Where required by the town board, the subdivider shall install, at his own expense, any required street and utility improvements, or other improvements as required herein. In addition, where required by the town board, the subdivider shall, prior to the final approval of any major subdivision, county plat, or minor subdivision, enter into a contract with the town agreeing to install the required improvements and shall file with said contract a surety bond or make other financial arrangements with the town board guaranteeing the completion of such improvements with a period of time specified by the town board.

(1)

Public and Private Roads. The subdivider may be required to dedicate land for public roads and to construct such roads, as determined by the Planning and Zoning Department or town board. Where dedication and/or construction is required, the following shall apply:

(a)

Road Design and Location. Public roads shall be designed and located to take into account:

1.

Existing and planned streets, particularly as shown on any official street map which has been adopted by Portage County or any local unit of government;

2.

Topographic conditions including the bearing capacity and erosion potential of the soil;

3.

Public convenience and safety including facilitating fire protection, snow plowing and pedestrian traffic;

4.

The proposed uses of land to be served;

5.

Anticipated traffic volumes; and

6.

Further resubdivision possibilities.

(b)

Construction Standards for Public Roads. Town roads shall be constructed as required by town ordinance. Where no town ordinance pertaining to road construction exists, town roads shall have a minimum right-of-way width of 66 feet and may be required to comply with other standards when so determined by the Portage County Highway Department.

(c)

Frontage and Backage Roads. The use of frontage and backage roads may be required along principal and minor arterial roads, at the discretion of the Planning and Zoning Department.

(d)

Cul-de-sacs. In addition to the requirements of this section, cul-de-sacs shall have a minimum turnaround right-of-way diameter of 120 feet and a minimum turnaround driving surface of 100 feet in diameter. Cul-de-sacs shall have a maximum length of 600 feet within any municipal sewer service jurisdiction/boundary approved by the County and the State Department of Natural Resources and 1,000 feet where no sewer service jurisdiction presently exists. Length shall be measured from the farthest point of the turnaround right-of-way to the right-of-way of the nearest connecting through-street. These standards shall not be applicable to temporary cul-de-sacs.

(e)

Access Points. In order to protect and preserve the safety, efficiency, and planned function of roadways, all public and private access points into public roads and highways in the unincorporated areas of Portage County shall comply with the provisions contained herein. Certain roads may require greater access protection than is provided here, based on locally adopted plans or policies. Access permits on the state trunk highways system must be acquired from Wisconsin Department of Transportation (DOT), District 4, subject to state and county regulations.

1.

Minimum Distance Between Adjacent Access Points:

a.

Designated road classifications are shown on the Portage County Urban and Rural Functional Classification Maps.

b.

Spacing will be measured from the midpoint of access points on the same side of the road, including road intersections.

2.

Design. The use of shared or consolidated access is encouraged in order to minimize the number of access points and resulting interruptions to traffic flow. Access points along opposite sides of a roadway shall be located directly opposite each other, whenever possible. No private access shall exceed 66 feet in width at the right-of-way line. On local roads, access points shall be located a minimum of 50 feet from a road intersection, as measured from the midpoint of the access to the intersection of the road rights-of-way.

3.

Preexisting Lots of Record. These standards shall not be enforced in such a way as to deny access to lots of record which are in existence prior to the adoption of this ordinance. However, any new access to such lots shall be in compliance with the access separation standards of this section.

4.

Corner Lots. Where a parcel abuts more than one public road, and where such roads are classified differently according to the functional classification, access shall be required onto the road with the lowest order functional status whenever possible.

5.

Modifications. The Planning and Zoning Committee may permit modifications from the provisions of this section where no viable alternatives exist and where the application of these standards would create a hardship, but in no case shall a modification be permitted to section 7.4.6(1)(e)1. which is less than the following minimum standards: Principal Arterial 850 feet, Minor Arterial 500 feet, Collectors 275 feet, except on those road segments with a posted speed limit of 35 mph or less, modifications shall not be less than the following: Principal Arterial 500 feet, Minor Arterial 300 feet, Collectors 150 feet; this exception shall not apply where reduced or advisory speeds are associated with warning signs related to road hazards such as curves or other special conditions. The Planning and Zoning Committee shall be the only body having authority to reject a modification request.

6.

Consistency with State Access Control Plans. In no case shall the Planning and Zoning Committee or its designated agent apply the access separation standards of this section or approve a modification thereof so as to conflict with any access control plan approved by the State Department of Transportation.

