A.
During preliminary consultation with the village,
the subdivider shall discuss stormwater management and stormwater
quality options within the subdivision. The following options are
available to the subdivider.
(1)
Stormwater assessment. The subdivider contributes
an amount determined by the Village Board to the village's Regional
Detention Basin Fund. The Regional Detention Basin Fund will be used
by the village 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 village. The subdivider
dedicates the village a stormwater easement or drainage right-of-way
in order to permit village 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 village.
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 (subdivider may be required to construct
a wet or extended dry detention basin at no cost to the village instead
of a dry detention basin in order to improve stormwater quality as
well). The subdivider dedicates to the village a stormwater easement
or drainage right-of-way.
B.
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 United States Coast and Geodetic datum
as utilized by the village.
(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 one-half-inch-per-foot
slope 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 to be shown at intersections
and changes in grade. Storm sewer elevation to 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 § 205-27I, 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 village, 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 or her surveyor or engineer to set driveway and house grades.
A.
Owner or builder shall obtain grade information from
the village (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:
