[Adopted 10-25-1989 by L.L. No. 4-1989 (Ch. 34 of the 1977
Code)]
[1]
Editor's Note: The Village's street specifications and related
drawings are on file in the Village offices.
A.
It is the purpose of these specifications to establish minimum acceptable
methods of street construction, including widths and development of
rights-of-way, paved roadway, storm drainage and other utilities in
the Village of Hillburn. Dedication of the right-of-way will not be
accepted until the Village Engineer shall have certified to the Village
Board that the development of the street has been completed in accordance
with the approved plans and the specifications which follow.
B.
The term "Village Engineer," when used in these specifications, shall
be deemed to include the Village Engineer and his designees.
A.
Plans of the proposed street shall be prepared by a qualified engineer
properly licensed by the State of New York or land surveyor possessing
a proper exemption certificate issued by the State of New York Education
Department. The plan shall clearly define the limits of the proposed
right-of-way and shall include the location, width, profile and grades
of proposed roadways, storm drainage, including culverts and other
drainage structures, and the location of easements and utilities.
Plans shall be submitted to the New York State Department of Transportation
when any street drains toward or connects to a state highway and to
the Village Planning Board for review and approval under the applicable
subdivision and site plan regulations of the Village. Plans so submitted
shall not be altered or amended after having been approved by the
Planning Board, except after amended plans have been resubmitted and
approved as above. However, the developer shall, at his own expense,
provide additional storm drainage facilities as may be ordered by
the Village Engineer or New York State Department of Transportation
Resident Engineer, where such additional structures or facilities
are necessary to assure the durability of pavement and future maintenance
of right-of-way.
B.
All street plans shall be developed in concert with a tree plan of
the site, and the final location of the streets shall be established
such that the loss of the major trees and unusual tree specimens is
minimized.
A.
The developer's engineer/surveyor shall establish and clearly mark
on the site the limits of the right-of-way, the center line and grades
of the roadway and the location and elevation of drainage structures.
Such markers shall be maintained at the developer's expense until
construction of the roadway, drainage, curbs and shoulders has been
completed and accepted by the Village Engineer.
B.
The entire width of the right-of-way shall be cleared and shaped
to the grades and elevations established by the approved plan and
as approved by the Village Engineer, except that trees of aesthetic
value located at least five feet from the paved roadway may, with
the approval of the Village Engineer, be required to remain. All rocks
and boulders larger than six inches in diameter shall be excavated
and removed to at least six inches below the finished subgrade of
the roadway. All topsoil or otherwise soft or unstable materials shall
be excavated from within the road area and shall be replaced with
suitable granular soil. Fill required to complete the approved grades
shall be acceptable to the Village Engineer, and unsatisfactory materials
shall be removed from the site by the developer.
C.
Where fills are necessary to complete the required line and grade
or to backfill trenches or other excavation, the materials incorporated
in the work shall be acceptable to the Village Engineer and shall
be placed in layers not exceeding eight inches in depth, each layer
to be thoroughly compacted by rolling with a three-wheel, sheep's-foot,
pneumatic-tired or padded wheel roller or by impact rammer or vibratory
equipment in areas inaccessible to power rollers. All compaction shall
continue until the fills are firm and unyielding. Adequate compaction
shall be at least 95% of Standard AASHTO Optimum Density.
D.
The rough grade of the road pavement, curb and sidewalk areas shall
be completed to within one inch below, but not above, the finished
subgrade, as shown on the approved cross section of the right-of-way
improvement.
E.
Earth shoulders and the flow line of ditches and gutters shall be
maintained in satisfactory condition at the developer's expense at
all times during the course of construction of the subdivision and
until such time as the Village Board has accepted dedication of the
right-of-way.
Every new street shall be constructed as a standard street unless
otherwise designated as a rural road by the Village Planning Board,
all as shown and described hereinbelow. The designation of "commercial
and industrial access" streets will also be made by the Village Planning
Board and will be classified as such in accordance with the expected
nature and level of traffic on the roadway.
A.
Soil erosion and sediment control measures shall be constructed and
maintained by the developer during the entire course of development
of the streets and public easements in accordance with the guidelines
for erosion and sediment control in urban areas of New York State
developed by the United States Department of Agriculture, Natural
Resources Conservation Service.
B.