(f)

Road Intersections. Roads shall intersect each other at nearly right angles as topography and other limiting factors of good design permit, as determined by the Planning and Zoning Department. Where roads do not intersect at right angles, the minimum angle of intersection shall not be less than 60°. In order to avoid dangerous jogs, roads should be designed to intersect directly opposite each other or to have a minimum centerline offset of 125 feet, unless a greater separation is deemed necessary by the Planning and Zoning Department.

(2)

Groundwater Management and Water Supply Facilities.

Where there is no existing public water supply facility, the Planning and Zoning Department is empowered to require the subdivider to provide sufficient data to determine whether or not a water supply of acceptable quality exists. The data required of the subdivider shall be based on the advice and recommendations of the County Water Quality Specialist, the Central Wisconsin Groundwater Center and any other knowledgeable professionals that may assist the County with water quality issues.

The Planning and Zoning Department shall, at the time the sketch plat is submitted or within 15 days thereafter, inform the subdivider as to the particular groundwater monitoring and testing data to be provided by the subdivider, which may include but shall not be limited to the following:

(a)

Location, number, depth and maintenance of monitoring wells;

(b)

Direction and/or rate of groundwater flow;

(c)

Water quality parameters to be tested (pesticides, herbicides, bacteria, nitrates, etc.);

(d)

Sampling dates;

(e)

Easements; and

(f)

Conditions of the upgradient recharge area and location of the subdivision with respect to any downgradient municipal or private well recharge areas.

All water quality analyses shall be conducted by a state certified laboratory.

Where adequate water samples or test data can be obtained from existing wells within the immediate area of a proposed subdivision, such data may be utilized, in lieu of on-site monitoring wells, as determined by the Planning and Zoning Department. Monitoring wells may be required for a major subdivision or county plat, but shall not be required for minor subdivisions.

The subdivider shall provide the Planning and Zoning Department with all required groundwater data prior to the preliminary plat being submitted for approval, in the case of a major subdivision or prior to the time the county plat or minor subdivision is submitted for approval. Specific monitoring and/or test results shall be recorded on the face of the preliminary plat, and any final plat(s), county plat(s) or certified survey map(s), as well as the deed for each lot.

The determination of acceptable water quality by the Planning and Zoning Department shall be based on the on-site monitoring data or test results from nearby wells, the vulnerability of the site to groundwater contamination, the direction and rate of groundwater flow, adjacent land uses upgradient of the site to the groundwater divide, the location of known point sources of potential contaminants, and known groundwater quality and concerns in adjacent developments. The subdivider may be required to furnish such information as is necessary for this determination. The Planning and Zoning Department may consult appropriate County staff or outside professionals for technical support and evaluation of data.

In the event that monitoring and testing results indicate significant groundwater quality problems, the Planning and Zoning Department may require a community water system for the subdivision including a centralized well, as opposed to individual wells. Furthermore, a community water system may be required where a proposed subdivision with demonstrated groundwater quality problems, lies within an area where future hookup to a municipal water system is anticipated, such as within a designated sewer service area. Where more significant water quality problems exist, the Planning and Zoning Department may recommend denial of the proposed subdivision by the Planning and Zoning Committee.

Use of a water treatment system to meet acceptable water quality standards shall only be considered if the development includes a community well and distribution system, and an adequate maintenance association for the central community water supply and treatment system. Water treatment systems shall also be subject to approval by the Wisconsin Department of Natural Resources, as required by State Statutes. Treatment systems for individual wells shall not be permitted as a means for approval of new development.

(3)

Survey Monuments. The following shall apply:

(a)

The subdivider of a major subdivision shall install survey monuments in accordance with the requirements of Wis. Stats. § 236.15.

(b)

The subdivider of a county plat or minor subdivision shall install survey monuments in accordance with the requirements of Wis. Stats. § 236.34.

(4)

Storm Water Management and Construction Site Erosion Control.

(a)

General Requirements:

A storm water management plan shall be provided by the subdivider, at the determination of the Planning and Zoning Department. The subdivider or agent shall submit recommendations for storm water management, at the time of the submission of the sketch plat, in the case of a major subdivision, county plat, or minor subdivision. Storm water management plans shall be submitted over the signature and seal of a registered professional engineer, unless authorized otherwise by the Planning and Zoning Department. A registered professional engineer or certified surveyor, unless authorized otherwise by the Planning and Zoning Department, will be required to oversee installation of all storm water management features shown on the approved plans. Certification shall be required over the seal of the registered professional, unless authorized otherwise by the Planning and Zoning Department that the "as built" conditions substantially conform to the approved plans. This certification shall not release the subdivider from the responsibility to construct in accordance with approved plans until "as built" conditions have been approved by the governing Town and County.

