Search

Under this pavement type, the Contractor shall be responsible for removing and resetting all
curbing that is disturbed during construction to existing grades at no additional cost to the
Owner. All bituminous concrete berms disturbed during construction operations shall be
replaced at no additional cost to the Owner and shall be set to existing grades and shall
maintain proper drainage.

Under this pavement type, all signs and sign posts disturbed during construction operations
shall be removed and reset. Any signs that have been damaged shall be replaced and set at
existing grades and locations at no additional cost to the owner.

No trees within the project limits shall be under cut or destroyed. The Contractor is
responsible for protecting all trees and their root systems from all adjacent construction
operations. Any trees disturbed or destroyed shall be replaced with no additional
compensation. All surface areas outside the paved roadway surface area that are disturbed
during construction shall be repaired with 4 inches of loam with seed at no additional cost to
the Owner.

1.04 REFERENCES

The following standards form a part of these specifications and indicate the minimum
standards required:

American Society for Testing and Materials (ASTM):

ASTM D1557 Test for Moisture-Density Relations of Soils and Soil-Agegregate
Mixtures Using 10 Pound Rammer and 18-Inch Drop

State of New Hampshire Department of Transportation (NHDOT) Standard
Specifications for Road and Bridge Construction, latest edition:

Section 304 Gravel Base Course
Section 401 Bituminous Concrete Pavement - Table 2 Composition of Mixes
Section 632 Reflectorized Pavement Markings

Prime and Tack Coats - shall conform to the NHDOT Standards

Federal Specifications:
SS-S-164 Sealing Compound, Hot Poured Type, for Jomts in Concrete
SS-S-1401C Sealants, Joint, Non-Jet-Fuel-Resistant, Hot Applied, for Portland

Cement and Asphalt Concrete Pavement

02745-3

1.05

SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF GENERAL
SPECIFICATIONS, SUBMIT THE FOLLOWING:

A. Six sets of complete job mix formula shall be submitted to the Engineer at least two
weeks before any of the work of this section is to begin.

B. Delivery slips shall be furnished with each load of mix delivered to the project.
Information shall include:

Vehicle identification.

Date.

Project.

Identification of material.

Gross, tare and net weights.

Signed by the bituminous concrete producer.
Stamped by a licensed public weighmaster.

NAN WN

PART2-PRODUCTS

2.01 CRUSHED GRAVEL SUBBASE:

A.

2.02

2.03

Crushed gravel subbase shall consist of inert material that is hard durable stone and coarse
sand, free from loam and clay, surface coatings and deleterious materials.

Gradation requirements for gravel subbase shall be as specified in NHDOT Standard
Specifications Section 02300, EARTHWORK for Crushed Gravel.

BITUMINOUS CONCRETE PAVEMENT:

Bituminous concrete pavements shall consist of Class I Bituminous Concrete, Type 1-1.
Bituminous concrete mixtures shall be within the composition limits of base courses, binder
courses, top courses and surface treatment, in accordance with NHDOT Standard

Specifications Section 401, that conform to Table 2.

Unless authorized by the Engineer, no Job-Mix Formula will be approved which specifies:
Less than 4% passing No. 200 for Top Course.

Less than 6% bitumen for Top Course.

The joint sealant shall be a hot poured rubberized emulsified asphalt sealant meeting the
requirements of Federal Specifications SS-S-1401 or SS-S-164.

The tack coat shall be an asphalt emulsion, RS-1, CRS-1, HFMS-1 CSS-1 if required.
SEAL COAT:

Seal coats shall be within the composition limits for protective seal coat emulsion in
accordance with NHDOT Standards.

02745-4

B. — Silica sand when blended with seal coat emulsion shall be No. 30 silica sand.

2.04 PAVEMENT MARKINGS:
A. Pavement markings shall conform to the requirements of NHDOT Standard Specifications
632

B. — The mixture of the marking material shall be within the composition limits for reflectorized
pavement markings as described in the NHDOT Standard Specifications as follows:

Thermoplastic reflectorized pavement markings - 632.

C. Application of the glass beads to be used as reflector material on the striping shall conform to
Section 632 of the NHDOT Standard Specifications.

PART3-EXECUTION
3.01 GENERAL:

Paving courses required for the project shall be as shown on the drawings and as specified
herein. Pavement thicknesses specified are measured in compacted inches. If a pavement
course thickness exceeds 2-1/2 compacted inches, the course shall be installed in multiple
lifts with each lift not exceeding 2-1/2 compacted inches in thickness.