An erosion and sediment control plan shall be prepared as part of
the construction plans for the streets and easements, showing locations
of proposed diversion berms, sediment basins, silt fences and hay
bale filter traps. All such berms and basins shall be in place prior
to the grading operation and installation of utilities and shall be
maintained until construction is completed and/or the area is stabilized.
Sediment basins shall be cleaned when the trap is 50% full of sediment.
Silt fences shall be erected along the entire length of the working
area, downslope of disturbed areas. Hay bale filters shall be installed
along the downstream perimeter of all earth stockpiles.
C.
Soils to be stockpiled are to be located so as not to obstruct natural
drainage or cause off-site sediment problems. Stockpiled soil will
require a temporary vegetative cover when exposed for a period of
more than one month.
D.
All disturbed areas shall be limed and fertilized to soil test recommendations
such as those offered by the Cornell University Extension Service
prior to both temporary and permanent seeding. Disturbed areas, including
road embankments, shall be maintained in a rough graded condition
and temporarily seeded and/or mulched until proper weather conditions
exist for the establishment of permanent vegetative cover.
E.
All storm drainage inlets are to be temporarily capped and protected
by a filter trap to prevent entry of sediment carried by runoff water
until vegetation and/or paving is established as planned.
F.
Prior to the construction of curbs, diversion berms shall be established
by grading, at one-hundred- to three-hundred-foot intervals, depending
on slope, directing the runoff across the roadways to undisturbed
areas or sediment traps. Diversion berms shall be maintained on a
daily basis after the construction of curbs, and prior to paving;
berms shall be graded and maintained on a daily basis at each catch
basin, directing runoff into the catch basin through a sediment filter.
Easement areas for utility pipes shall have similar berms, which should
remain permanently, if appropriate. Easement areas shall be graded
and stabilized immediately after the installation of pipes and structures.
A.
Storm drains draining areas up to 50 acres shall be designed on the
basis of a twenty-five-year average return frequency of rainfall.
For areas of 51 to 200 acres, a fifty-year storm shall be used, and
for areas greater than 200 acres, a one-hundred-year storm shall be
used. All drainage channels, roadway culverts, piped watercourses
and detention basins shall be designed for the one-hundred-year return
frequency storm flow. The stormwater runoff drain facilities shall
be of the type and size designed and shown on the approved drainage
plan and shall be constructed to the prescribed lines and grades at
the approved locations. The minimum grade of any drainage pipe shall
not be less than 1% unless it can be adequately demonstrated that
a lesser grade is absolutely necessary. In general, pipe slopes shall
be provided to ensure a minimum velocity of 2 1/2 feet per second
when the pipe is flowing 1/2 full. Minimum pipe size shall be 15 inches
in diameter.
B.
The storm drainpipe shall be corrugated metal pipe or reinforced
concrete pipe meeting New York State Department of Transportation
specifications. Concrete pipe shall conform to ASTM A76, Class III,
and shall be furnished with tongue and groove or O-ring joints. Corrugated
metal pipe shall conform to the New York State Department of Transportation
Standard Specifications, Sections 707-02 and 707-13. All piping
shall be installed in accordance with New York State Department of
Transportation Standard Specifications, Section 603, Corrugated metal
pipe shall be galvanized, coated and lined with a bituminous invert.
C.
Catch basins; drain inlets.
(1)
Catch basins. Catch basins or manholes shall be provided at all points
of change of slope or alignment and at all junction points. Catch
basins shall be spaced apart no further than 300 feet. Additional
basins shall be indicated in the design because of the presence of
large volumes of local runoff or for unusual topography.
D.
Concrete headwalls shall be provided at the inlet or outlet of any
storm drain at a drainage channel. The headwall may be straight, L-shaped
or U-shaped, as is most appropriate for the given situation. The shape
of the headwall shall be shown on construction plans, and its details
shall be in accordance with the standard details shown in these specifications
unless conditions warrant a special design, which shall be shown as
part of the construction plans in detail.
E.
Precast concrete or prefabricated metal end sections may be used
where appropriate conditions exist. Depending on flow conditions,
a cutoff wall 2 1/2 feet in depth, anchored to the end section,
may be required.
F.
Riprap or stone fill shall be placed at all headwalls for a sufficient
length and height to adequately provide for transition of ground slopes
and water velocities to prevent erosion. A riprap analysis shall be
provided unless otherwise waived by the Village Engineer.
A.
With the approval of the Village Engineer, open ditches may be used
in lieu of storm drainpipes when the grade of the land traversed is
flat or when it is desirable to drain and dry up the surrounding area.
