The subdivider shall install survey monuments placed in accordance
with the requirements of § 236.15, Wis. Stats., and as may
be required by the Town Engineer.
In all subdivisions as defined herein, the Town Board may require
the subdivider to construct concrete curb and gutters in accordance
with the plans and standard specifications approved by the Town Engineer.
Wherever possible, provision shall be made at the time of construction
for driveway access curb cuts.
When permanent rural street sections have been approved by the
Town Board, the subdivider shall finish grade all shoulders and road
ditches, install all necessary culverts at intersections and, if required,
surface ditch inverts to prevent erosion and sedimentation in accordance
with plans and standard specifications approved by the Town Engineer
and as set forth in this chapter.
When public sanitary sewerage facilities are available to the
subdivision, such facilities shall be designed and constructed in
such a manner as to make adequate sanitary sewerage service available
to each lot within the subdivision. In addition:
A. The Town Board may require the installation of sewer laterals to
the street lot line.
B. The size, type and installation of all sanitary sewers and sanitary
sewer laterals proposed to be constructed shall be in accordance with
plans and standard specifications approved by the Town Engineer.
C. Where a sanitary district has been created pursuant to Ch. 60, Subch.
IX, Wis. Stats., for the purpose of providing and constructing sanitary
sewers, such plans and standard specifications shall be further subject
to approval by the Sanitary District Commission and the Town Board.
[Amended at time of adoption of Code (see Ch. 1, General
Provisions, Art. III)]
D. The subdivider shall assume the cost of installing all sanitary sewers,
sewer laterals, and sewer appurtenances within the proposed subdivision,
except for the added cost of installing sewers greater than eight
inches in diameter which are necessary to serve tributary drainage
areas lying outside of the proposed subdivision. In addition, the
subdivider shall pay to the Town or Sanitary District wherein the
subdivision plat is located a sanitary sewer trunk line connection
fee based on the added cost of installing larger sewers in the total
tributary drainage area which shall be prorated in proportion to the
ratio which the total area of the proposed plat is to the total drainage
area to be served by such larger sewers.
E. The subdivider shall install sanitary sewers in accordance with this
chapter and specifications of the Town Engineer when it is determined
that the proposed subdivision lies within a public sanitary sewer
service area and sanitary sewer facilities are programmed to be extended
to the proposed subdivision within six years. Until such time as the
public sewers within the subdivision can be connected to the community
public sewer system, they shall be temporarily capped. No private
or public use shall be connected to the sewers within the subdivision
until such sewers are connected to the larger community system. The
subdivider shall indicate on the face of the plat that the owner of
private uses within the subdivision shall connect such uses to the
sewers in the subdivision at the time such sewers are connected to
the community sewer system, and that the Town and/or the Town Sanitary
District is held harmless for any damages or costs incurred to disconnect
and abandon any private on-site waste treatment system then in place,
and any costs associated with connection to the public sewer mains.
The subdivider shall construct stormwater drainage facilities
adequate to serve the subdivision which may include curbs and gutters,
catch basins and inlets, storm sewers, road ditches, culverts, open
channels, water retention structures and settling basins. All such
facilities shall be of adequate size and grade to hydraulically accommodate
the maximum potential volumes of flow through and from within the
subdivision and shall be so designed as to prevent and control soil
erosion and sedimentation and to present no hazards to life or property.
A. The following types of developments will be subject to on-site detention,
runoff, and water quality control provisions.
(1) All developments, other than residential, with a gross aggregate
area of three acres or more.
(2) Residential developments with a gross aggregate area of five acres
or more.
(3) Residential developments with a gross aggregate area of three acres
or more, where 50% or more of the area is impervious surfaces, i.e.,
roads, building, parking facilities and other improvements.
(4) Developments which, in the opinion of the Town Engineer, will exceed
the safe capacity of the existing drainage facilities, or the receiving
water body, or will cause erosion or water pollution, or will otherwise
endanger downstream property owners of their property. "Safe capacity"
is defined as the rate of flow that can be handled without the potential
for flooding damages.
B. In the case of phased development, or where there is the potential
for phased development, the gross aggregate area shall be defined
as the entire developable parcel under the ownership of the developer.
C. Developments subject to on-site detention and runoff control provisions
shall provide on-site storage to safely accommodate runoff from the
site in its developed condition for a 100-year intensity rainfall
event of any duration, while utilizing a peak discharge rate from
the site which does not exceed the peak runoff rate from the site
for the two-year and five-year intensity rainfall event which would
have occurred with the site in its undeveloped condition.
D. Stormwater computations shall be submitted utilizing Technical Release
No. 55, Urban Hydrology for Small Watersheds, prepared by USDA Soil
Conservation Service, or other approved procedures. The analysis shall
contain inflow and outflow hydrographs, basin routing and time/elevation
graphs for both the ten-year and 100-year event. The analysis shall
be submitted to and approved by the Town Engineer and Town Plan Commission
prior to any construction activities. After construction is completed,
an as-built topographical survey of the detention facility shall be
submitted to the Town to confirm that the constructed facility matches
the approved design.
E. Detention control provisions are not required in areas of the Town
where downstream stormwater conveyance systems have been designed
and installed to eliminate the potential for downstream flooding damages.
