[Amended 12-21-1973; 7-31-1974; 7-29-1977 by L.L. No. 6-1977; 4-16-1982 by L.L. No. 1-1982; 6-17-1983 by L.L. No. 2-1983; 7-31-1989 by L.L. No. 18-1989; 7-31-1989 by L.L. No. 19-1989; 10-2-1991 by L.L. No. 14-1991; 2-17-2006 by L.L. No. 8-2006; 4-20-2007 by L.L. No. 3-2007; 7-21-2007 by L.L. No. 13-2007]
For the purpose of these regulations, certain
words used herein are defined as follows:
BOARD
The Planning Board of the Incorporated Village of East Hampton.
BOND
A.
PERFORMANCE BONDAn undertaking secured by acceptable surety furnished by the applicant to guarantee that the applicant constructs, causes to be constructed and/or provides all improvements required by the Board as conditions of approval of the application.
B.
MAINTENANCE BONDAn undertaking secured by acceptable surety furnished by the applicant to guarantee upkeep and the workmanship and materials of all required improvements for a period of one year from the date of release of the performance bond by the Village.
CONDITIONAL APPROVAL OF A FINAL PLAT
Approval by the Planning Board of a final plat subject to
conditions set forth by the Planning Board in its resolution conditionally
approving the plat. Such conditional approval does not qualify a
final plat for recording nor authorize issuance of any building permits
prior to the signing of the plat by a duly authorized officer of the
Planning Board and recording of the plat in the Office of the County
Clerk.
FINAL PLAT
A drawing prepared in accordance with the requirements of
this chapter that shows a proposed subdivision, containing all information
required to be shown on a preliminary plat and modifications, if any,
required by the Planning Board at the time of the approval of the
preliminary plat.
FINAL PLAT APPROVAL
The signing of a plat in final form by a duly authorized
officer of the Planning Board pursuant to a Planning Board resolution
granting final approval to the plat or after conditions specified
in a resolution granting conditional approval of the plat are completed.
Such final approval qualifies the plat for recording in the Office
of the County Clerk.
LOT
A parcel of land containing a building envelope.
OFFICIAL MAP
The map established by the Village Board of Trustees under
§ 7-724 of the Village Law, showing the streets, highways
and parks theretofore laid out, adopted and established by law and
any amendments thereto adopted by the Village Board or additions thereto
resulting from the approval of subdivision plats by the Planning Board
and the subsequent filing of such amendments and approved plats.
PLAT
An accurate and complete survey of all lots; streets; natural,
man-made and cultural features; reserved areas; easements; and boundaries
within a subdivision.
PRELIMINARY PLAT
The preliminary drawings indicating the proposed layout of
the subdivision and pertinent data on surrounding property submitted
to the Planning Board.
PRELIMINARY PLAT APPROVAL
Approval of the layout of a proposed subdivision as set forth
in a preliminary plat but subject to the approval of the plat in final
form in accordance with the provisions of this chapter.
PRESERVATION
The protection of natural and man-made features, resources
or systems and cultural features in their natural or existing condition
for restrictive and nonconsumptive use.
SERVICEWAYS and DRIVEWAYS
Minor ways which are used primarily for vehicular service
access to properties otherwise abutting on a street, and shall be
designated as "serviceways" or "driveways" and not as streets.
STREET
A way for vehicular traffic, whether designated as a street,
highway, thoroughfare, parkway, throughway, road, avenue, boulevard,
lane, place or however otherwise designated.
B.
COLLECTOR OR FEEDER STREETSThose which carry traffic from minor streets to the major system of arterial streets and highways, including the principal entrance streets of a residential development and streets intended for commercial frontage.
C.
MINOR STREETSThose which are used primarily for access to the abutting residential properties.
D.
HALF-STREETSStreets, the center line of which coincides with the boundary of the tract to be subdivided.
SUBDIVISION
The division of any parcel of land into two or more lots,
blocks or sites, with or without streets or highways, including resubdivisions
(a change in a map of an approved or recorded subdivision plat) and
any transfer of property where there is any redrawing or alteration
of lot lines or dimensions of any lots or sites shown on described
property.
SUBDIVISION, MAJOR
All subdivisions not classified as minor subdivisions, including
but not limited to subdivisions of five or more lots, or any size
subdivision requiring any new street or the creation of any public
improvements.
SUBDIVISION, MINOR
Any subdivision containing not more than four lots not involving
any new street or road or the extension of municipal facilities or
the creation of any public improvements and not adversely affecting
the remainder of the parcel or adjoining property and not in conflict
with any provision or portion of the Comprehensive Plan or Zoning
Law or this chapter.
Specifications for the final road and drainage
plans include detailed plans of all stormwater drainage facilities,
street plans and profiles. These plans are an integral part of the
final submission and are the basis for the performance bond estimate
and inspection fee. The final road and drainage plans shall be prepared
by a licensed professional engineer and shall conform to the following
requirements:
A. The drawing.
(1) Size shall be 22 inches by 34 inches.
(2) Scale shall be a minimum of one inch equals 100 feet
for the plan. Scale shall be one inch equals 40 feet horizontal and
one inch equals four feet vertical for the profile.
(3) Material shall be ink on linen.
B. Title block and notations.
(3) Name, address, license number and seal of professional
engineer who prepared the drawings.
C. The plan.
(2) Manholes.
(a)
Numbered in accordance with design calculations.
(b)
Type referred to Standard Details, Street Number
1.
(3) Catch basins.
(a)
Numbered in accordance with design calculations.
