All required subdivision improvements shall be constructed in accordance
with the standards hereinafter specified and in accordance with applicable
ordinances and standard specifications of the Town of Branford.
Construction of all required improvements shall be carried out under
the supervision of the Town Engineer and shall be subject to inspection and
approval by the Commission and the Town Engineer or their authorized agent.
The Town Engineer or his agent shall be notified when any preliminary grading
of streets has been completed and upon completion of subgrade preparation
and shall be notified at least 48 hours prior to installation of the gravel
subbase course and any base and surface course. No pipe, catch basin, manhole
or other structure shall be backfilled until inspected and approved by the
Town Engineer or his agent. The Commission and Town Engineer or their authorized
agent shall have free access to the construction work at all times and shall
be authorized to take material samples, cores and other tests as deemed necessary
to determine compliance with these regulations. The Commission or the Town
Engineer may require the applicant, at his own expense, to have such tests
made and certified by a professional engineer licensed to practice in the
State of Connecticut.
Streets shall be constructed in accordance with the following standards:
A.
Cross section. Pavements shall be constructed with a crown with a cross slope of 1/4 inch per foot. A ten-foot sidewalk area shall be provided and graded on each side of pavement. The sidewalk area shall be graded level with the top of the curb and shall be loamed and seeded as provided in Subsection G. The Commission or the Town Engineer may require modification of this grading requirement in order to preserve substantial existing trees.
B.
Preparation of subgrade. All trees and roots shall be
stripped to below the base course of the pavement and for the full width of
the pavement. All soft spots, peat, loam, organic material, soft clay, spongy
soil, boulders, ledge and other unsuitable material shall be removed and replaced
by material approved by the Town Engineer. All fill that is placed to an elevation
of less than three feet above the water table at the time of filling shall
consist of rock or free-draining soil meeting State Highway Department specifications.
Where ledge rock is encountered, it shall be removed to a depth of one foot
below subgrade and the area backfilled with gravel. Embankments shall be constructed
of suitable fill material deposited in successive layers not exceeding 12
inches in depth. The subgrade shall be compacted by distributing the hauling
over the area by the use of tread-type of equipment, by power rollers of at
least 10 tons or by other mechanical means approved by the Town Engineer.
F.
Underdrains. The Town Engineer may require the installation
of underdrains beneath the street pavement where necessary to protect the
stability of the pavement.
G.
Slopes. Cut or fill sections beyond the sidewalk area
shall not exceed a slope of one on two except in rock. The Town Engineer may
require a decrease in the amount of slope to whatever extent is necessary
to maintain the stability of the bank under the particular soil conditions.
All earth surfaces of slopes, and areas that have been disturbed in any way
due to grading and construction of the streets, shall be covered with a minimum
of four inches of topsoil and suitably seeded or planted to prevent soil erosion.
The Town Engineer may require the removal or lowering of embankments adjacent
to street intersections in order to assure adequate sight distance at the
intersection. No cut or fill sections beyond the sidewalk area shall extend
into property outside the subdivision or property not owned by the applicant
unless appropriate slope rights are obtained for the Town; in the absence
of such slope rights, appropriate retaining walls shall be constructed within
the subdivision to prevent encroachment upon adjoining property.
H.
Construction procedures. Line and grade stakes shall
not be spaced more than 50 feet apart and shall be set by the land surveyor
or engineer and maintained in good order during construction and until the
street is approved by the Town Engineer. No street shall be opened or used
for travel until it shall have been approved by the Town Engineer. All water
mains, sewers, pipe and other underground utility services shall be installed
prior to placing the base course. Whenever possible, underground utility lines
shall be installed outside the pavement portion of the street.
I.
Debris and equipment. All large rocks, boulders, felled
trees, stumps and brush shall be removed from the street right-of-way. All
temporary structures, tools, equipment and waste materials shall be removed
from the street right-of-way upon completion of the work.
Storm drainage shall be constructed in accordance with the following
standards:
A.
Pipe. All pipe shall meet State Highway Department specifications.
Reinforced concrete pipe shall be used for surface drainage stormwater systems
and cross culverts. Where vertical clearance is limited and on grades in excess
of 10% or where uneven support may be expected, A.C.C.M. pipe or pipe arches
shall be used. All pipe shall be bedded carefully on soil approved by the
Town Engineer. There shall be a four-inch sand cushion bedded under the pipe
on any rock or ledge formation.
B.
Ditches. All open drainage ditches, except stream relocations
or improvements, shall have a minimum depth of 12 inches, a maximum depth
of three feet and maximum side slope of one on 1 1/2. If required by
the Commission or the Town Engineer, ditches shall be paved either with two
inches of hot bituminous concrete, thoroughly compacted on an eight-inch gravel
base or with 1/3 sections of reinforced concrete pipe. All ditches shall be
constructed as approved by the Town Engineer.
C.
Joints. The joints of all pipe shall be shoved tight.
Pipe laid in sandy, silty or other soil in which, in the judgment of the Town
Engineer, there is danger of washing or cave-ins shall have joints thoroughly
sealed with one-to-three concrete mortar.
D.
Catchbasins and manholes. Catch basin and manhole types
shall be approved by the Town Engineer and constructed in conformity with
Connecticut State Highway Standard Specifications. Catch basins may be depressed
slightly to facilitate the collection of water.
E.
Backfill. Where the drainage pipe is necessary to serve
as an underdrain for the street or to control the water table, the pipe shall
be bedded on at least six inches of one-inch washed stone; three-fourths-inch
washed stone shall be placed around and over the pipe to a height of six inches
and then covered by heavy tar paper and backfilled with bank-run gravel. Backfill
for all other pipe shall be tamped pneumatically every 12 inches in even layers.
F.
Construction procedure. All pipe shall be laid to line
and grade as shown on approved drainage plans and profiles. Line and grade
stakes shall be set by a land surveyor or engineer and shall be maintained
in good order until the work has been inspected and approved by the Town Engineer.
Four batter boards (three sections) shall be maintained in place at all times
when laying pipe and shall not be spaced more than 30 feet apart. The exact
grade for each pipe shall be maintained. No pipe shall be laid on water, and
water shall not be permitted to rise over freshly mortared joints until they
are properly hardened. Ground or surface water accumulating in the trench
must be pumped out.
Reinforced concrete monuments shall be built of one-two-four mix, four
inches square on the bottom and three feet long. Each monument shall be suitably
marked on the top and shall be set so that the marked center of the top shall
be the point of reference. The tops of such monuments shall be set in place
after all other street development is completed. The accuracy of location
of such monuments shall be certified in writing by the land surveyor making
the record subdivision map.
Guard posts or guide railing shall be installed at all drainage headwalls
in the right-of-way and along all streets where there will be an embankment
with a depth of four feet or more within 20 feet of the proposed pavement.
Creosoted or cedar guard posts shall be spaced six feet on center and shall
have a minimum tip diameter of five inches and a minimum length of seven feet
with 3 1/2 feet set in the ground. Subject to the approval of the Town
Engineer, three-cable guide railing, metal-beam-type guide railing or steel
guard posts of suitable design may be substituted for the creosoted or cedar
guard posts. All materials and construction methods and details shall be subject
to the approval of the Town Engineer.
Sidewalks shall have a minimum width of four feet and be located within
the street lines with one edge abutting the property line or in such other
location approved by the Commission or the Town Engineer. Sidewalks shall
be constructed in accordance with Town specifications.[1]
Street name signs shall be installed at all street intersections in
locations approved by the Town Engineer. Such signs shall be of a design and
material used by the Town of Branford.
