The preliminary plat shall be prepared by a
licensed land surveyor and shall show the information noted in this
section.
A. Size and type of drawing.
(1) Sheet size shall be either 18 inches by 20 inches
or 36 inches by 20 inches.
(2) The original drawing may be done with pencil on vellum
tracing paper, with scaled dimensions and careful lettering, using
uppercase letters at a minimum height of 1/8 inch.
(3) The scale of the drawing shall be not more than 100
feet to the inch and shall be a common engineering scale.
B. Title block.
(1) Name of the proposed subdivision.
(2) Location by postal district.
(3) Name and address of the subdivider.
(4) Name, address, license number and seal of the licensed
land surveyor preparing the drawings.
(5) Total acreage of the entire tract.
(6) Total number of the proposed lots and zoning district.
(7) The term "preliminary plat" must show on the map.
C. Other notations.
(1) Date of the original preparation and of each subsequent
revision.
(3) Certification by the licensed land surveyor that the
topography shown resulted from an actual survey, and the date of that
survey.
D. Key map at a scale of 600 feet to the inch.
(1) Proposed subdivision streets.
(2) Surrounding streets, existing and proposed.
(3) Relationship to nearby highway or collector street.
(4) Any municipal boundary within 500 feet of the premises.
E. Approximate boundaries and owners of adjacent acreage
properties and boundaries and the name of the adjacent subdivision.
F. Subdivision boundary lines (heavy solid line) and
survey data.
H. Topographic contours at two-foot intervals in the
National Oceanic and Atmospheric Administration Survey datum of mean
sea level or, where it is impractical to use a mean sea level datum,
an assumed elevation may be used at the discretion of the Planning
Board.
(1) Five-foot intervals may be used in cases where the
terrain is unusually steep.
(2) Contours shall extend 200 feet beyond the boundaries
of the subdivision unless waived by the Planning Board.
I. Existing site conditions.
(1) All street rights-of-way on the subdivision and within
200 feet of its boundaries:
(a)
Location, name and width.
(b)
Center-line elevation at intersections and other
critical points.
(c)
Designation as to whether highways are state,
county or Town highways.
(d)
Proposed state, county or Town highways as of
date of survey.
(2) Other rights-of-way and easements on the subdivision
and those within 200 feet of its boundaries which will influence the
subdivision design:
(a)
Location, identification and width.
(b)
Restrictions of use, if any.
(3) All drainage structures on the subdivision and within
200 feet of its boundaries:
(a)
Location and type of structure.
(b)
Invert elevations and similar data where applicable.
(4) Other utility structures, such as water mains, gas
mains and powerlines, on the subdivision and those within 200 feet
of its boundaries which will influence the subdivision design.
(5) All marshes, lakes, ponds, streams, creeks, bays,
canals and land subject to periodic or occasional flooding, located
on the subdivision design:
(a)
Location and area covered, indicating apparent
mean high water or normal waterline if not subject to tidal effect.
(b)
Waterline referred to date of survey.
(6) Test hole data.
(a)
Data, location and graphic representation of
findings for all test holes, including groundwater level.
(b)
Locations shall include critical points and
areas where drainage structures requiring seepage are to be constructed.
(c)
In problem soil areas, the Planning Board may
require special borings to be made by the Suffolk County Soil and
Water Conservation District and may request comments as to the practicality
of the subdivision plan being considered relative to these soils.
(7) Federal, state, county or Town parks, schools or other
public lands and historic sites and buildings.
(8) Buildings and structures located on the subdivision
and those within 200 feet of its boundaries which will influence the
subdivision design.
J. Proposed site conditions. (See Article
X, Design Standards.) The proposed street and lot layout and drainage plan shall cover the entire holding of the subdivider.
(1) Street layout.
(a)
Location, name and right-of-way width.
(b)
Proposed center-line elevation at intersections
and at principal changes in gradient.
(c)
Center-line gradient shown in percent of slope.
(d)
Center-line profile at a horizontal scale of
one inch equals 50 feet and a vertical scale of one inch equals 10
feet.
(2) Preliminary stormwater drainage system plan.
(a)
Location, type and capacity of storage structures,
including size, approximate invert elevations of all piping, structures
and recharge basins.
(b)
Watershed outlines, with approximate area in
acres. (United States Coast and Geodetic Survey maps may be used.)
(c)
Submission of preliminary drainage calculations
in accordance with Highway Department standards for the Town of Shelter
Island.
(3) Lot layout.
(a)
Lot lines and dimensions to the nearest foot.
(b)
Approximate area of each lot in square feet.
(c)
Easements and restricted areas, with notations
as to purpose or restriction.
(d)
Identification of lots and parcels for special
uses to be offered for dedication.
K. Street names. There shall be no duplication of street
names within any fire, postal or school district in the Town.