Such channels shall be designed to adequately transport the one-hundred-year
storm flows while maintaining one foot of freeboard to the top of
bank. All open ditches shall be stabilized with riprap unless a vegetative
stabilization is approved by the Village Engineer.
B.
Open ditches shall be constructed in accordance with the illustration
in these specifications, but in no case shall the grade of an open
ditch exceed 3%. Riprap, when called for, shall consist of fieldstone
or rough, unhewn quarry stones as nearly cubicle in form as possible,
placed upon a slope not steeper than one vertical to two horizontal
and so laid that the weight of the large stones is carried by the
soil and not by the stone adjacent. Except where heavier stone is
indicated by analysis, all stones shall weigh between 50 pounds and
150 pounds each, and at least 60% of them shall weigh more than 100
pounds each. Riprap stones shall be placed over a six-inch bedding
of crushed stone or gravel. The crushed stone or gravel shall be installed
on an approved geotextile filter fabric, which is to be laid on the
faces of the shaped excavation forming the channel bed and side slopes
of the open ditch. The larger stones shall be placed first, roughly
arranged and in close contact. The spaces between the larger stones
shall be filled with spalls of suitable size.
A.
The width of the trench in which the pipe is placed shall be sufficient
to permit thorough tamping of the backfill under the haunches and
around the pipe. Where rock, in either boulder or ledge formation,
is encountered, it shall be removed below grade and replaced with
suitable materials in such a manner as to provide a sand or crushed
stone subgrade cushion having a thickness under the pipe of not less
than eight inches; and where there are excessively heavy fills over
the top of the pipe, the Village Engineer may specify that an earth
cushion up to 1/2 inch in thickness per foot of fill be placed over
the top of the pipe. In no case shall the top of any drainage pipe
be less than 18 inches below the finished grade of the pavement. Where
soft, spongy or other unstable soil is encountered at the grade established,
all such unstable soil under the pipe and for a width of one diameter
on each side of the pipe shall be removed and replaced with run-of-bank
gravel or other acceptable material. In all cases, the bed shall be
thoroughly compacted and shall provide a firm foundation for the pipe.
B.
Pipe shall be laid to true line and grade on the prepared bed of
the trench. All connections for making field joints in corrugated
metal pipe shall consist of corrugated, galvanized metal bands so
constructed as to lay on equal portions of each of the culvert sections
to be connected. All reinforced concrete pipe, bell and spigot joints
shall be filled with portland cement mortar. Mortar fill shall be
applied to the exterior joint only in pipe sections smaller than 48
inches in diameter.
C.
Backfilling of trenches shall be performed in accordance with the paragraph on fills under the heading of "Development of right-of-way." (See § 205-13.)
D.
Any additional drainage facilities not shown on the approved plan
and which may be ordered by the Village Engineer shall be constructed
by the developer at the developer's expense and in accordance with
these specifications.
E.
Drain inlets and manholes shall be constructed in accordance with
the standard drawings in these specifications, utilizing materials
and methods in conformance with current New York State Department
of Transportation Standard Specifications. Particular care shall be
exercised in backfilling around completed structures to obtain maximum
compaction, utilizing mechanical tamping equipment in order to avoid
pavement settlement. Pipes
shall be trimmed flush with inside walls of structures, leaving no
rough edges which would endanger maintenance personnel. Both the interior
and exterior of drain inlets constructed of block shall be parged
with a portland cement mortar.
Where required, excavation and backfilling for underground utility
pipes and cables shall be done in strict conformance with the requirements
outlined above for storm drain construction and as required by the
respective utility companies.
Where there are no sidewalks, shoulders and slopes to complete,
the balance of the right-of-way shall be at least 10 feet wide and
shall be graded to meet the finished elevation of curbs or gutters
on a slope of 1/2 inch per foot for a distance of five feet from the
edge of the curb or gutter and thence on a slope or not more than
one vertical to two horizontal to the limits of the right-of-way,
both in cut and fill. Exceptions to these requirements where rock
or other conditions exist may be approved by the Village Engineer.
On any fill section where the elevation of the shoulder is five feet
or more above that of the toe of slope, the developer shall provide
guide railings on the shoulder as approved by the Village Engineer.
