The Planning Board, in considering an application for the subdivision
of land, shall be guided by the following considerations and standards.
Said standards shall be deemed to be minimum requirements for the
convenience, health, safety and welfare of the Town.
A. Character of land. Land to be subdivided shall be of such character
that it can be used safely for building purposes without danger to
health or peril from fire, flood or other menace. Land subject to
such hazards shall not be subdivided nor developed for residential
purposes, nor for such other uses as may increase danger to health,
life or property or aggravate a flood hazard, but such land may be
set aside for such uses as shall not involve such danger nor produce
unsatisfactory living conditions or be improved to remedy such hazardous
conditions in a manner satisfactory to the Planning Board and consistent
with any applicable requirements of other Town regulations and/or
ordinances.
B. Frontage on improved street. The area proposed to be subdivided shall
have frontage on and direct access to a street duly placed on the
Official Map, and if such street is not improved to the satisfaction
of the Planning Board, such improvement shall be a condition of subdivision
approval.
C. Streets to conform to Town development plan and Official Map. Streets
in subdivisions shall conform to the Official Map and shall be properly
related to the proposals shown on the Town development plan. The plat
shall include all streets shown on the said map and plan which are
within the site and such other streets as the Board may require.
D. Preservation of natural cover. Land to be subdivided shall be laid
out and improved in reasonable conformity to existing topography,
in order to minimize grading, cut and fill and to retain, insofar
as possible, the natural contours, limit stormwater runoff and conserve
the natural cover and soil. No trees, topsoil or excavated material
shall be removed from any subdivision except where necessary and incidental
to the improvements of lots and the construction of streets and related
facilities. Topsoil shall be restored to a depth of at least six inches
and properly seeded and fertilized in the areas not occupied by buildings
or structures.
[Added 12-12-1978; amended 12-18-2007 by L.L. No. 6-2007]
The following minimum erosion control standards shall be stated
on the construction plans, as shall be the details specified in the
construction standard details, in addition to any other standards
or details necessary for the particular project. All erosion and sedimentation
controls shall also be consistent with the standards and design criteria
as set forth in the Lewisboro Stormwater Management and Erosion and
Sediment Control Law.
A. Road and drainage improvements.
(1) All topsoil to be stripped from the area being developed shall be
stockpiled not less than 200 feet from any body of surface water and
shall be immediately seeded to Manhattan rye grass.
(2) On all embankment fill slopes, topsoil shall be stripped at least
five feet wider than required for the embankment toe of slope. A protective
berm of topsoil shall be left in this area, running parallel to the
contours for the purpose of restricting drainage runoff. The topsoil
berm shall be seeded as required for stockpiles.
(3) In addition to the above, further erosion and siltation control measures,
including, but not limited to, slit trench silt traps, staked hay
bales, brush checkdams shall also be employed where necessary for
supplementary erosion control measures.
(4) All cut slopes and embankment fills are to be immediately laid back
and stabilized as follows:
(a)
Graded to finished slopes.
(c)
Topsoiled with not less than four inches of suitable topsoil
material.
(d)
Seeded with Manhattan rye grass. Seed shall be applied at the
rate of not less than five pounds per 1,000 square feet.
(e)
Mulched with not less than one inch and not more than three
inches of straw (two tons per acre) and anchored in a suitable manner.
(5) Temporary on-site siltation basins for the immediate control of erosion
and siltation are to be provided when and where required or ordered.
The length, width and depth of such basins are to be determined in
the field in accordance with United States Department of Agriculture
Natural Resources Conservation Service practices.
(6) All erosion control structures are to be maintained in proper functioning
order and are to be replaced as necessary.
B. Streams.
(1) Filter fabric is to be Mirafi 140 as manufactured by the Celanese
Corporation or approved equal.
(2) All construction activities in or around streams are to be provided
with temporary erosion control structures as shown in detail, Silt
Fence-Hay Bale Erosion and Sediment Control Standard Arrangement, located immediately downstream from such activity. These
structures are to be in place as shown prior to the start of any upstream
construction activity.
(3) Construction of temporary erosion control structures are to begin
with the farthest downstream (the silt fence) and thence proceeding
upstream until all four structures are in place.
(4) After construction, the temporary erosion control structures are
to be removed in reverse order with the most upstream structure removed
first and thence proceeding downstream to the silt fence. The silt
fence is to be removed only after the stream is flowing clear downstream
of the fence.
(5) Construction activities are to begin with the farthest downstream
work and proceed to activities farther upstream.
(6) All temporary erosion control structures are to be left in place,
maintained and replaced as needed until all work upstream therefrom
has been completed and all related temporary erosion control structures
have been removed.
(7) All embankments to be graded and seeded immediately upon being laid
back.
C. General.
(1) Construction equipment shall not unnecessarily cross live streams
except by means of bridges and culverts or other approved methods.
(2) Wherever feasible, natural vegetation should be retained and protected.
(3) Only the smallest practical area of land should be exposed at any
one time during development.
(4) When land is exposed during development, the exposure shall be kept
to the shortest practical period of time.
(5) The permanent final vegetation and structures shall be installed
as soon as practical, and as may be directed by the engineer.
The owner may place restrictions on any of the land contained
in the subdivision greater than those required by the Zoning Ordinance. Such restrictions shall be indicated on the subdivision
plat.