Chapter 17.45
REQUIRED IMPROVEMENTS
Sections:
17.45.050 Rural street sections.
17.45.070 Public sanitary sewerage.
17.45.080 Storm water drainage facilities.
17.45.090 Water supply facilities.
17.45.010 Survey monuments.
The subdivider shall install survey monuments placed in accordance with the requirements of Wis. Stat. § 236.15 and as may be required by the review specialist. (2008 code § 18.09(1))
17.45.020 Grading.
1. After the installation of temporary block corner monuments by the subdivider and establishment of street grades by the Town Board, the subdivider shall grade the full width of the right-of-way of all streets proposed to be dedicated in accordance with plans and standard specifications approved by the Town Board, upon recommendation of the Town Engineer. The subdivider shall grade the roadbeds in the street rights-of-way to subgrade.
2. Cut and filled land shall be graded to a maximum slope of one-on-four or the soil’s angle of repose, whichever is the lesser, and covered with permanent vegetation. (2008 code § 18.09(2))
17.45.030 Surfacing.
After the installation of all utility and storm water drainage improvements, the subdivider shall surface all roadways in streets proposed to be dedicated to the widths prescribed by these regulations, the Town comprehensive plan or comprehensive plan components, and any other applicable regulations. Said surfacing shall be done in accordance with plans and standard specifications approved by the Town Engineer. (2008 code § 18.09(3))
17.45.040 Curb and gutter.
The Town Board may require the subdivider to construct concrete curbs and gutters in accordance with plans and standard specifications approved by the Town Plan Commission, upon recommendation of the Town Engineer; or
In all subdivisions, the Town Board will require the subdivider to construct concrete curbs and gutters in accordance with plans and standard specifications approved by the Town Plan Commission if the average lot size is less than 50,000 square feet. (2008 code § 18.09(4))
17.45.050 Rural street sections.
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 Plan Commission, upon recommendation by the Town Engineer, and as set forth in ETMC 17.45.080(2) and 17.45.140. Or when lot sizes are greater than 50,000 square feet, 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 Plan Commission, upon recommendation by the Town Engineer and as otherwise set forth in this chapter. (Ord. 2010-32 § 2. 2008 code § 18.09(5))
17.45.060 Sidewalks.
In all subdivisions the Town may require the subdivider to construct a concrete sidewalk on both sides of all streets within the subdivision. The construction of all sidewalks shall be in accordance with plans and standard specifications approved by the Town Plan Commission, upon recommendation of the Town Engineer. (2008 code § 18.09(6))
17.45.070 Public sanitary sewerage.
When public sewer facilities are available, or when it is proposed to establish a private sanitary sewerage system to serve two or more lots, the subdivider shall construct sanitary sewers in such a manner as to make adequate sanitary sewerage service available to each lot within the subdivision. In addition:
1. The Town Board shall, for residential lots, require the installation of sewer laterals to the street lot line.
2. The size, type, and installation of all sanitary sewers and sanitary laterals proposed to be constructed shall be in accordance with plans and standard specifications approved by the Town Plan Commission, upon recommendation of the Town Engineer. The latest revision of the “Standard Specifications for Sewer and Water Construction in Wisconsin” shall govern all work. All sanitary sewer and sanitary sewer lateral trenches within proposed streets shall be backfilled with granular material meeting the requirements of the “Standard Specifications”; however, upon written approval of the Town Engineer, the trenches may be backfilled with excavated material meeting the requirements of the “Standard Specifications.” If excavated material is allowed for backfill, it shall be compacted by mechanical methods meeting the approval of the Town Plan Commission, upon the recommendation of the Town Engineer.
3. Where a Town sanitary district has been created pursuant to Wis. Stat. § 60.71 or 60.72 for the purpose of providing and constructing sanitary sewers, such plans and standard specifications shall further be subject to review and approval by the Town Sanitary District Commission.
4. Where an inland lake protection and rehabilitation district has been formed and authorized to exercise sanitary district powers pursuant to Wis. Stat. § 33.22 for the purpose of providing and constructing sanitary sewers, such plans and standard specifications shall further be subject to review and approval by the Lake District Commission.
5. 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 the proposed subdivision. In addition, the subdivider shall pay to the Town or Town Sanitary District 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 same ratio as exists between the total area of the proposed plat and the total drainage area to be served by the larger sewers. (2008 code § 18.09(7))
17.45.080 Storm water drainage facilities.
The subdivider shall construct storm water drainage facilities, which may include curbs and gutters, catch basins and inlets, storm sewers, road ditches, and open channels, water retention structures, and settling basins adequate to serve the proposed subdivision. All such facilities shall be of adequate size and grade to hydraulically accommodate the maximum potential volumes of flow and shall be designed so as to prevent and control soil erosion and sedimentation and all storm water drainage facilities must meet the requirements of the Walworth County Land Disturbance Erosion Control and Storm Water Management Ordinance. In addition:
1. Unpaved road ditches and street gutters shall be shaped and seeded and/or sodded as grassed waterways. Where the velocity of flow exceeds four feet per second on soils having a severe or very severe erosion hazard, or exceeds 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 approved by the Town Plan Commission, upon the recommendation of the Town Engineer.