Shoulders and slopes shall be dressed, topsoiled and seeded by the
developer. Seed mixtures shall be as approved by the Village Engineer
and shall be appropriate for the subsurface soil condition, the condition
of available sunlight and provisions for future maintenance of the
vegetation.
All retaining walls with a total vertical retained height projection
exceeding four feet shall be designed as structural members, keyed
into a stable foundation and shall be capable of sustaining the imposed
design loads. Any such retaining wall proposed for construction within
four feet of the property line or within a distance from the property
equal to or less than the retained height of the wall shall be constructed
of a durable material such as concrete or stone.
A.
Before fine grading or construction of curbs and sidewalks is started,
all trenches for the storm sewers and underground utilities, where
required or approved, including those required for the house connections
and hydrants, shall have been thoroughly compacted to the satisfaction
of the Village Engineer.
B.
After completion of the rough grade and prior to the laying of the
foundation course, the subgrade shall be shaped to line and grade
and thoroughly compacted with an approved self-propelled roller weighing
not less than 10 tons. All hollows and depressions which develop under
rolling shall be filled with acceptable granular material and again
rolled, this process to be continued until no depressions develop.
The subgrade shall not be muddy or otherwise unsatisfactory when the
foundation course is laid upon it.
C.
Any soft or unstable portions of the subgrade which develop under
the roller shall be completely excavated and removed from the right-of-way
and shall be replaced with acceptable granular material and the area
regraded and compacted as above.
D.
Fine grade shall conform to the prescribed width of the pavement
and shall extend equidistant from the center line of the road right-of-way
and shall conform to the typical cross section of the road pavement
and to the approved lines and grade.
A.
The completed street pavement shall consist of the following:
B.
The materials and methods of mixing and placing bituminous pavements
shall conform with New York State Department of Transportation Standard
Specifications, as hereinafter referenced.
C.
Pavement shall only be placed on an approved dry subgrade. Before
the paving operations start, the surface temperature must be:
(1)
Forty degrees Fahrenheit if the nominal compacted lift thickness
is three inches or greater.
(2)
Forty-five degrees Fahrenheit if the nominal compacted lift thickness
is greater than one inch but less than three inches.
(3)
Fifty degrees Fahrenheit if the nominal compacted lift thickness
is one inch or less.
D.
The surface of any existing pavement shall be cleaned, joints and
cracks filled and the surface leveled to a uniform grade and cross
slope or crown in areas designated by the Village Engineer prior to
the application of a new bituminous concrete course.
E.
New bituminous overlays shall be of asphalt concrete Type 6, and
shall be of a compacted thickness of not less than 1 1/2 inches.
F.
If, in the Village Engineer's determination, a tack coat of bituminous
material is required over old bituminous pavement prior to placement
of new bituminous mixture, the contractor shall furnish and place
such material. The tack coat shall meet the New York State Specifications,
Section 407, and shall be applied at a minimum rate of 0.1 gallon
per square yard.
G.
Unless otherwise directed by the Village Engineer, paving operations
shall be halted if adverse weather conditions occur.
H.
The mixture shall be transported from the mixing plants to the work
site in tight vehicles having clean smooth metal beds. Each load shall
be covered with canvas or other suitable materials of such size as
to protect the mixture from the weather. The inside surface of the
vehicles used for the transportation of plant mixes shall be lightly
coated, just before the vehicles are loaded, with either a whitewash
of lime and water, soap solution or detergents or fuel oil applied
by a high-pressure fog system, as approved by the Village Engineer.
After application, the truck bodies shall be raised for a sufficient
period to allow the excess fluid to drain.
I.
The asphalt shall be placed at the temperatures shown on the Composition
of Bituminous Plant Mixtures Table of the New York State Department
of Transportation Standard Specifications.
J.
Bituminous pavers.
(1)
Bituminous pavers shall be self-powered units, provided with an activated
screed or strike-off assembly. The machine shall be capable of spreading
and finishing courses of bituminous plant mix material in lane widths
applicable to the specified typical section and thicknesses shown
on the plans. The paver shall have a receiving hopper with sufficient
capacity for a uniform spreading operation and with automatic flow
controls to place the mixture uniformly in front of the screed. The
screed or strike-off assembly shall be heated as necessary to produce
a finished surface of the required evenness and texture without tearing,
shoving or gouging the mixture. When laying mixtures, the paver shall
be capable of operating at forward speeds consistent with satisfactory
placement of the mixtures.