3.02 GRAVEL SUBBASE:

A. The crushed gravel subbase to be placed under pavement shall consist of 12-inches of crushed
gravel evenly spread and thoroughly compacted.

B. _ The gravel shall be spread in layers not more than 4-inches thick, compacted measure. All
layers shall be compacted to not less than 95 percent of the maximum dry density of the
material as determined by ASTM D1557 Method C at optimum moisture content.

3.03 TEMPORARY BITUMINOUS PAVEMENT:

A. — Where specified and directed by the Engineer and after placement of the Crushed gravel
sub-base, the Contractor shall place temporary bituminous pavement above the trench,
between the edges of the existing pavement. It shall consist of Class I Bituminous Concrete
Pavement, Type 1-1, 2-inches thick, in accordance with NHDOT Standard Specifications
Section 401.

B. The temporary pavement shall be repaired as necessary to maintain the surface of the
pavement until replaced by permanent pavement. When so directed by the Engineer, the
Contractor shall remove the temporary pavement and install or regrade the sub-base for
installation of permanent pavement.

3.04 PERMANENT BITUMINOUS PAVEMENT:

A. The bituminous paving mixture, equipment, methods of mixing and placing, and the
precautions to be observed as to weather, condition of base, etc., shall be in accordance
with NHDOT Standard Specifications Section 401.

02745-5

B. BASE COURSE AND BINDER COURSE PAVEMENT:

1. Immediately prior to installing the base and/or binder course, the trimmed edges shall
be made stable and unyielding, free of loose or broken pieces and all edges shall be
thoroughly broomed clean. Contact surfaces of trench sides, curbings, manholes,
catch basins, or other appurtenant structures in the pavement shall be painted
thoroughly with a uniform coating of asphalt emulsion (tack coat), just before any
mixture 1s placed against them.

2. The binder course shall be repaired as necessary to maintain the surface of the
pavement until placement of the permanent overlay. If required, the Contractor shall
place a leveling course before placing the permanent overlay.

C. TOP COURSE OR SURFACE TREATMENT PAVEMENT (PERMANENT OVERLAY):

3.05

A.

1. | Top course or surface treatment shall be placed over the full width as shown on
the drawings or as specified.

2. Prior to placement of the top course or surface treatment, the entire surface over
which the top course or surface treatment is to be placed shall be broom cleaned and
tack coated.

3. Top course or surface treatment pavement placed over trenches may be feathered to
meet existing paved surfaces, if approved by the Engineer.

4. Prior to placing full width top course or surface treatment pavements, keyways shall
be cut in all intersecting streets.

COLD PLANING

The Contractor shall remove bituminous concrete pavement by use of an approved "cold
planer" equipment to a depth sufficient to apply an overlay of 2 inches of bituminous
concrete pavement. Existing pavement shall be removed to a depth of 2 inches at the road
centerline and 3 inches at the curb line.

The equipment shall be capable of accurately and automatically establishing profile grades
along each edge of the machine by referencing from the existing pavement by means of a
ski or matching shoe from an independent grade control and shall have an automatic
system for controlling cross slope at a given rate.

The machine shall be equipped with an integral loading means to immediately remove
material being cut from the surface of the roadway and discharge cuttings into a truck, all in
one operation. All planning machinery shall be equipped with dust-control devices to
prevent any dust produced in the cutting operation from escaping into the air.

The bituminous surfaces being planed and profiled shall be removed to a depth, width,

grade and cross section directed by the Engineer. Loose material resulting from the
operation shall be the property of the Owner unless otherwise directed by the Engineer.

02745-6

E.

The planed surface shall provide a smooth riding surface free from severe gouges,
continuous grooves, ridges, oil film and other imperfections of workmanship and shall have a
uniform surface appearance exclusive of broken or cracked underlying pavement.

All existing pavement around castings shall be removed with hand cold planing equipment or
by the use of hand tools if necessary. Any castings damaged or disturbed shall be
removed and replaced as directed by the Engineer, at the Contractor's expense.

3.06 PAVEMENT PLACEMENT:

A.

3.09

A.

Unless otherwise permitted by the Engineer for particular conditions, only machine
methods of placing the pavement shall be used. The equipment for spreading and finishing
shall be mechanical, self-powered pavers, capable of spreading and finishing the mixture
true to line, grade, width and crown. The mixtures shall be placed and compacted only at
such times as to permit proper inspection and checking by the Engineer.