2. Shoreland 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, and the size, type, grades and installation of all storm water 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 of all applicable Walworth County ordinances and approved by the Town Plan Commission, upon the recommendation of the Town Engineer.
3. Where a Town Sanitary District has been created pursuant to Wis. Stat. § 60.71 or 60.72 for the purpose of providing and constructing surface drainage facilities, storm sewers or other drainage improvements, such plans and standard specifications shall further be subject to review and approval by the Town Sanitary District Commission.
4. Where an inland lake protection and rehabilitation district has been formed and authorized to exercise sanitary district powers pursuant to Wis. Stat. § 33.22 for the purpose of providing and constructing surface drainage facilities, storm sewers or other drainage improvements, such plans and standard specifications shall further be subject to review and approval by the Lake District Commission.
5. 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 those which are necessary to serve tributary drainage areas lying outside of the proposed subdivision. In addition, the subdivider shall pay to the Town or Town Sanitary District 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 same ratio as exists between the total area of the proposed plat and the total drainage area to be served by the larger sewers. (2008 code § 18.09(8))
17.45.090 Water supply facilities.
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 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. Private water systems, when required by the Town, shall be provided by the subdivider in accordance with the standards of the Wisconsin Department of Health and Social Services. In addition:
1. The Town Board shall require the installation of water laterals to the street lot line.
2. 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 Board. The latest revision of the “Standard Specifications for Sewer and Water Construction in Wisconsin” shall govern all work.
3. Where a Town Sanitary District has been created pursuant to Wis. Stat. § 60.71 or 60.72 for the purpose of providing a system or systems of water works, such plans and standard specifications shall also be subject to review and approval by the Town Sanitary District Commission.
4. Where an inland lake protection and rehabilitation district has been formed and authorized to exercise sanitary district powers pursuant to Wis. Stat. § 33.22 for the purpose of providing a system or systems of water works, such plans and standard specifications shall further be subject to review and approval by the Lake District Commission.
5. 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. (2008 code § 18.09(9))
17.45.100 Other utilities.
1. The subdivider shall cause gas, electric power, telephone, and cable television facilities to be installed, where available, in such a manner as to make adequate service available to each lot in the subdivision. Where such services are not available at the time the land division is approved, a restrictive covenant shall be recorded with the plat requiring the underground installation of utilities when they become available.
2. Plans indicating the proposed locations of all gas, electrical power, telephone distribution, cable television and transmission lines required to service the plat shall be approved by the Town Board. (2008 code § 18.09(10))
17.45.110 Street lamps.
The Plan Commission may require the subdivider to install street lamps along all streets to be dedicated, of a design approved by the Town Engineer. Such lamps shall be placed at each street intersection and at such mid-block intervals as may be required by the Town. (2008 code § 18.09(11))
17.45.120 Street name signs.
The subdivider shall install at the intersection of all public and private streets to be dedicated a street sign of a design specified by the Town Board. (2008 code § 18.09(12))
17.45.130 Street trees.
The Plan Commission may require the subdivider to plant at least one tree of a species acceptable to the Plan Commission and at least two and one-half inches in diameter at breast height (dbh) for each 50 feet of frontage on both sides of all streets to be dedicated. The required trees shall be planted in the lawn area of the right-of-way in accordance with plans and standard specifications approved by the Plan Commission. In lieu of planting street trees, the subdivider may, at the time of final plat approval or certified survey map approval, pay a tree fee to the Town Treasurer of $100.00 for each tree to be planted. Monies collected for tree planting shall be kept in a special tree planting fund for that purpose. (2008 code § 18.09(13))
17.45.140 Sediment control.
The subdivider shall plant those grasses, trees, and vines, of species and size specified by the Town Board, necessary to prevent soil erosion and sedimentation. Planting shall be consistent with all Walworth County Land Disturbance Erosion Control and Storm Water Management Ordinance standards. In addition:
1. The Town Board may require the subdivider to provide or install certain protection and rehabilitation measures, such as fencing, sloping, seeding, riprap, revetments, jetties, clearing, dredging, snagging, drop structures, brush mats, willow poles, and grade stabilization structures.
2. Tree cutting and shrubbery clearing shall not exceed 50 percent of the lot or tract and shall be so conducted as to prevent erosion and sedimentation, and to preserve and improve scenic qualities. (See ETMC 17.50.040 and 17.50.050.)
3. Paths and trails in wooded and wetland areas shall not exceed 10 feet in width unless otherwise approved by the Town Board, 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.
4. 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, channeling, clearing, ditching, drain tile laying, dredging, and lagooning, shall be so conducted as to prevent erosion and sedimentation and to minimize disturbance of the natural fauna, flora, watercourse, water regimen, and topography. (See ETMC 17.50.040.)
5. The Town Engineer or Plan Commission may request that the Walworth County Land Conservation Committee, the State District Fish and Game Manager, or the State District Forester, as appropriate, review any vegetation cutting, clearing, or earth moving associated with the subdivision. (2008 code § 18.09(14))