(2)
The bituminous paver shall be at the job site sufficiently ahead
of the start of paving operations to be examined and approved of by
the Village Engineer. Any paver found worn or defective either before
or during its use shall be immediately repaired to the satisfaction
of the Village Engineer, or replaced.
(3)
Approved bituminous pavers shall be used to distribute the mixture
either over the entire width or over such partial width as may be
practicable. Placing of the mixture shall be continuous at a desired
rate of not less than 50 tons per hour. The Village Engineer may permit
a lesser rate if satisfactory results are achieved. Upon arrival at
the site, the mixture shall be dumped into the paver and immediately
spread and struck off to the width required and to such appropriate
loose depth that, when the work is completed, the required compacted
thickness will be obtained.
K.
In areas too small or inaccessible to a paver, the course may be
spread by hand methods, as directed by the Village Engineer.
L.
Binder and top courses shall be placed in such a manner as to overlap
the joints formed by two paving passes being made side by side in
the preceding course.
M.
Immediately after the bituminous mixture has been spread, struck
off and surface irregularities adjusted, it shall be thoroughly and
uniformly compacted by rolling. All courses shall be initially rolled
with the roller traveling parallel to the center line of the pavement,
beginning from the outside edge towards the roadway's center line.
N.
Rollers shall move at a slow and uniform speed. Any displacement
occurring as a result of the reversing of the direction of a roller
or from other causes shall be corrected at once by the use of rakes
and addition of fresh mixture as required. To prevent adhesion of
the mixture to the rollers, the wheels shall be kept properly moistened
with water or water mixed with small quantities of detergent or other
approved materials, but in no case shall a solvent be used which will
have an effect upon the bituminous pavement. Suitable means shall
be provided to keep pavers and other equipment and tools free from
bituminous accumulations. The surface of the pavement shall be protected
from drippings of oil, kerosene or other materials used in paving
and cleaning operations.
O.
Compacting methods.
(1)
The contractor may use either of the following methods, at his election,
for compacting bituminous mixtures:
(a)
The contractor may use a vibratory roller for compaction. This
roller must make a minimum of two vibrating passes and two static
passes and operate at a uniform speed that does not exceed 2 1/2
miles per hour (200 feet per minute).
(b)
The contractor may use a ten-ton tandem roller for compaction.
The number of passes will be as directed by the Village Engineer.
(2)
An alternative method may be proposed by the contractor but may be
used only if approved by the Village Engineer.
P.
Any mixture that becomes loose and broken, mixed with dirt, too hot
or cold, or is in any way defective shall be removed and replaced
with fresh hot mixture. This replacement material shall be compacted
to conform with the surrounding areas. Any area showing an excess
or deficiency of bituminous materials shall be corrected to the satisfaction
of the Village Engineer.
Q.
The thickness of pavement may not vary more than 1/4 inch for any
type of mixture less than four inches thick. Any type of mixture four
inches or more in thickness shall not exceed a tolerance of 1/2 inch.
The surface of any mixture shall not vary more than 1/4 inch from
the proposed pavement height, and no depressions or "birdbaths" will
be permitted in the final wear course.
R.
Any joint in a pavement layer shall be formed in such a manner as
to expose the full depth of the course for the next run. Whenever
existing pavement edges have become ragged, they shall be scored and
cleared so that there is a neat straight vertical edge.
S.
Along forms, curbs, headers, walls and other areas not accessible
to the rollers, a hand tamper or any other device approved by the
Village Engineer may be used to compact the pavement material.
T.
On depressed areas (trenches, etc.), a trench roller or small vibratory
roller or any other method approved by the Village Engineer may be
used to compact new pavement.
U.
Delivery tickets showing the date, name of producer, name of project,
type of mix and weight of delivered material are to be supplied to
the Village Engineer for all asphalt concrete installed on a particular
project.
V.
All manholes, valve covers, etc., are to be carefully adjusted to
final grade and adequately covered prior to final paving to prevent
clogging or burial by the final course.
A.
Portland cement concrete curbs shall be constructed on both sides
of the street to the dimensions and specifications shown on the standard
detail. Minimum compressive strength of the concrete shall be 4,000
pounds per square inch in 28 days. Concrete shall be finished and
cured to the satisfaction of the Village Engineer in accordance with
the general specifications for concrete found elsewhere in these specifications.
The use of stone curbing will be subject to the approval of the Village
Planning Board. Stone curbing must be bedded in a concrete base, all
as shown on the following details.