After the paving mixtures have been properly spread, initial and intermediate compaction
shall be obtained by the use of steel wheel rollers having a weight of not less than 240
pounds per inch width of tread.

Final rolling of the top course or surface treatment pavement shall be performed by a steel
wheel roller weighing not less than 285 pounds per inch width of tread at a mix
temperature and time sufficient to allow for final smoothing of the surface and thorough
compaction.

Immediately after placement of top course or surface treatment pavement, all joints
between the existing and new top course or surface treatment pavements shall be sealed
with hot poured rubberized asphalt sealant meeting the requirements of Federal
Specification SS-S-1401 or SS-S-164.

Where there is no backing for the edges of the curb-to-curb pavement, the Contractor shall
provide a gravel transition. The gravel transition shall be installed immediately after the
pavement is placed, shall be feathered and extend a minimum of 18 inches, and shall be
compacted using the same equipment as for pavement compaction. The gravel shall be
uniformly graded material with a maximum size of 3/8 to 1/2 inch.

When directed by the Engineer, the Contractor shall furnish and install additional paving to
provide satisfactory transition for driveways and walkways impacted by a new curb-to-curb
pavement installation. The transition installation will be considered incidental to the
curb-to-curb pavement installation.

RAISING AND ADJUSTING CASTINGS:

In areas of permanent top course paving, existing municipally-owned catch basin and
manhole castings and valve boxes shall be raised to the proper grade where directed by the
Engineer.

Castings owned by private utilities shall be raised by their own forces. The Contractor
shall be responsible for coordinating this work.

02745-7

3.10

A.

3.11

The method of adjusting these castings shall be as follows: Cut around catch basin or
manhole castings a minimum of 8-inches from casting. Excavate and if required rebuild up to
12-inches of masonry below the bottom of the casting. Backfill with suitable material and
compact to bottom of casting. Place high, early strength cement or bituminous
concrete collar, as directed, to approximately 1 '/2-inches below the raised casting grade.
Masonry work shall conform to Section 02631, PRECAST MANHOLES AND CATCH
BASINS.

In some areas, raising of castings may not be required. Where directed by the Engineer,
castings not to be raised shall have at least 12-inches of bituminous concrete pavement
chipped and removed around the casting. New bituminous concrete pavement shall be
placed and compacted around such castings to approximately 1-1/2-inches below the top of
the casting. The overlay course shall then be sloped down to the level of the casting.

The method of raising valve boxes shall be as follows: Cut around valve box a minimum of
8-inches from valve box. Excavate as required and raise the valve box. Pour high early
strength cement or bituminous concrete collar, as directed, to approximately 1-1/2-inches
below the top of the valve box.

Castings which need to be raised or adjusted to complete permanent curb to curb paving
shall be done immediately prior to paving.

PAVEMENT MARKINGS:

The Contractor shall replace all pavement markings removed or covered-over in carrying out
the work, and as directed by the Engineer, no sooner than 48 hours after completion of
permanent pavement. The markings and respective mixture and application requirements
shall conform to the requirements of NHDOT Standard Specifications Section 632.

When directed by the Engineer, the Contractor shall provide temporary markings at no
additional cost to the Owner.

PAVEMENT REPAIR:
If required in the contract or if permanent pavement becomes rough or uneven, permanent
pavement patches and trenches shall be repaired and brought to grade utilizing "infrared"

paving methods following completion of the construction.

The Contractor performing the work shall use care to avoid overheating the pavement
being repaired.

Pavement repair shall extend a minimum of 6-inches beyond all edges of the pavement
patch to assure adequate bonding at the pavement joints.

END OF SECTION

02745-8

SECTION 02745A

LOOP DETECTORS, AND PAVEMENT MARKINGS

LOCAL TRAFFIC LOOPS 6’ X 50’ (2-4-2 TURN)

A. SCOPE

This work consists of furnishing all labor, materials and equipment necessary to install the
quadruple loop detectors as directed by the Engineer.

B. MATERIALS AND CONSTRUCTION

This item shall include all labor, materials and equipment necessary to install new quadruple loop
detectors 2-4-2 turn, in conjunction with the paving program. Loops shall be installed in the
pavement surface prior to final overlay or top course.

a. Installation shall be in accordance with the details provided in Plan Drawings:
e Typical wire loop diagram
e Quadruple loop installation saw cut detail
e Loop detector segment detail
e Detector box out detail stage 1: at paving
e Detector box out detail stage 2: at loop installation
b. The City of Nashua will connect the new loop in the control panel if needed
c. Contractor will make connection in pull box. Contractor will solder, wire nut and
silicone seal connections for new loop at pull box. “Hockey puck” will not be used.

