A.
During preliminary consultation with the Town, the subdivider shall
discuss stormwater management and stormwater quality options within
the subdivision. The subdivider shall be required to implement one
of the following methods of meeting the stormwater management requirements.
The Town Board shall determine which method is the most appropriate
to pursue.
(1)
Stormwater assessment. The subdivider contributes an amount determined
by the Town Board to the Town's Regional Detention Basin Fund.
The Regional Detention Basin Fund will be used by the Town to pay
for the design and construction of future regional detention basins.
Contributions to the fund will be based on zoning and total acreage.
(2)
Regional detention basin. The subdivider constructs an on-site regional
detention basin designed by the Town. The subdivider dedicates the
Town a stormwater easement or drainage right-of-way in order to permit
Town maintenance and repair of the regional detention basin. The subdivider
may be eligible for regional detention basin funds due to the additional
land requirements and construction costs associated with a regional
detention basin.
(3)
Wet/dry detention basin. The subdivider designs and constructs an
on-site dry detention basin at no cost to the Town. A dry detention
basin detains the on-site peak two-year and ten-year post-development
runoff rate and releases it at the respective on-site peak pre-development
runoff rate (the subdivider may be required to construct a wet or
extended dry detention basin at no cost to the Town instead of a dry
detention basin in order to improve stormwater quality as well). The
subdivider dedicates to the Town a stormwater easement or drainage
right-of-way.
B.
A drainage plan is required showing the entire subdivision and surrounding
perimeter area. The plan shall contain:
(1)
Existing one-foot contour elevations, based on National Map Accuracy
Standards and U.S. Coast and Geodetic Survey datum as utilized by
the Town.
(2)
Proposed lot layout consistent with plat or certified survey, including
lot number.
(3)
Proposed elevations of lot corners. Front lot corner grades (at the
right-of-way line) shall be based on a slope of 1/2 inch per foot
from the top of curb to future sidewalk location and 1/4 inch per
foot for a future five-foot-wide sidewalk.
(4)
Drainage patterns with percent slope and easements, if necessary.
Identify primary drainage swales that convey runoff from four or more
residential lots. Primary drainage swales shall have a twenty-foot-wide
easement.
(5)
Street layout, including proposed storm sewer improvements with proposed
elevations. Street elevations shall be shown at intersections and
changes in grade. Storm sewer elevation shall be shown at manholes
and catch basins to include rim and invert elevations.
(6)
If required, detention basin plans showing existing and proposed
grades, including inlet and outlet structure details.
(7)
Peak pre-development runoff rate, peak post-development runoff rate,
and increase in peak runoff rate due to development within the subdivision.
C.
In any new subdivision, prior to issuance of any building permits, in addition to the requirements of § 267-28I, the developer shall grade the road right-of-way and primary drainage swales. After completion of grading, the developer shall submit two copies of the subdivision drainage plan to the Town, certifying that the grades of primary swales and rights-of-way have been adjusted to final grades. If curb and gutter is not constructed prior to building permit issuance, the developer shall provide field staking by his surveyor or engineer to set driveway and house grades.
A.
The owner or builder shall obtain grade information from the Town
(i.e., proposed lot corners from drainage plan and proposed top of
curb) for inclusion into the building site plan required at the time
of building permit application.
B.
A site plan (two copies), using the form drawing provided, showing
the lot and proposed building as follows:
(1)
Lot location map/subdivision name.
(2)
Lot dimensions.
(3)
Address (if applicable).
(4)
Proposed lot corner elevations (consistent with the subdivision drainage
plan).
(5)
House footprint, garage and driveway location.
(6)
Proposed grade at front of building or garage floor (18 to 30 inches
from the top of curb to top of foundation wall measured from center
of lot).