In addition:
(1) Unpaved road ditches and back slopes shall be shaped and seeded and/or
sodded as grassed waterways. Where the velocity of flow is in excess
of four feet per second on soils having a severe or very severe erosion
hazard and in excess of six feet per second on soils having moderate,
slight, or very slight erosion hazard, the subdivider shall install
a paved invert or check dams, flumes, or other energy dissipating
devices.
(2) Drainage facilities shall, if required, include water retention structures
and settling basins so as to prevent erosion and sedimentation where
such facilities discharge into streams or lakes. The design criteria,
the size, type, grades, and installation of all stormwater drains
and sewers and other cross-section, invert and erosion control paving
check dams, flumes, or other energy dissipating structures and seeding
and/or sodding of open channels and unpaved road ditches proposed
to be constructed shall be in accordance with the plans and standard
specifications approved by the Town Engineer.
(3) Where a sanitary district has been created pursuant to Ch. 60, Subch.
IX, Wis. Stats., for the purpose of providing and constructing surface
drainage facilities, storm sewers, or other drainage improvements,
such plans and standard specifications shall be further subject to
approval by the Sanitary District Commission.
[Amended at time of adoption of Code (see Ch. 1, General
Provisions, Art. III)]
(4) The subdivider shall assume the cost of installing all storm sewers
within the proposed subdivision, except for the added cost of installing
storm sewers greater than 24 inches in diameter which are necessary
to serve tributary drainage areas lying outside of the proposed subdivision.
In addition, the subdivider shall pay to the Town or sanitary district
wherein the subdivision is located a storm sewer trunk line connection
fee based on the added cost of installing larger sewers in the total
tributary drainage area, which shall be prorated in proportion to
the ratio which the total area of the proposed plat is to the total
drainage area to be served by such larger sewers.
[Amended at time of adoption of Code (see Ch. 1, General
Provisions, Art. III)]
When public water supply and distribution facilities are available
to the subdivision plat or when it is proposed to establish a private
water supply and distribution system to serve two or more lots, the
subdivider shall cause such water supply and distribution facilities
to be installed in such a manner as to make adequate water service
available to each lot within the subdivision. The subdivider shall
make provision for adequate private water systems as required by the
Town in accordance with the standards of the Wisconsin Department
of Natural Resources. In addition:
A. The Town Board may require the installation of water laterals to
the street lot line.
B. The size, type, and installation of all public water mains proposed
to be constructed shall be in accordance with plans and standard specifications
approved by the Town Plan Commission, upon the recommendation of the
Town Engineer.
C. The subdivider shall assume the cost of installing all water mains,
water laterals, and water system appurtenances within the proposed
subdivision except for the added cost of installing water mains greater
than eight inches in diameter.
The subdivider shall cause electrical power and telephone facilities
to be installed in such a manner as to make adequate service available
to each lot in the subdivision. No electrical or telephone service
shall be located on overhead poles unless otherwise allowed by the
Plan Commission due to exceptional topography or other physical barrier.
Plans indicating the proposed location of all electrical power, and
telephone distribution and transmission lines required to service
the plat shall be approved by the Town Engineer.
At the direction of the Town Board, the subdivider shall install
at the intersection of all streets proposed to be dedicated a street
sign of a design as approved by the Town Engineer.
The subdivider shall plant those grasses, trees, and vines,
a species and size specified by the Town Board, necessary to prevent
soil erosion and sedimentation. The Plan Commission may require the
subdivider to provide or install certain protection and rehabilitation
measures such as fencing, slopes, seeding, trees, shrubs, riprap,
wells, revetments, jetties, clearing, dredging, snagging, drop structures,
brush mats, willow poles, and grade stabilization structures. In addition:
A. Tree cutting and shrubbery clearing shall not exceed 30% of the lot
or tract, and shall be so conducted as to prevent erosion and sedimentation,
preserve and improve scenic qualities, and, during foliation, substantially
screen any development from stream or lake users.
B. Paths and trails in wooded and wetland areas shall not exceed 10
feet in width unless otherwise approved by the Plan Commission and
shall be so designed and constructed as to result in the least removal
and disruption of trees and shrubs, and the minimum impairment of
natural beauty.
C. Earth moving, such as grading, topsoil removal, mineral extraction,
stream course changing, road cutting, waterway construction, or enlargement,
removal of stream or lake bed materials, excavation, channel clearing,
ditching, drain tile laying, dredging, and lagooning, shall be so
conducted as to prevent erosion and sedimentation and to least disturb
the natural fauna, flora, watercourse, water regiment, and topography.
D. Review of the conduct of all cutting, clearing, and moving shall
be requested of the County Soil and Water Conservation District Supervisors
and may be requested of the State District Fish and Game Managers,
and the State District Forester by the Town Engineer or Plan Commission,
as they deem appropriate.
If for any reason the subdivider fails to install public utilities
or facilities as prescribed herein or as ordered by the Town Board
pursuant to this chapter, the Town Board may install such improvements
and assess the full cost of such installations against the subdivider
or property owner as set forth in § 66.0703, Wis. Stats.
Also, the Town and subdivider may agree to have public improvements
installed by the Town pursuant to § 66.0703, Wis. Stats.