A. 
Arrangement. In any new subdivision the street, block and lot layouts shall conform to the arrangement, width and location indicated on the City Official Map, county jurisdictional highway system plan, comprehensive plan or plan component or neighborhood development plan, if any, of the City, town or county and shall be so designated as to be within the capability of the land and water resources; least disturb the existing terrain, flora, fauna and water regimen; and meet all the use, site, sanitary, floodland and shoreland regulations contained in the City Zoning Code and the Waukesha County Community Health Code. In areas for which such plans have not been completed, the street layout shall recognize the functional classification of the various types of streets and shall be developed and located in proper relation to existing and proposed streets, to the topography, to such natural features as streams and tree growth, to public convenience and safety, to the proposed use of the land to be served by such streets and to the most advantageous development of adjoining areas. The subdivision shall be designed so as to provide each lot with satisfactory solar access and access to a public street.
(1) 
Arterial streets, as defined in § 392-8, shall be arranged so as to provide ready access to centers of employment, centers of governmental activity, community shopping areas, community recreation and points beyond the boundaries of the community. Arterial streets shall also be properly integrated with and related to the existing and proposed area-wide system of arterial streets and highways and shall be, insofar as practicable, continuous and in alignment with existing or planned streets with which they are to connect.
(2) 
Collector streets, as defined in § 392-8, shall be arranged so as to provide ready collection of traffic from residential areas and conveyance of this traffic to the arterial street and highway system and shall be properly related to the mass transportation system, to special traffic generators such as schools, churches and shopping centers and other concentrations of population and to the arterial streets into which they connect.
(3) 
Minor streets, as defined in § 392-8, shall be arranged to conform to the topography, discourage use by through traffic, permit the design of efficient storm and sanitary sewerage systems and require the minimum street area necessary to provide safe and convenient access to abutting property.
(4) 
Proposed streets shall extend to the boundary lines of the tract being subdivided unless prevented by topography or other physical conditions or unless the City Plan Commission finds that such extension is not necessary or desirable for the coordination of the layout of the subdivision or for the advantageous development of the adjacent tracts.
(5) 
Arterial street and highway protection. Whenever the proposed subdivision contains or is adjacent to an arterial street or highway, adequate protection of residential properties, limitation of access and separation of through and local traffic shall be provided by reverse frontage with screen planting contained in a non-access reservation along the rear property line or by the use of frontage streets consistent with Subsection B(1) of this section.
(6) 
Public access shall be provided to all navigable stream or lake shores. Such access shall be at least 60 feet in width platted to the low-water mark at intervals of not more than 1/2 mile as required by § 236.16(3), Wis. Stats., unless greater intervals and wider access are agreed upon by the City Plan Commission, the Wisconsin Department of Natural Resources and the Department of Administration. All platted public access shall front on a public street, highway, parkway or other public way.[1]
[1]
Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. II).
(7) 
Reserve strips shall not be provided on any plat to control access to streets or alleys, except where control of such strips is placed with the City under conditions approved by the Plan Commission.
(8) 
Street names shall not duplicate or be similar to existing street names, and existing street names shall be projected wherever possible. Final approval of street names rests with the Common Council, upon recommendation of the Plan Commission, Public Works and Safety Committee and Police Department.
(9) 
Access shall be provided in commercial and industrial areas for off-street loading and service areas unless otherwise required by the Plan Commission.
B. 
Limited access highway and railroad right-of-way treatment. Whenever the proposed subdivision contains or is adjacent to a limited access highway, arterial or railroad right-of-way, the design shall provide the following treatment:
(1) 
When lots within the proposed subdivision back upon the right-of-way of an existing or proposed limited access highway, arterial or a railroad, a planting strip at least 30 feet in depth shall be provided adjacent to the highway or railroad in addition to the normal lot depth. This strip shall be part of the platted lots but shall have the following restriction lettered on the face of the plat: "This strip reserved for the planting of trees and shrubs and the building of all structures excepting public or private utility structures hereon is prohibited."
