[Added 12-2-2009 by L.L. No. 15-2009]
A. Description. Under this item, the contractor shall furnish all plant,
labor, materials, equipment, appliances and perform all operations
necessary to complete clearing and excavation for the placement of
corrugated polyethylene pipe of the size and corrugation as shown
on the plans, in the itemized proposal or as ordered by the Engineer.
B. General requirements.
(1)
Standard details. Pipe shall be placed in accordance with the
requirements of the construction standards of the Town of Union.
(2)
Excavation and backfill. All material of every description and
nature, necessary for proper installation of the work, shall be excavated
down to the depth as shown on the plans or as ordered by the Engineer.
Where necessary, additional material shall be brought to the site
to complete the backfilling. All excess material produced from excavation
shall be disposed of by the contractor, unless otherwise directed.
Where the excavated material is natural gravel, the excess shall be
stockpiled, as directed, for use by the Town.
(3)
Porous fill material shall be used to replace unsuitable material
where ordered by the Engineer.
(4)
Bedding shall be placed to the depth as shown on the plans or
as ordered by the Engineer.
(5)
Joints. Pipe shall be joined using a bell and spigot joint meeting
AASHTO M252, AASHTO M294 or ASTM F2306 as required for the various
pipes, as called for on the plans, in the proposal or as ordered by
the Engineer. Bell end of pipe will be placed on the upgrade end.
Coupling bands may be used in certain circumstances, with the approval
of the Engineer.
C. Materials.
(1)
Corrugated polyethylene pipe and fittings.
(a)
Corrugated polyethylene pipe and fittings shall conform to the
requirements of:
[1]
AASHTO M252, Specification for Corrugated Polyethylene Drainage
Tubing, three- to ten-inch diameter.
[2]
AASHTO M294, Specification for Corrugated Polyethylene Pipe,
twelve- to forty-eight-inch diameter.
[3]
ASTM D1056, Specification for Flexible Cellular Materials, sponge
or expanded rubber.
[4]
ASTM D1248, Specification for Polyethylene Plastics Molding
and Extrusion Materials.
[5]
ASTM D3350, Specification for Polyethylene Plastics Pipe and
Fittings Materials.
[6]
ASTM D2321, Practice for Underground Installation of Flexible
Thermoplastic Sewer Pipe.
(b)
The product supplied under this specification shall be high-density
polyethylene corrugated exterior/smooth interior pipe. Four- through
ten-inch diameters shall meet all the requirements of AASHTO M252
with the addition that the pipe shall have a smooth interior liner.
Twelve- to thirty-six-inch diameters shall conform to AASHTO M294
Type S. Forty-two-inch and forty-eight-inch diameters shall have minimum
pipe stiffness of 20 psi and 17 psi, respectively, at 5% deflection;
and shall meet all other requirements of AASHTO M294.
(c)
Material shall meet ASTM D1248 Type III, Category 4, Grade P33,
Class C; or ASTM D3350 Cell Classification 324420C.
(d)
Minimum conveyance factors shall be based on a Manning "n" value
of 0.010 and shall be as shown in Table 1.
|
Table 1
|
---|
|
Conveyance Factors
|
---|
|
Nominal Diameter
(inches)
|
Conveyance Factor
|
Nominal Diameter
(inches)
|
Conveyance Factor
|
---|
|
4
|
2.5
|
18
|
136.4
|
|
6
|
7.3
|
24
|
293.9
|
|
8
|
15.7
|
30
|
532.9
|
|
10
|
28.5
|
36
|
866.6
|
|
12
|
46.3
|
42
|
1,307.2
|
|
15
|
83.9
|
48
|
1,866.4
|
(e)
If couplings are used, coupling bands shall cover at least one
full corrugation on each section of pipe. When gasketed coupling bands
are required, the gasket shall be made of closed-cell synthetic expanded
rubber meeting the requirements of ASTM D1056, Type 2. Gaskets shall
be installed on the coupling band by the pipe manufacturer. All coupling
bands shall meet or exceed the soil tightness requirement of the AASHTO
Standard Specifications for Highway Bridges, Section 23, paragraph
23.3.1.5.4 (e). Pipe fittings shall conform to AASHTO M252 or AASHTO
M294. Fittings approved by the Engineer are also acceptable.
