis St in Nashua.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor and equipment necessary for reclaimed
stabilized base, processed in place, in accordance with relevant provisions of section 306 of the
NHDOT Standard Specifications for Road and Bridge Construction, latest edition.

Surface preparation shall be subsidiary and shall include (but is not limited to) weed removal,
occasional pruning of trees, and removal of any vegetation impeding the work.

At the start of compaction on each street, the maximum density for the street shall be determined
by compacting a short (100 foot minimum length) test strip at a suitable moisture content until no
further increase in density can be obtained. The densities shall be obtained by use of nuclear
density testing equipment. A new test strip may be required by the Engineer where there is a
significant change in the character of material.

Compaction shall be accomplished using a vibratory sheep’s foot roller or pad foot roller with at
least 50,000 Ibs. of dynamic force. Final rolling shall be accomplished by a smooth steel wheel
vibratory roller with at least 27,000 Ibs. of dynamic force. Contractor shall also provide
compaction equipment sufficient to achieve required densities in areas not accessible by larger
equipment.

The reclaimed stabilized base shall be compacted to at least 95% of the average density of the
test strip.

Fine grading to proposed grades shall be subsidiary. Removal, transportation, and disposal of
surplus material are subsidiary.

After the site has been fine graded and compacted, the Contractor will allow a minimum of 1
working day for the city to review compacted base. Acceptance of the compacted base shall not
change the Contractor’s sole responsibility to assure the finished pavement has no puddles and
that the gutter profile generally matches existing conditions.

All catch basins must be protected from reclaimed materials by use of silt sacks. All materials,

labor, equipment, and transportation necessary to install, maintain, and remove the silt sacks
shall be subsidiary, including disposal of material.

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C. MEASUREMENT AND PAYMENT

This item shall be measured by the Square Yard of Reclaimed Stabilized Base Processed in
Place, 12” Deep. Payment for this item shall be at the contract unit price per Square Yard. This
payment shall also include all materials, labor, equipment, and all else needed to complete the
work under this item.

Contractor shall record the square yard of reclaimed area for each street. Payment is contingent
upon submittal of quantities in a per street format.

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ITEM 403.11 - HOT BITUMINOUS PAVEMENT (METHOD
SPECIFICATION), MACHINE METHOD

A. SCOPE

This work shall consist of furnishing and placing bituminous pavement to the depth shown on
the plans or ordered by the Engineer. Work shall also include obtaining asphalt samples and
asphalt cores on behalf of the City for quality control testing.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved NHDOT Sections 401, 403, and 411 as amended
herein.

Surface preparation shall be subsidiary and shall include (but is not limited to) weed removal,
occasional pruning of trees, and removal of any vegetation impeding the placement of
bituminous pavement. The existing surface shall be thoroughly dry and swept free of all dust,
dirt and loose material (including winter sand).

A tack coat shall be applied immediately prior to placement of hot bituminous pavement. Tack
shall also be applied to every cold joint on driveways, side streets, and where directed by the
Engineer. Tack is subsidiary.

The Contractor shall prevent any materials from entering drainage structures and shall clean out
structures as directed by the Engineer if materials enter them.

The Contractor shall correct drainage problems, as directed by the Engineer, when problems can
be corrected by placing asphalt.

The Contractor shall provide all materials, labor, equipment, and transportation necessary to tie
in areas at least 1 foot in from the edge of roadway. Contractor shall use a 1 ton steel drum roller
or heavier for compaction of these areas.

All Hot Bituminous Pavement Job Mixes require shop drawing approval.

Asphalt Binder grade for all Hot Bituminous Pavement Job Mixes shall be PG 64-28 unless
otherwise specified by the Engineer.

All 3/8” nominal aggregate Hot Bituminous Pavement Job Mixes shall conform to 75 Gyration
superpave mix design criteria. All ¥2” and *%%4” nominal aggregate Hot Bituminous Pavement Job
Mixes shall confirm to 50 Gyration superpave mix design.

Minimum Binder Content to be 6.0% for 3/8” mix designs; 5.8% for %” mix designs; and 4.9%

for %4” mix designs. All pavement mixes shall have a maximum Total Reused Binder (TRB)
content of 0.5% and meet all the volumetric mix design criteria.