(2) 
Where commercial and industrial districts are involved there shall be provided, on each side of the limited access highway or railroad, streets approximately parallel to and at a suitable distance from such highway or railroad for the appropriate use of the land between such streets and highway or railroad, but shall not be less than 150 feet from the right-of-way of the limited access highway or railroad.
(3) 
Streets parallel to a limited access highway or railroad right-of-way, when intersecting a major street and highway or collector street which crosses a railroad or highway, shall be located at a minimum distance of 250 feet from the highway or railroad right-of-way. Such distance, where desirable and practicable, shall be determined with due consideration of the minimum distance required for future separation of grades by means of appropriate approach gradients.
(4) 
Minor streets immediately adjacent and parallel to railroad rights-of-way shall be avoided, and location of minor streets immediately adjacent to arterial streets and highways and railroad rights-of-way shall be avoided in residential areas.
C. 
Street and pedestrianway design standards.
(1) 
Minimum standards. The minimum right-of-way, construction standards and roadway width of all proposed streets and alleys shall be as specified by the City's standard specifications, Comprehensive Plan, Comprehensive Plan component, Official Map or neighborhood development plan or county jurisdictional highway system plan or, if no width is specified therein, the minimum width shall be as shown on Table 1 below.
(2) 
Existing rural right-of-way. The suggested right-of-way widths indicated above are for urban sections; no rural sections are to be used. However, in the case of existing rural-type roadway sections, right-of-way widths shall be as follows:
Table 1
Right-of-Way Width
(feet)
Urban Street
Arterial
100 (minimum)
Collector
80
Minor
60
Pedestrianway
10
Rural Street
Arterial
100 (minimum)
Collector
80
Minor
60
(3) 
Other requirements. Street sections are for standard streets only. Cross sections for freeways, expressways and parkways should be based upon detailed engineering studies. In addition:
(a) 
Cul-de-sac streets. Cul-de-sac streets designed to have one end permanently closed shall not exceed 1,320 feet in length. Urban cul-de-sac streets shall typically terminate in a tear-drop turnaround having a minimum right-of-way radius of 60 feet and a minimum outside curb radius of 48 feet.
(b) 
Street grades.
[1] 
Unless necessitated by exceptional topography, subject to the approval of the Common Council, the maximum center-line grade of any street or public way shall not exceed the following:
[a] 
Arterial streets: 6%.
[b] 
Collector streets: 8%.
[c] 
Minor streets, alleys and frontage streets: 10%.
[d] 
Pedestrianways: 12%, unless steps of acceptable design are provided.
[2] 
The grade of any street shall in no case exceed 12% or be less than 1/2 of 1%.
(4) 
Street grades. Street grades shall be established wherever practicable so as to avoid excessive grading, the promiscuous removal of ground cover and tree growth, and general leveling of the topography. All changes in street grades shall be connected by vertical curves of a minimum length equivalent in feet to 30 times the algebraic difference in the rates of grade for arterial streets and 1/2 this minimum for all other streets.
(5) 
Half streets. Where an existing dedicated or platted half street is adjacent to the tract being subdivided, the other half of the street shall be dedicated by the subdivider. The platting of new half streets shall not be permitted.
(6) 
Roadway elevations. Elevations of roadways passing through floodland areas shall be designed in the following manner:
(a) 
At least two feet above the one-hundred-year recurrence interval flood elevation for arterial streets.
(b) 
At least two feet above the ten-year recurrence interval flood elevation for minor streets.
(c) 
At no less than the one-hundred-year recurrence interval flood elevation for collector streets.
(7) 
New and replacement bridges and culverts. All new and replacement bridges and culverts over perennial waterways, including pedestrian and other minor bridges, in addition to meeting other applicable requirements, shall be designed so as to accommodate the one-hundred-year recurrence interval flood event without raising the peak stage, either upstream or downstream, more than 0.01 foot above the peak stage for the one-hundred-year recurrence interval flood, as established in the applicable federal Flood Insurance Study or other technical study. Larger permissible flood stage increases may be acceptable for reaches having topographic land use conditions which could accommodate the increased stage without creating additional flood damage potential upstream or downstream of the proposed structure, provided that flood easements or other appropriate legal measures have been secured from all property owners affected by the excess stage increases. Such bridges and culverts shall be so designed and constructed as to facilitate the passage of ice floes and other debris. All new and replacement bridges shall be constructed in accordance with all applicable state statutes and codes, and plans shall be submitted to the Department of Natural Resources (DNR) to assure compliance therewith.