B.
The developer shall, at his own expense, replace any curbing which
proves defective or which is damaged by his operations before the
road is dedicated to the Village.
A.
Sidewalks shall be four-inch-thick reinforced portland cement concrete
sidewalks at a minimum width of four feet. Sidewalks shall be placed
on a four-inch (compacted thickness) base of three-eighths-inch to
three-fourths-inch size crushed stone, washed gravel, washed coarse
sand or select granular fill. Prior to placement of the base stone,
the subgrade shall be thoroughly compacted with a roller or vibratory
compactor of the largest size practicable, to the satisfaction of
the Village Engineer. Particular attention shall be paid to compaction
over utility trenches. Roots, stumps, stones over six inches in diameter
and soft or wet earth are not permitted in the subgrade within two
feet of the concrete flatwork.
B.
One-inch-deep construction joints having one-fourth-inch radius edges
shall be placed at four-foot intervals in the sidewalk. Expansion
joints of one-fourth-inch cellulose or similar material shall be placed
at twenty-foot intervals. Edges shall have a one-fourth-inch radius.
C.
Concrete slabs in driveway ramps and aprons and in sidewalks under
driveways shall be six inches thick. Driveway ramps shall have a steel
reinforcing consisting of six-by-six to 6/6 welded wire mesh placed
at the mid-depth of the slab.
D.
Concrete in sidewalks shall have a minimum compressive strength after
28 days of 4,000 pounds per square inch and shall be placed in accordance
with the general specifications for concrete found elsewhere in these
specifications.
B.
Concrete properties.
(1)
All concrete shall have a minimum cement factor of 705 pounds (7.5
sacks) per cubic yard and shall attain a minimum compressive strength
of 4,500 pounds per square inch at 28 days. All concrete shall be
air-entrained and the air content shall be 5.5%, plus or minus 1%.
(2)
The concrete shall be placed at a maximum slump of four inches.
(3)
Discharge of the concrete shall be completed within 1 1/2 hours
after the introduction of the mixing water to the cement and aggregate
or the introduction of the cement to the aggregates.
C.
Placing and curing concrete.
(1)
Water is to be removed from excavations.
(2)
Forms shall be coated with an approved form oil.
(3)
Thoroughly pre-dampen all subsoil before placing concrete.
(4)
Deposit concrete as close as possible to its final position, to avoid
segregation.
(5)
All concrete shall be consolidated by internal vibration or spading
and rodding.
(6)
Upon removal of forms and/or final finishing, all concrete curbing,
gutters and sidewalks shall be sprayed with one coat of curing compound
and covered with damp burlap for a minimum of 72 hours. The contractor
shall submit samples and manufacturer's specifications for approval
of compound. Compound shall be delivered in containers with seals
unbroken and stored in a dry place. Curing compound shall conform
to Type 1-D liquid compound with a fugitive dye conforming to ASTM
C-309 and shall be applied at manufacturer's recommended rates. Where
approved by the Village Engineer, curing may be obtained with a plastic
sheet membrane, suitably protected from dislodgement.
(7)
The placement of concrete for curbs and sidewalks shall be prohibited
between October 1 and April 1 each year unless specifically permitted
by the Village Engineer. When permitted, concrete for curbs and sidewalks
placed between October 1 and April 1 should not be subjected to deicing
salts for a period of at least six months. When, in the opinion of
the Village Engineer, the use of deicing salts cannot be avoided within
the next three months, the concrete should be protected by an additional
application of curing compound or other sealer to seal the surface
as thoroughly as possible against the penetration of salt brine during
the period of recurrent freeze-thaw cycles.
(8)
Concrete placed during cold weather must be heated to minimum of
60° F., when air temperature is 40° F. and falling, and protected
for 72 hours at 50° F. to prevent freezing. No concrete shall
be placed on a frozen base, and the provisions of the American Concrete
Institute Standard ACI 318 shall be strictly followed for cold-weather
placement of concrete and the American Concrete Institute ACI Standard
306.
(9)
Final finishing must be delayed until water sheen has disappeared
from the surface. Do not work bleed water into the surface; do not
dust with cement to absorb the excess surface water; do not add water
to the surface or overwork the surface. Brooming should be delayed
until the concrete surface has stiffened sufficiently to permit the
desired texturing.