The development is also required to meet all appropriate construction site and post-construction performance standards included in Wisconsin State Code Chapter NR 151, as well as any other applicable state or federal requirements. Any such requirements shall be incorporated into all storm water management plans submitted to the Planning and Zoning Department.

(b)

Design Considerations:

1.

The storm water runoff control plan prepared in compliance with this procedure policy shall consider and design for conditions unique to the site. Unique site conditions may include, but are not limited to: steep slopes, high water table; limited downstream drainage system; previously altered conditions; shallow soils; and smaller sites with limited available space. The design criteria for such unique site conditions, and other innovative design proposals, shall be agreed upon by the designer and the governing Town and County.

2.

Storm water management may include, but is not limited to, the use of the following: Diversions; Waterways; Detention and Retention Ponds; Infiltrations Basins; Culverts, including size and placement; Topography data at appropriate contour intervals; Road elevations (including private access), including placement of; and Seeding and Mulching. Such plans shall be based upon a 25-year storm event using a minimum runoff curve number (RCN) of 60. A higher storm event or RCN may be necessary when considering protection of water quality and/or preventing runoff onto adjacent property. The Planning and Zoning Department may require that drainage easements of widths sufficient to accommodate storm runoff, be provided.

3.

All storm water runoff control plans shall consider and design for the safety of the public. Low-grade side slopes and shallow shelves in the basin designs are encouraged. In some situations fencing may be necessary as determined by planning and zoning—minimum standards for fencing.

4.

All storm water runoff control plans shall consider the impacts of increased peak flow and/or increased volume to the capacity of the planned development and downstream drainage system. Culverts will require special design criteria set and/or approved by the governing Town and County.

5.

The design of storm water runoff control plan facilities shall be adequately sized for the contributing drainage area. The designer may opt to include the offsite drainage area in the plan facilities or to safely divert or route the offsite drainage flow around the plan facilities. Water from upstream of the development shall be conveyed through or diverted around the parcel so as to minimize erosion and flooding.

(5)

Sanitary Sewerage.

(a)

General Provisions:

1.

In areas that have a public sanitary sewer system on or near the proposed subdivision, the local municipality furnishing such service and the Planning and Zoning Committee shall determine the feasibility of service and the procedures to be followed by the subdivider in joining the system.

2.

The Planning and Zoning Committee may prohibit the installation of on-site waste disposal facilities requiring soil absorption systems and where such systems could have significant negative impacts on groundwater and surface water quality. The Committee may, with approval of the Department of Natural Resources, allow alternative or experimental methods of waste treatment and disposal. Plans for on-site waste disposal facilities not utilizing soil absorption systems shall be approved in writing by the Planning and Zoning Committee. The subdivider shall clearly indicate on the face of the plat or certified survey map in any deeds of conveyance that soil absorption systems are not to be used.

3.

Disposal facilities shall be constructed to meet the requirements of Chapter ILHR 83, Wisconsin Administrative Code, the standards set out in section 7.9, Portage County Ordinances, and other state and local requirements.

4.

The subdivider shall carry out soil tests in the manner required by Wis. Admin. Code Comm 83. Lots shall comply with the minimum areas and widths, and shall have the specified minimum areas free of limiting conditions to meet the requirements of Wis. Admin. Code Comm 83.

(b)

Determination of Suitability. The Planning and Zoning Department shall determine the suitability of a proposed development for soil absorption systems. Such determination shall be based on the soils maps contained in the Portage County Soil Survey together with the suitability ratings in Appendix C of this section. Where a proposed building sites(s) includes soils which are rated as having severe or very severe limitations for soil absorption systems, the subdivider may be required to provide further soil evaluations, including soil borings. Such evaluations shall be conducted by a certified soil tester.

Where said soil evaluations indicate that the site(s) in question is unsuitable for soil absorption systems, the plat or certified survey map or part thereof which is unsuitable shall not be approved for building unless an appeal is allowed under section 7.9.2(3) Portage County Ordinances.

(6)

Surface Water Management. Surface water management for the prevention of erosion and flooding shall be provided by the subdivider at the determination of the Planning and Zoning Department. The subdivider or agent shall submit recommendations for surface water management at the time of the submission of the sketch plat in the case of a major subdivision, county plat, or minor subdivision. Proper surface water management shall include, but not be limited to, the following:

(a)

Diversions;

(b)

Waterways;

(c)

Culverts and placement of;

(d)

Topography data at appropriate contour intervals;

(e)

Road elevations and placements of, including private access; and

(f)

Seeding and mulching.