(2)
Backfill shall conform to Item 203.07, Select Granular Fill,
of the New York State Department of Transportation Standard Specifications
of latest issue.
(3)
Pipe bedding shall be sand, or approved equal which meets the
requirements for bedding as set forth in Section 620 of the New York
State Department of Transportation Standard Specifications of latest
issue.
D. Method. Installation shall be in accordance with ASTM D2321 and as
recommended by the pipe manufacturer. All pipe shall be laid true
to line and grade and shall have a full, firm and even bearing. Bedding
shall consist of sand placed to a depth of four inches in soil and
six inches in rock, unless otherwise directed by the Engineer. Pipe
laying shall begin at the downgrade end and progress in the upgrade
direction. The backfill shall be thoroughly compacted using vibratory
compaction equipment.
E. Backfill. The excavated trench shall be backfilled to one foot above
the pipe with bedding material. In pavement areas, the remainder of
the trench shall be backfilled with run-of-bank gravel, compacted
in twelve-inch lifts, no stones larger than three inches. In open
areas, the remainder of the trench shall be backfilled with suitable
excavated material, compacted in twelve-inch lifts, no stones larger
than 12 inches, except for the top one foot of the trench, which shall
be run-of-bank gravel.
F. Protection of new work. Movement of construction equipment and all
other vehicles and loads over and adjacent to any pipe shall be done
at the contractor's risk. When determined by the Engineer, any
pipe that is damaged or disturbed through any cause shall be replaced,
as ordered by the Engineer, at the expense of the owner.
G. Samples and testing.
(1)
All materials and products to be used in the construction shall
meet the quality requirements of Section 700, Materials Details, of
the New York State Department of Transportation Standard Specifications
of latest issue.
(2)
Any work performed with materials that fail to meet the required
test shall be removed and replaced by the contractor at his own expense.
[Amended 12-2-2009 by L.L. No. 15-2009]
A. Description. Under this section, the contractor shall
furnish all plant, labor, materials, equipment and appliances and
perform all operations necessary to complete clearing and excavation
for the placement of perforated galvanized corrugated steel pipe underdrain
of the size, gauge and corrugation as shown on the plans, in the itemized
proposal or as ordered by the Engineer.
B. General requirements.
(1) Standard details. Underdrain shall be placed in accordance
with the requirements of the construction standards of the Town of
Union and shall conform to the requirements of Section 605, Underdrains,
of the New York State Department of Transportation Standard Specification
of latest issue.
(2) Excavation and backfill. All material of every description
and nature, necessary for proper installation of the work, shall be
excavated to the depth as shown on the plans or as ordered by the
Engineer. Where necessary, additional material shall be brought to
the site to complete the backfilling. All excess material produced
from excavation shall be disposed of by the contractor, unless otherwise
directed. Where the excavated material is natural gravel, the excess
shall be stockpiled, as directed, for use by the Town.
(3) Porous fill material shall be used to replace unsuitable
material as ordered by the Engineer.
(4) Bedding shall be placed to the depth as shown on the
plans or as ordered by the Engineer.
(5) Joints shall be connected by use of coupling bands
as required for the various pipes as called for on the plans, in the
proposal, or as ordered by the Engineer.
C. Material.
(1) PVC underdrain and fittings shall conform to the requirements
of Section 706-18, Perforated Polyvinyl Chloride Underdrain, of the
New York State Department of Transportation Standard Specifications
of latest issue.
[Amended 12-2-2009 by L.L. No. 15-2009]
(2) Run-of-bank gravel shall conform to Item 203-07, Select
Granular Fill, of the New York State Department of Transportation
Standard Specifications of latest issue.
