The subdivider shall grade each land division in order to establish
street, block and lot grades in proper relation to each other and
to topography as follows:
A. Master site-grading plan.
(1) A master site-grading plan shall be prepared by the subdivider for
all new subdivisions. This plan shall be prepared in accordance with
the requirements and standards of the Town set forth by the Town Engineer.
(2) The master site-grading plan shall show existing and proposed elevations
of all lot corners, control points and building locations. The plan
shall also indicate all overland storm drainage in and adjacent to
the subdivision. The cost of the preparation of such a plan shall
be paid for by the Town, using escrow funds provided by the subdivider.
(3) After approval or modification of these plans by the Town Engineer,
the full width of the right-of-way of the proposed streets within
the subdivision and the entire subdivision lot area shall be graded
in accordance with the master site-grade plan. The owners and contractors
within the subdivision lots shall adhere to the approved plans.
(4) Upon completion of all street and subdivision grading, the grades
shall be checked and certified by an independent registered land surveyor
or professional engineer to determine that the completed grading work
is in accordance with the master site-grading plan.
(5) The cost of all required grading work, supervision, certification,
inspection and engineering fees shall be paid for by the subdivider.
B. Right-of-way grading. The subdivider shall grade the full width of
the right-of-way of all proposed streets in accordance with the approved
plans, including the grading of sight triangles at each intersection.
Side slopes within the right-of-way shall be at least 4:1.
C. Block grading. A block grading plan shall be prepared by the subdivider
for all new subdivisions. Block grading shall be completed by any
of the following methods:
(1) Regrading along the side or rear lot lines which provides for drainage
to the public drainage facilities, provided any ditches or swales
are in public drainage easements, provided that a deed restriction
is adopted which prohibits alteration of the grades within five feet
of any property line from the grades shown on the master site block
grading plan.
(2) Parts of all lots may be graded to provide for drainage to a ditch
or to a swale.
(3) Kettle ponds left within blocks or lots shall be positively drained
via the overall site stormwater plan.
D. Miscellaneous grading requirements.
(1) Block grading shall be completed so that water drains away from each
building site toward public drainage facilities at a grade approved
by the Town Engineer, and provisions shall be made to prevent drainage
onto properties adjacent to the land division unless to a public drainage
facility.
(2) Grading activities shall not result in slopes greater than 4:1 on
public lands or lands subject to public access.
(3) The topsoil stripped for grading shall not be removed from the site
unless identified in the erosion control plan approved by the Town
Engineer as not being necessary for erosion control or site landscaping
purposes. Topsoil shall be uniformly returned to the lots when rough
grading is finished. Topsoil piles shall be leveled and seeded for
erosion control prior to the Town releasing the one-year guarantee
provision on public improvements in the streets adjacent to the lots
on which the topsoil is stockpiled.
(4) Such grading shall not result in detriment to any existing developed
lands, either within or outside of the corporate limits.
(5) Such grading shall be with consideration for septic drainfield installation
and operation. Verification of septic drainfield viability may be
required for significant grading of lots and blocks.
(6) Excess excavation remnants, such as earthfill and boulders, shall
be completely disposed of pursuant to the Town Engineer and Town Board
approval.
E. Drainage flows.
(1) The subdivider shall cause to be set upon the block grading plan
arrows indicating the directions of drainage flows for each property
line not fronting on a street on all parcels and along each street
as will result from the grading of the site, the construction of the
required public improvements, or which are existing drainage flows
and will remain. The arrows indicating the directions of flows shall
be appropriately weighted so as to differentiate between the minor
and major one-hundred-year event drainage components. The arrows shall
be accompanied on the block grading plan with the following note:
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"Arrows indicate the direction of drainage flows in various
components resulting from site grading and the construction of required
public improvements."
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(2) The drainage flow components located in front, side or rear lot areas,
or within designated drainage easements, shall be maintained and preserved
by the property owner unless approved by the Town Board.