C. MEASUREMENT AND PAYMENT

Payment for loop detector installation shall be at the contract unit price specified for each and
shall include full compensation for material and labor to complete this portion of the Bid
Schedule.

RETROREFLECTIVE PAVEMENT MARKINGS

A. SCOPE

This work shall consist of furnishing and placing white or yellow retro reflective paint pavement

markings and retro reflective thermoplastic pavement markings at locations shown on the plans
or as ordered by the Engineer.

02745A-1

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all labor, materials, equipment and transportation necessary for the
required placement of retro reflective paint and thermoplastic pavement markings in accordance
with Section 632 of the most current edition of the NHDOT Standard Specifications for Road
and Bridge Construction and the most current edition of the MUTCD. Striping shall match
existing striping and be replaced in kind or as directed by the Engineer. All stop bars, crosswalks
and symbols shall be retro reflective thermoplastic and all long lines shall be retro reflective
paint.

C. MEASUREMENT AND PAYMENT

Retro reflective Paint Pavement Marking,
Single Solid Line, 4in. Linear Foot

Retro reflective Thermoplastic Pavement Marking,
Single Solid Line, 12in. Linear Foot

Retro reflective Thermoplastic Symbol Square Foot

02745A-2

SECTION 02769

PNEUMATIC ASSISTED AND SEGMENTAL STATIC HDPE SLIPLINING

PART 1 - GENERAL
1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and
Supplementary Conditions, apply to this section.

1.2 SUMMARY
A. This Section includes the following:

1. Furnishing all plant, labor, equipment and materials, cleaning,
internal inspection, point repairs, and performing all operations in
connection with the furnishing and the insertion of high density
polyethylene pipe (HDPE) inside the existing host pipe using
pneumatically assisted sliplining. Work shall include cleaning and
videotaping the existing sewer lines, as specified in pertinent
sections of the Contract specifications, flow handling and/or bypass
pumping of existing flows (if required), maintaining surface water
drainage services, and any restoration work needed to replace
damaged structures and landscaping or ground conditions.

2. It shall be the responsibility of the Contractor to perform the work
under this contract in a sequence which is the least disruptive to the
normal flow of vehicular and pedestrian traffic, and in a manner
which will protect the public from damage to person and property
within the limits of and for the duration of the contract.

3. Host Pipe is defined as the existing sanitary, storm drain and/or
combined sewer to be replaced by sliplining.

4. Renewal Pipe is defined as new High Density Polyethylene pipe
(HDPE) to be installed inside the host pipe.

1.3 SUBMITTALS

A. General: Submit each item in this Section according to the Conditions of
the Contract.

02769-1

For the pneumatically assisted sliplining method(s) of pipe rehabilitation, the
Contractor shall submit the following information specific to the proposed
project.

1. Name(s) of all supervisory personnel to be directly involved with
each pneumatically assisted sliplining method of pipe renewal for
this project. Supervisory personnel shall have a minimum of two
years experience and two completed projects for the installation of
pneumatically assisted sliplining renewal pipe within the past five
years. Attach resumes of each person named. Resume information
shall include, as a minimum, the number of years in a supervisory
capacity and a list of projects worked on within the past five years,
describing the type of construction, project description, complexity,
contract amounts, and educational background.

2. Describe the pipe renewal method(s) proposed on this Contract,
including, but not limited to, the following:

a. Name, business, address, and telephone number of each
sliplining manufacturer of the pipe rehabilitation method
proposed; a description of each method; and any variances
that the Contractor may be proposing from the specified
methods.

b. Hours of operation, sequencing of work description, number
of shifts, number of crews, and expected time to complete
the work for each renewal method proposed.

C. Describe any surface activities that will be required and any
mitigative measures that will be used to reduce surface
impacts as part of each renewal method proposed.

d. Describe rehabilitation method, manufacturer, including
sequencing of operations, scheduling, time of completion,
hours of operation, surface impacts, access and staging
location(s), and other considerations that may be pertinent to
the proposed work.

3. The Contractor shall sign and date the information provided and
certify that to the extent of his knowledge, the information is true
and accurate, and that the supervisory personnel and method(s) of
pipe rehabilitation proposed will be directly involved with and used
on this project, respectively. Substitutions of personnel and/or
methods will not be allowed without written authorization of the
Engineer.

02769-2