(3) Gravel filter material shall conform to Item 605.0901,
Underdrain Filter, Type I, of the New York State Department of Transportation
Standard Specifications of latest issue.
D. Method.
(1) The pipe shall be installed true to line and grade
in accordance with the method specified on either the plans or the
Standard Detail Sheet and shall be in conformance with one of the
following criteria:
(a)
Pipe installed in a subgrade section shall be
bedded on not less than four inches of compacted filter material and
shall have not less than six inches of filter material each side and
above the pipe. The remainder of the underdrain installation section
shall be completed using materials in accordance with the Standard
Detail Sheet or as indicated on the plans.
(b)
Pipe installed in a trench section shall be
bedded on filter material in accordance with the requirements for
underdrain as shown on the Standard Detail Sheet. The filter material
shall be carefully placed by hand shoveling on each side and to a
depth of at least six inches over the top of the pipe. The pipe trench
shall then be filled with materials in accordance with the Standard
Detail Sheet. Special care shall be taken to ensure that neither the
alignment nor grade of the pipe is disturbed.
(2) Perforations shall be placed down unless the plans
or special provisions indicate otherwise.
E. Protection of new work. Movement of construction equipment
and all other vehicles and loads over and adjacent to any pipe shall
be done at the contractor's risk. When determined by the Engineer,
any pipe that is damaged or disturbed through any cause, shall be
replaced, as ordered by the Engineer, at the expense of the contractor
and at no cost to the owner.
F. Samples and testing.
(1) All materials and products to be used in the construction
shall meet the quality requirements of Section 700, Materials Details,
of the New York State Department of Transportation Standard Specifications
of latest issue.
(2) Any work performed with materials that fail to meet
the required tests shall be removed and replaced by the contractor
at his own expense.
[Added 3-2-2005 by L.L. No. 3-2005;
amended 12-2-2009 by L.L. No. 15-2009]
A. Description. Under this section the contractor shall
furnish all labor, equipment, materials and supplies in performing
all operations necessary in connection with the application of a single
bituminous surface treatment upon the designated surface, in complete
and strict accordance with the specifications contained herein, or
as specifically directed by the Engineer. The bituminous surface treatment
shall consist of properly applied asphalt emulsion and aggregate,
spread evenly on the surface, and compacted, as specified herein,
and as directed by the Engineer. The surface treatment, when cured,
shall have an homogenous appearance, fill all cracks, and adhere firmly
to the adjacent surface, and shall have a skid-resistant texture.
B. General requirements.
(1) Standard details. This work shall consist of the construction
of a single-course bituminous surface treatment in accordance with
these specifications and the construction standards of the Town of
Union or Broome County, within their respective right-of-way.
(2) The publications listed below form a part of this
specification to the extents referenced. The publications are referred
to in the text by the basic description only.
(a)
Standard Specifications Construction and Materials,
Office of Engineering, NYSDOT of latest issue:
[1]
Section 410, Bituminous Surface Treatment.
[2]
Section 702, Bituminous Materials.
[3]
Section 703, Coarse Aggregates.
[4]
NYSDOT Materials Method 8, Sampling Bituminous
Materials.
(b)
American Society for Testing and Materials (ASTM):
[1]
C-88, Soundness of Aggregate by Magnesium Sulfate.
[2]
C-127, Specific Gravity and Absorption of Coarse
Aggregate.
[3]
C-136, Sieve Analysis of Coarse Aggregates.
[4]
D-5, Penetration of Bituminous Material.
[5]
D-75, Sampling Stone, Slag and Gravel for use
as Highway Materials.
[6]
D-113, Ductility for Bituminous Materials.
[7]
D-244, Testing Emulsified Asphalts.
[8]
D-977, Emulsified Asphalts.
[9]
D-1369, Quantities for Bituminous Surface Treatments.
[10]
D-2042, Solubility of Asphalt Materials in Trichloroethylene.
[11]
D-2397, Cationic Emulsified Asphalt.