(8) 
Radii of curvature. When a continuous street center line deflects at any one point by more than 10°, a circular curve shall be introduced having a radius of curvature on the center line of not less than the following:
(a) 
Arterial streets and highways: 500 feet.
(b) 
Collector streets: 300 feet.
(c) 
Minor streets: 150 feet.
(d) 
The radius of curvature specified in the Wisconsin Department of Transportation Facilities Design Manual for the design speed of the facility. Use the greater of the number provided in the Facilities Design Manual or Subsection C(8)(a), (b) or (c). A tangent at least 100 feet in length shall be provided between reverse curves on arterial and collector streets.[2]
[2]
Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. II).
D. 
Street intersections. Streets shall intersect each other at as nearly right angles as topography and other limiting factors of good design permit. In addition:
(1) 
The number of streets converging at one intersection shall be reduced to a minimum, preferably not more than two.
(2) 
The number of intersections along arterial streets and highways shall be held to a minimum. Wherever practicable the distance between such intersections shall not be less than 1,200 feet.
(3) 
Property lines at intersections with collectors and arterial streets, as identified by the approved street and arterial system plan for the City of Muskego, shall be rounded with a minimum radius of 15 feet, or of a greater radius when required by the City Plan Commission, or shall be cut off by a straight line through the points of tangency of any arc having a radius of 45 feet.
(4) 
Minor streets shall not necessarily continue across arterial or collector streets, but if the center lines of such minor streets approach the arterial streets from opposite sides within 300 feet of each other, measured along the center line of the arterial or collector street, then the location shall be so adjusted that the alignment across the arterial or collector street is continuous and a jog is avoided.
(5) 
On all streets where sidewalks are required, ramps or openings to accommodate handicapped individuals or vehicles shall be provided in accordance with § 66.0909, Wis. Stats.
The widths, lengths and shapes of blocks shall be suited to the planned use of the land, zoning requirements, need for convenient access, control and safety of street traffic, topography, and solar access.
A. 
The lengths of blocks in residential areas shall not as a general rule be less than 600 feet nor more than 1,500 feet in length unless otherwise dictated by exceptional topography or other limiting factors of good design.
B. 
Pedestrianways of not more than 10 feet in width may be required where deemed necessary by the City Plan Commission to provide safe and convenient pedestrian circulation between the individual lots, streams, lake shores, park lands or other public areas or may be required near the center and entirely across any block where deemed essential by the City Plan Commission to provide adequate pedestrian circulation or access to schools, shopping centers, churches, parks, open spaces, or transportation facilities. The final plat shall contain a special restriction addressing by whom mid-block pedestrianways will be maintained.
C. 
The width of blocks shall be wide enough to provide for two tiers of lots of appropriate depth, except where otherwise required to separate residential development from through traffic. Width of lots or parcels reserved or laid out for commercial or industrial use shall be adequate to provide for off-street service and parking required by the use contemplated and the area zoning restrictions for such use.
D. 
Utility easements shall, where practical, be placed on mid-block easements along rear lot lines.
The size, shape and orientation of lots shall be appropriate for the location of the subdivision and for the type of development and use contemplated. The lots should be designed to provide an aesthetically pleasing building site and a proper architectural setting, and for solar access for the building contemplated. In addition:
A. 
Lines. Side lot lines shall be at right angles to straight street lines or radial to curved street lines on which the lots face. Lot lines shall follow municipal boundary lines rather than cross them.
B. 
Double frontage and reverse frontage. Double frontage and reverse frontage lots shall be prohibited except where necessary to provide separation of residential development from through traffic or to overcome specific disadvantages of topography and orientation.
C. 
Access. Every lot shall front or abut for a distance of a least 80 feet on a public street/right-of-way and be at least 45 feet on all proposed culs-de-sac.