(10)
Finished concrete shall be sealed after curing by applying two
coats of boiled linseed oil, thinned with mineral spirits. The concrete
surface must be completely dry before application. It is recommended
that the first coat be applied 90 days after the pour and the second
coat one year after the pour.
A.
After the wearing course of the roadway pavement has been placed,
monuments shall be installed along the road right-of-way line at every
point of curvature and point of tangency on both sides of the roadway.
The monumentation of the right-of-way shall be in addition to the
monuments required to be installed at all property corners within
a subdivision. At least one monument shall also be provided for every
parcel along the street right-of-way, as further described in the
Village Subdivision Ordinance.[1]
[1]
Editor's Note: The Village's Subdivision and Site Plan Regulations
are on file in the Village Clerk's office.
B.
Property corners shall be staked with an iron pipe or steel pin at
least 18 inches in length. Monuments for the right-of-way shall be
either a twenty-four-inch-long precast concrete post with embedded
iron pin or a twenty-four-inch-long, three-fourths-inch-diameter steel
pin with a two-inch-diameter brass or aluminum cap securely anchored
to the top of the pin.
C.
Reference ties from at least three permanent locations (house corners,
preferably) shall be recorded for all right-of-way monuments. The
surveyor shall prepare a certified map showing the locations of the
monuments and reference ties and shall file two copies with the Village
Engineer.
Upon completion of the public improvements, the surveyor shall
prepare a survey map of the street(s), showing as-built elevations
of the street center line; top-of-grate casting and invert elevations
of all storm drains; sizes, locations and types of pipes; locations
and sizes of any underdrains and locations and grades of open channels.
The surveyor shall obtain record information on all underground utilities,
including electricity, telephone, gas, water and sewer connections,
and show the locations of these utilities, with due notice concerning
those which are not the result of the surveyor's own field locations.
Two sets of these drawings shall be filed with the Village Engineer.
Forty-eight hours' (minimum) notice shall be given to the Village
Engineer before any work covered under these specifications commences.
Where grade sheets are required, one copy shall be delivered to the
Engineer at least 48 hours before work commences.
A.
Piping. Water mains shall be ductile iron pipes, Thickness Class
51, except that pipe with flanged ends or grooved for mechanical couplings
shall be Thickness Class 53. All pipe shall be cement-lined and bituminous-coated
in accordance with ANSI A21.4 and shall be protected in conformance
with ANSI A21.51. The piping lengths shall be furnished with push-on
compressible ring-type joints; however, fittings and ells shall be
furnished with mechanical joint ends conforming to ANSI A21.11. Anchorage
of pipe bends, ells and fittings shall be with the use of mechanically-anchored
retainer glands (AWWA A21.11) in addition to concrete thrust blocks
and shall be adequate for the imposed loads and as approved by the
Village Engineer. All piping shall be installed in strict accordance
with AWWA C600. Piping shall be cleaned, tested and disinfected, in
accordance with AWWA C601.
B.
Valves. Valves shall be installed at all connections to existing
water mains, at street intersections and at a maximum spacing of 400
feet. Valves shall be mechanical joints, iron body, bronze-mounted,
double disc, parallel seat, nonrising stem gate valves with an O-ring
stuffing box, conforming to AWWA C500 and suitable for a working sliding
type, cast iron with cover embossed with a "water" designation. All
buried valve and valve boxes shall be coated with a heavy-coat tar
enamel.
C.
Service lines.
(1)
All service lines shall be complete with curb stops, Mueller Cat.
No. H15210 or equal; curb boxes, Mueller Cat Nos. H1-0350 and H-10346;
and corporation stops, Mueller Cat. No. 1500, or approved equals.
Corporation stops shall be bronze with tapered threads.
(2)
Corporation stops of any size placed into existing mains shall only
be installed using an approved tapping saddle. Corporation stops over
one inch in size and installed into the new mains shall also employ
a tapping saddle.
(3)
Water service pipe shall be ASTM B88, Type K, copper water tubing
using flare-type brass fittings, and sweated fitting, where permitted,
shall be installed with lead-free solders. Single-family residential
unit service lines shall be a minimum diameter of 3/4 inch, except
that a one-inch service line shall be required on residences over
80 feet from the main.
A.
In general, the Village water mains shall be laid in the center of
one of the two roadway lanes, thereby preserving the roadway center
line for future sewer main construction. Unless otherwise approved,
the mains shall be installed in the northerly and westerly lanes.