[12]
D-2995, Determining Application Rate of Distributors.
C. Material.
(1) Bituminous materials. The bituminous material required
for the surface treatment course shall meet the requirements of NYSDOT
Section 702, Bituminous Materials (for HFRS-2P see Table 3-1). The
type and grade of bituminous material shall be HFMS2, RS-2, CRS-2,
HFRS2 or HFRS-2P. The type of emulsion and rate of application shall
be determined based on the required test patches. The bituminous material
shall be supplied from a firm listed as a supplier on the NYSDOT approved
list of liquid bituminous material primary sources and/or suppliers.
Copies of the approved list and written procedures for achieving and
maintaining approved list status are available from NYSDOT Materials
Bureau, 1220 Washington Avenue, Albany, NY 12232. If the specified
bituminous material is not compatible with the aggregate type selected
for use at the time of construction, the Engineer may order the contractor
to provide an alternate bituminous material.
(2) Aggregates.
(a)
The aggregates for surface treatments shall
be crushed stone, crushed gravel or crushed slag meeting the requirements
of NYSDOT Section 703-02, Coarse Aggregates. In addition, any aggregate
used for surface treatment on pavement shall not contain more than
5% chert. Nor shall the amount of material passing the 200 sieve exceed
1.0%.
(b)
The aggregate size for single course on pavements
shall be NYSDOT No. 1 ST or No. 1A, as determined by the Engineer.
D. Method.
(1) Bituminous surface treatment, two-course for pavements.
(a)
Weather limitations. Bituminous material shall
not be applied to an excessively wet surface, when the ambient air
temperature is less than 50° F. and falling or when weather conditions
would prevent the proper construction of the surface treatment. The
surface on which the bituminous material is applied shall have a temperature
of 50° F. or higher. The operation should not be carried out in
the rain or when rain is threatening.
(b)
Equipment:
[1]
The following equipment shall be required:
[a]
A bituminous distributor.
[b]
Sufficient pneumatic tire rollers.
[c]
A self-propelled aggregate spreader.
[2]
A bituminous distributor shall be so designed,
equipped, maintained and operated so that the bituminous material
at even heat can be applied uniformly on variable widths of surface
up to 15 feet at readily determined and controlled rates from 0.05
to 2.0 gallons per square yard, with uniform pressure, and with an
allowable variation from any specified rate not to exceed 0.02 gallons
per square yard. Distributor equipment shall include tachometer, accurate
volume measuring devices or a calibrated tank, and a thermometer for
measuring temperatures of tank contents. Distributors shall be equipped
with a separate power unit for the pump, and full circulation spray
bars adjustable laterally and vertically.
[3]
The distributor and/or transport shall be equipped
with a sampling valve so designed and installed as to be non-clogging
and safe. The type of valve and its general location shall be according
to written instructions by the NYSDOT Materials Method 8.1. When samples
are taken through such valves, in accordance with NYSDOT Materials
Method 8.2. instructions, they shall be considered representative
of all material in the tank.
[4]
The pneumatic tire rollers shall be self-propelled
and have oscillating wheels with smooth tread tires. The tire or contact
pressure shall be specified by the Engineer. The Engineer will require
a sufficient number of pneumatic tire rollers to permit initial rolling
of the aggregate to occur within five minutes of the application of
the bituminous materials and the final of the three coverages to be
completed within 30 minutes of the application of the bituminous material.
The rollers shall be operated at a maximum speed of five miles per
hour.
[5]
The aggregate spreader shall be a self-propelled
unit capable of uniformly spreading the aggregate at a rate and width
specified by the Engineering with an allowable variation not to exceed
0.5 pounds per square yard. The spreader hopper shall have a minimum
spread width of 12 feet with gate openings graduated so that the spread
widths can be adjusted in six-inch increments. The spreader shall
be equipped with a self-locking hitch with a minimum ninety-degree
vertical movement. The machine shall have sufficient power and traction
to pull loaded aggregate trucks on any street/road to be surface treated.