[Amended 4-18-2013 by Ord. No. 1371]
D. 
Area and dimensions. Area and dimensions of all lots shall conform to the requirements of the City Zoning Code or zoning ordinance of the jurisdiction where the land division occurs, except that land divisions which occur within the ERS Existing Suburban Residence Districts or RL Lakeshore Residence Districts shall conform to the area and dimension requirements of a new conforming district appropriate to the surroundings as approved by the Plan Commission and Common Council. The Common Council determines these provisions are necessary to preserve the public health, safety, and morals because:
(1) 
The area and dimensions provided for the ERS and RL Zoning Districts were intended to accommodate the nature of existing developments, the majority of which pre-date the establishment of zoning codes. The area and dimensions provided by these districts are not intended to perpetuate high-density development opportunities.
(2) 
The provisions of the ERS Existing Suburban Residence Districts or RL Lakeshore Residence Districts would otherwise permit high-density development opportunities which are in conflict with the adopted comprehensive plans, which call for residential densities not to exceed 2.9 dwelling units per acre on lots of 15,000 square feet. The allowance for lots of 10,000 square feet in the RL District and 11,250 square feet in the ERS District has the effect of raising permitted densities to unacceptable levels.
(3) 
In addition to the area and dimension requirements above, those building sites not served by a public sanitary sewer system or other approved systems shall be sufficient to permit the use of an on-site soil absorption sewage disposal system designed in accordance with Ch. SPS 383, Wis. Adm. Code, and administered by Waukesha County.
E. 
Resubdivision. Whenever a tract is subdivided into parcels five acres or less in area and more than twice the minimum lot area required for the zoning district in which such parcel is located, the Plan Commission may require such parcels to be arranged and dimensioned so as to allow resubdivision of any such parcels in accordance with the provisions of this chapter and in conformance with Chapter 400, Zoning, of the City Code or County Zoning Ordinance.[1]
[1]
Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. II).
F. 
Depth. Depth of lots shall be a minimum of 100 feet. Excessive depth in relation to width shall be avoided and a proportion of two to one shall be considered a desirable ratio under normal conditions. Depth and width of lots or parcels reserved or laid out for commercial or industrial use shall be adequate to provide for off-street service and parking required by the use contemplated and the zoning restrictions for such use.
G. 
Extra depth. Double frontage and reverse frontage lots, where permitted to provide separation of residential development from through traffic or to overcome specific disadvantages of topography and orientation, shall provide an extra lot depth of 30 feet or landscaped buffering unless a greater depth is specified herein.
H. 
Water's edge. Lands lying between the meander line and the water's edge and any otherwise unplattable lands which lie between a proposed subdivision and the water's edge shall be included as part of lots, outlots or public dedications in any plat abutting a stream or lake.
I. 
Width. Width of lots shall conform to the requirements of Chapter 400, Zoning, or other applicable ordinance, and in no case shall a lot be less than 80 feet in width at the setback line for that specific zoning district.
[Amended 4-18-2013 by Ord. No. 1371]
J. 
Corner lots. Corner lots shall be designed and platted with at least 10 feet of extra width over and above the minimum required for the zoning district wherein located to permit adequate building setbacks from side streets, and access shall be restricted to the minor street.
K. 
The shape of lots shall generally be rectangular, with lots platted on culs-de-sac generally narrower at the street line than at the rear lot line.
A. 
Building setback lines, appropriate to the location and type of development contemplated, which are more or less restrictive than the regulations of the zoning district in which the plat is located may be required by the Plan Commission, if under planned development. Building setback lines, appropriate to the location and type of development contemplated, which are more restrictive than the regulations of the zoning district in which the plat is located may be required by the Plan Commission and shall be shown on the final plat or certified survey map. Examples of the application of this provision include requiring greater setbacks on cul-de-sac lots to achieve the necessary lot width at the setback line, requiring greater setbacks to conform to setbacks of existing adjacent development or setting special yard requirements to protect natural resource elements.
B. 
Shoreland-wetland and isolated wetland setbacks, in addition to those required by the City Zoning Code, may be required by the Plan Commission. See the Zoning Code for more details regarding the specific wetland protection offsets.