All water mains shall be laid within a Village street, right-of-way
or easement.
B.
The minimum main size for any residential, commercial, institutional
or industrial district or area shall be eight inches. All pipe sizes
larger than eight inches shall be approved by the Village Engineer.
Wherever possible, water mains shall be looped to establish a grid
pattern within any new developed area.
Hydrant service shall be installed in accordance with the following
standards:
A.
For residential districts, hydrants shall be spaced not more than
500 feet apart.
B.
For commercial districts, hydrants shall be spaced not more than
300 feet apart.
C.
All hydrant locations shall be designated by the Village Fire Department.
D.
Hydrants within the Village have been standardized to the Mueller
Company Centurion with breakaway shoe. Hydrants shall conform to AWWA
C502 and shall be furnished with two two-and-one-half-inch hose connections
and one four-and-one-half-inch steamer nozzle connection. Threading
of connections shall conform to the Fire Department standards, and
hydrants shall open counterclockwise.
E.
Hydrant connections shall be made with anchoring glands and thrust
blocks. A gravel drain shall be provided at all drain ports.
A.
Piping shall be installed in strict conformance with the manufacturer's
recommendations. All piping shall have a minimum soil cover of four
feet and a maximum depth below the finished grade of five feet unless
otherwise approved by the Village Engineer.
B.
Any pipe exhibiting cracks, chips or other defects shall be replaced
with sound pipe sections. Defective coatings shall be repaired before
pipe installation. The cutting of pipe sections shall be done in a
neat and workmanlike manner, without damaging the pipe or lining.
C.
The trench base shall be graded to the required elevation and shall
provide a continuous and uniform bearing for the pipe sections and
fittings. Any soft or unsuitable subgrade material shall be removed
and replaced with an approved crushed stone or gravel. Backfill shall
contain no frozen materials, rubbish or organic materials. No rock
or stone larger than two inches in diameter shall be permitted within
two feet of the pipe location. All backfill shall be an approved granular
material and shall be well tamped and compacted under the pipe haunches
and around the pipe to a minimum depth of two feet above the pipe.
The compaction of this material shall be at least that specified hereinabove
for the roadway excavation and backfill.
D.
Tees, bends and plugs shall be restrained against movement with both
retainer glands and thrust blocks, as approved. Friction bands and
harnessed tie rods may be used in combination with the thrust blocks,
where approved by the Village Engineer.
E.
When permitted, dead ends of piping runs shall be installed with
a gate valve blowoff constructed within an approved chamber. Manually
operated air vents employing a three-fourths-inch service tap complete
with a copper-tubing connection to a separate curb stop and box shall
be installed at all high points in the main.
F.
The entire line shall be pressure-tested for leakage. After venting
all air from the line, the piping shall be pressurized to 250 pounds
per square inch and this pressure maintained for one hour unless otherwise
directed by the Village Engineer to extend the test period. An accurate
record shall be kept of any required makeup water necessary to maintain
the specified test pressure. If the pressure cannot be held within
reasonable limits, the main shall be uncovered to inspect for unsatisfactory
joints or defective pipes or fittings. After making the necessary
repairs, the pressure test shall be repeated until a satisfactory
result is obtained. The maximum permissible leakage of the pipe as
measured against the above-described makeup water required during
testing shall be computed by the following formula, L = N x D x P/7400,
where L equals the allowable leakage in gallons per hour, N equals
the number of joints in the test, D equals the nominal diameter of
the pipe in inches, and P equals the average test pressure (psig).
The test location shall be at the low point of the installed pipe
section.
Piping shall be kept clean during construction using temporary
bulkheads and covers at the end of each day's work. The installed
line shall be disinfected in accordance with AWWA Standard C-601,
but the pipeline shall be chlorinated for a minimum of 24 hours. After
flushing of the mains, samples shall be taken and analyzed as required
by the Rockland County Health Department. All disinfection procedures
shall be witnessed by the Village Engineer.
A.
The Village Board hereby delegates to the Planning Board of the Village
of Hillburn the right to modify or vary the requirements of this article.
Such modification or variance may be granted in an individual case-by-case
basis by the Planning Board upon application to the Planning Board
when, in the judgment of the Planning Board, the public convenience
and welfare will be substantially served and it may, in appropriate
and specific cases, subject to the appropriate conditions and safeguards,
determine and vary the application of regulations of this article
in harmony with its general purposes and intent.