The spreader shall meet the approval of the Engineer.
(c)
Determination of the quantities of materials
to be applied. The quantity of bituminous material to be used shall
be in a range of 0.25 to 0.50 gallons per square yard unless directed
otherwise by the Engineer. Cover aggregate shall be spread in the
range of 15 to 25 pounds per square yard unless otherwise directed
by the Engineer. To determine the rate to be used, the contractor
shall place a minimum of three test patches at locations determined
by the Engineer for each aggregate size. Each test patch shall be
approximately three square yards and placed with the quantity of bituminous
material and aggregate as directed by the Engineer. All test patches
shall be compacted in the same manner as required by these specifications.
Construction of the test patches shall be completed a minimum of 14
days prior to the placement of the bituminous surface treatment. The
quantity of bituminous material and aggregate to be used will be determined
by the Engineer after observing the performance of the test patches.
The Engineer will not require test patches on each street but rather
patches in three representative areas for 1ST and 1A stone application.
Surface preparation which may include pothole patching, truing and
leveling, adjusting of irons (valve covers, manhole covers, drop inlet
gratings), etc. will be the responsibility of the street municipality
and will be completed before the contractor moves onto the job. A
power broom shall be used to clean any loose material from the pavement
surface before the bituminous material is applied. Manhole covers,
drop inlets, catch basins, curbs and any other structures within the
shoulder areas should be protected against the application of the
surface treatment materials.
(d)
Applying liquid bituminous materials. Bituminous
materials shall be applied by means of a pressure distributor in a
uniform continuous spread over the section to be treated and within
the temperature range specified. The quantity of bituminous material
to be spread shall be as determined by the Engineer. The allowable
variation from this quantity shall not exceed 0.02 gallons per square
yard. A strip of building paper, at least three feet in width and
with a length equal to that of the spray bar of the distributor plus
one foot, shall be used at the beginning of each spread. If the cut-off
is not positive, the use of paper may be required at the end of each
spread. The paper shall be removed and disposed of in a satisfactory
manner. The distributor shall be moving forward at a proper application
speed at the time the spray bar is opened. Any skipped areas or deficiencies
shall be corrected. Junctions of spreads shall be carefully made to
assure a smooth riding surface. The bituminous material shall not
be applied more than 300 feet in advance of the self-propelled stone
spreader. The spread of bituminous material shall not be more than
six inches wider than the width covered by the cover coat material
from the spreading device. Under no circumstances shall operations
proceed in such a manner that bituminous material will be allowed
to chill, set up, dry, or otherwise impair retention of the cover
aggregates. The distributor, when not spreading, shall be parked so
that the spray bar or mechanism will not drip bituminous material
on the surface of the traveled way.
(e)
Application of the cover aggregate. Immediately
following the application of bituminous material, cover aggregate
shall be spread at the rate determined by the Engineer. The allowable
variation from this rate shall not exceed one pound per square yard.
All aggregate used bituminous surface treatment shall be clean as
determined by visual inspection of the Engineer at the time of placement.
Spreading shall be accomplished in such a manner that the tires of
the aggregate spreader at not time contact the uncovered and newly
applied bituminous material. Immediately after the cover aggregate
is spread, any deficient areas shall be covered by additional material.
If the application of the aggregate cover by the spreader is not uniform,
the Engineer may order the contractor to repair the section before
rolling. Pneumatic tired rolling shall begin immediately and shall
be continued until three complete coverages are obtained within 30
minutes of the application of the bituminous material. Any free bituminous
material on the surface caused by a deficient amount of cover aggregate
shall be covered in such a manner so as not to displace imbedded material.
Excess material shall be swept from the entire surface by means of
brooms. The surface shall be swept at the time determined by the Engineer.
(f)
Traffic control.
[1]
Traffic control in work zones shall be provided
as per the NYS Manual of Uniform Traffic Devices and all signs, barricades,
and signaling devices will be in accordance with this manual to protect
both the public and the contractor's personnel. Flaggers will be provided
to guide and direct traffic around contractor's operation and to control
traffic speed on completed work.