Special restrictions which are appropriate to the location or design of the land division may be required by the Plan Commission and shall be shown on the final plat or certified survey map. Examples of the application of this provision include access control along public ways, required planting and buffering strips, and prohibition of structures and vegetative clearing in environmentally significant lands.
A. 
Utility. The Plan Commission may require utility easements of widths deemed adequate for the intended purpose on each side of all rear lot lines and on each side of all side lot lines or across lots where necessary or advisable for electric power and communication facilities, storm and sanitary sewers, street trees, gas, water, streetlights and other utility lines and solar access. All easements shall be noted on the final plat followed by reference to the use or uses for which they are intended.
B. 
Drainage easements. Where a subdivision is traversed by a watercourse, drainageway channel or stream, an adequate easement shall be provided. The location, width, alignment, and improvement of such drainageway or easement shall be subject to the approval of the City Engineer, and parallel streets or parkways may be required in connection therewith. Where necessary, stormwater drainage shall be maintained by landscaped open channels of adequate size and grade to hydraulically accommodate maximum potential volumes of flow, subject to review and approval by the City Engineer. All easements shall be noted on the final plat followed by reference to the use or uses for which they are intended.
A. 
In the design of each land division, due consideration shall be given to the reservation of suitable sites of adequate area for future schools, parks, playgrounds, drainageways, environmental corridors and other public purposes. If designated on the Comprehensive Plan, Comprehensive Plan component, Official Map or component, or neighborhood development plan, if any, such areas shall be made a part of the plat as stipulated in § 392-15 of this chapter. If not so designated, consideration shall be given in the location of such sites to the preservation of scenic and historic sites, stands of fine trees, marshes, lakes and ponds, watercourses, watersheds and ravines.
B. 
Accordingly, each subdivider of land in the City shall, at the discretion and direction of the Plan Commission, either dedicate open space lands designated on the City Comprehensive Plan or plan component or reserve such open space lands and pay a fee or, where no open space lands are directly involved, pay a fee. The Plan Commission shall, at the time of reviewing the preliminary plat, condominium plat, or certified survey map, select one of the following options and record its selection in the minutes of the meeting at which the preliminary plat, condominium plat, or certified survey map is presented for approval (determinations, at the Plan Commission's discretion, may be made by the City's Parks and Conservation Committee when applicable):
[Amended 9-17-2009 by Ord. No. 1303]
(1) 
Dedication option. Whenever a proposed playground, park or other public open space land designated on the City's Comprehensive Plan, neighborhood unit development plan or other Comprehensive Plan component is encompassed, all or in part, within a tract of land to be subdivided by plat or certified survey map, the public lands shall be made a part of the plat and be dedicated to the public by the subdivider at the rate of 5% of the total net area of the subdivision for schools and 5% of the total net area for parks and 9.7% of the total net area for open space conservation.
(2) 
Park fee option. If the proposed land division does not encompass a proposed public park, parkway, open space conservation site or other open space lands, park dedication fees shall be imposed.
C. 
A park dedication fee shall be imposed on both residential and nonresidential properties and shall be paid to the City Treasurer at the time of the signing and recording of a certified survey map, final condominium plat, or final plat of the subdivision, or part thereof, in an amount as from time to time established by resolution of the Common Council to defray the impact the additional development and residences will have on City parks, the City trail system, and the preserving of the City's agricultural, natural and cultural resources within the City's park system. The amount of the fee shall be set by resolution from year to year and shall be applied on the basis of the total number of newly created residential dwelling units and newly created lots and per acre of developable land. Such fees collected by the City Treasurer under the provisions of this section shall be placed in two separate nonlapsing special funds for passive and active park improvement purposes. The funds shall be separated as established by resolution of Common Council. The funds shall be separate from the City general fund and such special funds shall be used exclusively for funding the acquisition or initial improvement of land for public parks as per Wisconsin state statute. The improvement of land for public parks means grading, landscaping, installation of utilities, construction of sidewalks, installation of playground equipment, and construction or installation of restroom facilities on land intended for public park purposes.