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This required minimum asphalt content is based on the use of aggregate with a specific gravity of
2.65 to 2.70. The minimum asphalt content requirement may be adjusted when aggregate with a
higher specific gravity is used, or the minimum may be adjusted at the Engineer’s discretion if it
is believed to be in the best interest of the Department.

Hot Bituminous Pavement to be placed under NHDOT Section 401 “Method Requirements” (not
“QC/QA”).

Specific pavement mix and thickness for this contract shall be as specified in the Supplementary
Conditions or directed by the Engineer.

Testing:

Pavement testing will be completed by a testing agency selected by the City.

The Contractor shall furnish all materials, labor, equipment, and transportation necessary to take
loose asphalt samples, cut cores, and patch core hole as directed by the Engineer. Cores and
samples shall be delivered to a location in Nashua to be identified by the Engineer.

Cores shall be 6” in diameter and cut to the subbase. After core has been cut, contractor shall
thoroughly remove all water in the core hole, tack sides of core hole, fill hole with hot mix
asphalt, and compact until required densities are achieved. Contractor shall provide ice to cool
mix when ambient temperatures are high.

Contractor shall provide two container types. One shall be of sufficient size and quality to
contain 3 shovels full of asphalt. The other shall be of sufficient size and quality to contain a 6”
diameter core of varying thickness. Containers shall have an area for labeling.

Contractor and City shall agree to order of paving 24 hours prior to placement of mix. Paving
must be completed in a way that does not complicate tonnage tracking for identifying sample
locations. When directed by the Engineer, the Contractor shall pave an entire street or group of
streets before paving other streets.

C. MEASUREMENT AND PAYMENT

This item will be paid per Ton of placed, compacted, sampled, and cored hot bituminous
pavement, machine method as approved by the Engineer. A price adjustment for liquid asphalt is
provided in this contract as outlined in Item 900 Liquid Asphalt Adjustment. No payment will be
made for materials delivered but not placed.

Contractor shall record the tons of material placed and compacted for each street. Payment is
contingent upon submittal of quantities and delivery slips in a per street format.

Work and expenses associated with providing loose samples shall be incidental to this item.

Cores shall be measured and paid under Item 1010.9.

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ITEM 403.12 -HOT BITUMINOUS PAVEMENT, HAND METHOD
A. SCOPE

This work shall include paving using the hand method for driveways, curb patches, areas
between railroad crossings, areas where it is impractical to pave using machine method, as
shown on the plans, or as ordered by the Engineer. Hand method paving shall not be used where
machine method paving is required.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved NHDOT Sections 401, 403, and 411 as amended
herein.

All surface preparation shall be subsidiary to this item. The existing surface shall be thoroughly
dry and swept free of all dust, dirt and loose material (including winter sand).

A tack coat shall be applied immediately prior to placement of hot bituminous pavement. Tack
shall also be applied to every cold joint, and where directed by the Engineer. Tack is subsidiary.

Contractor shall use a 1 ton steel drum roller or heavier to achieve required compaction.

Asphalt mix design shall be the same as the wearing course unless otherwise specified by the
Engineer.

C. MEASUREMENT AND PAYMENT

This item will be paid per Ton of placed and compacted hot bituminous pavement, hand method
as approved by the Engineer. A price adjustment for Liquid Asphalt is provided in this contract
as outlined in Item 900 Liquid Asphalt Adjustment. No payment will be made for materials
delivered but not placed.

Contractor shall record the tons of material placed and compacted for each street. Payment is

contingent upon submittal of quantities in a per street format with respective station and offset
values.

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ITEM 403.6 - PAVEMENT JOINT ADHESIVE
A. SCOPE

This work includes the installation of pavement joint adhesive in locations as specified herein,
shown on the plans or as directed by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved NHDOT Standard Specifications for Road and
Bridge Construction, Section 401.2.12. Joint adhesive will be required on all longitudinal joints
in wearing course pavement excluding driveway and side road tie-in joints. Joint adhesive must
be on the NHDOT Qualified Products List.

C. MEASUREMENT AND PAYMENT

This item will be measured per Linear Foot completed in place and as ordered by the Engineer in
the field. Payment for this item shall be at the contract unit price per Linear Foot. This payment
shall include all materials, labor, equipment, and all else needed to complete the work under this

item.

Contractor shall record the linear feet of material placed for each street. Payment is contingent
upon submittal of quantities in a per street format.

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