[2]
Opening to traffic.
[a]
Unless otherwise specified, the highway shall
be kept open to traffic at all times. Traffic shall be discontinued
on the lane being surface treated; and as soon as the final layer
is applied and rolled, controlled traffic may be permitted thereon.
Traffic shall be maintained at a speed not to exceed 15 miles per
hour for a period of four hours after placement of the surface treatment
by the use of two-way radio-equipped patrol vehicles in accordance
with the maintenance and protection of traffic details shown on the
plan.
[b]
All patrol vehicles shall be equipped with signs
meeting the requirements of Section 254.4 of the Manual of Uniform
Traffic Control Devices The required number of two-way-radio-equipped
vehicles shall be as follows:
|
Lane Miles Length of Surfacing for Past
4 Hours
|
Number of Patrol Vehicles
|
---|
|
1
|
1
|
|
2
|
3
|
|
3
|
4
|
|
4
|
6
|
|
5
|
7
|
|
6
|
9
|
|
7
|
10
|
E. Protection of new work. The contractor shall assume
full responsibility for any contamination and/or degradation of any
part of this course during construction and shall, at his own expense,
remove any and all portions of this course which do not conform to
the requirements of these specifications and replace these portions
with specified material.
F. Samples and testing.
(1) All materials and products to be used in the construction
shall meet the quality requirements in Section 700, Materials Details,
of the New York State Department of "Transportation Standard Specifications
of latest issue.
(2) Any work performed with materials that fail to meet
the required tests shall be removed and replaced by the contractor
at his expense.
|
Table 3-1
Specifications for High-Float Asphalt
HFRS-2P (Polymer Modified)
|
---|
|
The emulsion is a high-float, rapid-setting
emulsion. It shall be homogeneous and shall meet the following requirements.
|
|
Polymer modified conform to the following:
|
|
|
|
Minimum
|
Maximum
|
---|
|
Properties (a)
|
|
|
|
|
Viscosity, Saybolt Furol @ 122° F.
|
(SOC), sec
|
100
|
400
|
|
|
Storage stability, 24 hour, %
|
1.0
|
|
|
|
|
Demulsibility, 0.02 N CaCl2,%
|
|
60
|
|
|
|
Sieve test1%
|
|
|
0.10
|
|
|
Polymer, Wt. %
|
|
2
|
|
|
Distillation (b)
|
|
|
|
|
|
Oil distillate, by volume of emulsion, %
|
|
|
3.
|
|
|
Residue from distillation,
|
63
|
|
|
|
Tests on residue from distillation:
|
|
|
|
|
|
Penetration, 77° F. (25 C) bOg., 5 sec
|
|
100
|
200
|
|
|
Ductility, 39.2° F. (4 C), 5cm/minute, cm.
|
|
50
|
|
|
|
Float test @ 140° F. (60 C), sec
|
|
1,200
|
|
|
|
Solubility in trichloroethylene, %
|
|
97.5
|
|
|
|
Viscosity @ 140°F, @ sec-1, Poise (c)
|
|
1,500
|
|
(a)
All tests shall be run in accordance with ASTM
D-244 except as noted.
(b)
ASTM D-244 except that the maximum temperature
that the material shall be subjected to is 383° F. ilO° F.
(c)
ASTM Method P-160 published 1984.
|
The emulsion shall remain homogeneous and usable
for a minimum of 30 days. The supplier will not be held responsible
for emulsion test of samples that have frozen before testing.
|
|
The polymer shall be added at the time of manufacture
of the emulsion.
|
|
Material that does not fully comply with these
specifications will be rejected. The supplier shall be responsible
for the cost and disposal of rejected material.
|
|
If the low bidder is unable to supply material
as specified when ordered, the right is reserved to order material
from the next bidder and bill the low bidder any additional incurred
costs.
|