(b)
Type referred to Standard Details, Sheet Number
1.
(6) Special structures. (scale: 3/8 inch equals one foot
zero inches minimum).
(7) Seepage pools.
(a)
Type referred to Standard Details, Sheet Number
2.
D. The profile.
(1) Existing and proposed grades.
(2) Stationing to conform to plan.
(4) Drainage pipe and structures.
E. Design calculations. Final design calculations shall
be submitted on sheets 8 1/2 inches by 11 inches in a form acceptable
to the Village Engineer and signed by the developer's engineer.
The following criteria shall be the basis for
the design of all streets and stormwater collection systems:
A. Streets. All streets and highways shall be designed
in accordance with the following minimum standards:
(1) Street widths.
|
Type of Street
|
Right-of-Way Width
(feet)
|
Paved Width
(feet)
|
---|
|
Collector
|
66
|
24
|
|
Minor
|
50
|
20
|
|
Lane
|
30
|
18
|
(2) Horizontal alignment.
(a)
The minimum center-line radius of any street
curvature shall be 125 feet for minor streets and 200 feet for collector
streets.
(b)
The minimum tangent distance between reverse
curves shall be 50 feet.
(c)
Property line radii at street corners shall
be not less than 25 feet.
(3) Vertical alignment.
(a)
Gradients of all streets shall conform as much
as possible to the natural terrain but shall not be more than 10%
nor less than 0.50%.
(b)
All changes in grade of more than 1% shall be
connected with a vertical curve.
(c)
The length (L) in feet of a vertical curve shall
be related to the algebraic difference in the percent of grade (A)
and a constant (K = 28 for minor streets and K = 50 for collector
streets) according to the following formula:
|
L = KA
|
|
This formula shall be used for both sag and
crest vertical curves.
|
(d)
Road gradients approaching intersections shall
not exceed 3% commencing at a point at least 50 feet from the nearest
intersecting right-of-way line measured along the center line of the
road.
(4) Intersections.
(a)
Four-cornered intersections shall be avoided
wherever possible, and the angle of intersection of all streets shall
be as near 90º as possible.
(b)
The intersection of minor streets leading into
collector streets shall be separated by a minimum distance of 125
feet between center lines.
(5) Cul-de-sac streets. Dead-end or cul-de-sac streets
are generally not desirable unless it can be known to the Planning
Board that through traffic on such streets is not essential to the
street system. Cul-de-sac streets shall not exceed 2,400 feet nor
service more than 24 lots and shall terminate in a circular turnaround
having a minimum right-of-way radius of 50 feet and a minimum paved
radius of 35 feet.
[Amended 7-31-1989 by L.L. No. 15-1989; 7-31-1989 by L.L. No. 16-1989]
(6) Tap streets. Tap streets shall be provided in order
to provide access to adjacent undeveloped properties as well as to
enhance circulation and emergency vehicular access as deemed necessary
by the Planning Board.
[Added 7-31-1989 by L.L. No. 17, 1989]
B. Stormwater collection systems. All stormwater collection
systems shall be designed in accordance with the following minimum
standards:
(1) Formulas.
(a)
The collection system shall be designed in accordance
with the rational method of design, using the formula:
|
|
Q
|
=
|
Air
|
|
Where
|
|
|
Q
|
=
|
Discharge in cubic feet per second.
|
|
|
A
|
=
|
Tributary drainage area in acres.
|
|
|
i
|
=
|
Coefficient of runoff of the drainage area.
|
|
The following minimum values of "i" shall be
used:
|
|
Residential Zone
|
Hilly Terrain
|
Flat Terrain
|
---|
|
AA
|
.20
|
.15
|
|
A
|
.24
|
.18
|
|
B
|
.28
|
.22
|
|
C
|
.34
|
.26
|
(b)
"R," the rainfall intensity in inches per hour,
shall be determined by the following formula:
|
R
|
=
|
120
t + 20
|
|
|
Where
|
|
|
t
|
=
|
Time of concentration in minutes.
|
(c)
Pipes, conduits or ditches shall be designed
by the use of the Manning formula:
|
|
V
|
=
|
1.486 x R2/3 x 5 1/2
n
|
|
|
|
|
|
|
Where
|
|
|
V
|
=
|
Velocity in feet per second.
|
|
|
R
|
=
|
Hydraulic radius in feet.
|
|
|
n
|
=
|
0.015 for reinforced concrete pipe 18 inches
in diameter or less.
|
|
|
n
|
=
|
0.013 for reinforced concrete pipe larger than
18 inches in diameter.
|
|
|
N
|
=
|
0.025 for earth ditches.
|
|
|
n
|
=
|
0.013 for paved ditches.
|
|
|
S
|
=
|
Slope in feet/feet.
|
|
|
Design velocities shall be limited to three
feet per second minimum and 15 feet per second maximum.
|
(2) Installation.
(a)
Manholes. The maximum distance between manholes
shall be 350 feet. Manholes shall be provided wherever branches are
connected, pipe sizes are changed or there are changes in pipe alignment
or pipe gradients.
(b)
Catch basins. No more than two catch basins
shall be interconnected before being connected to a manhole.
(c)
Piping. Pipelines shall be laid on accurate
grade and in a straight line between manholes. Pipelines shall be
placed as nearly as possible on the center line of the road.
(3) Seepage pools.
[Amended 7-31-1989 by L.L. No. 20-1989; 7-31-1989 by LL. No. 21-1989]
(a)
Storage capacity. Seepage pools shall provide
a storage capacity of 100% of the computed runoff based upon a two-inch
rainfall.