A. 
Compliance with statutes. In laying out a subdivision, the owner shall conform to the provisions of Ch. 236, Wis. Stats., and all applicable Town regulations. In all cases where the requirements of this chapter are different from the requirements of Ch. 236, the more restrictive provision shall apply.
B. 
Dedication. The subdivider shall dedicate land and improve streets as provided in this chapter and § 490-22. Streets shall be located with due regard for topographical conditions, natural features, existing and proposed streets, utilities and land uses and public convenience and safety. Streets shall conform to Official Maps adopted by the Town Board. The subdivision, certified survey parcel or land division shall be so designed as to provide each lot with satisfactory access to a public street or road.
C. 
Compliance with Comprehensive Plan. The arrangement, character, extent, width, grade and location of all streets shall conform to any Town Comprehensive Plan or Official Map and to this chapter and shall be considered in their relation to existing and planned streets, to reasonable circulation of traffic, to topographical conditions, to runoff of stormwater, to public convenience and safety, and in their appropriate relation to the proposed uses of the land to be served by such streets. The arrangement of streets in new subdivisions shall make provision for the appropriate continuation at the same width of the existing streets in adjoining areas.
D. 
Areas not covered by plan. In areas not covered by a Town Comprehensive Plan, or Official Map, the layout of streets shall conform to the plan for the most advantageous development of adjoining areas of the neighborhood. Streets shall be designed and located in relation to existing and officially planned streets, topography and natural terrain, streams and lakes and existing tree growth, public convenience and safety and in their appropriate relation to the proposed use of the land to be served by such streets.
E. 
Street classifications. Streets shall be classified as indicated below.
(1) 
Arterial streets. Arterial streets shall be arranged to provide through traffic for a heavy volume of vehicles.
(2) 
Collector streets. Collector streets shall be arranged so as to provide ready collection of traffic from commercial and residential areas and conveyance of this traffic to the major street and highway system and shall be properly related to special traffic generators such as schools, churches and shopping centers and other concentrations of population and to the major streets into which they feed.
(3) 
Minor streets. Minor streets shall be arranged to conform to the topography, to discourage use by through traffic, to permit the design of efficient storm and sanitary sewerage systems and to require the minimum street area necessary to provide safe and convenient access to abutting property.
(4) 
Proposed streets. Proposed streets shall extend to the boundary lines of the tract being subdivided unless prevented by topography or other physical conditions or unless, in the opinion of the Town Board, such extension is not necessary or desirable for the coordination of the layout of the subdivision or land division or for the advantageous development of the adjacent tracts.
F. 
Reserve strips. 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 Town under conditions approved by the Town Board.
G. 
Alleys. Alleys may be provided in commercial and industrial districts for off-street loading and service access, but shall not be approved in residential districts. Dead-end alleys shall not be approved and alleys shall not connect to a major thoroughfare or federal, state or county trunk highway.
H. 
Continuation. Streets shall be laid out to provide for possible continuation wherever topographic and other physical conditions permit. Provision shall be made so that all proposed streets shall have a direct connection with, or be continuous and in line with, existing, planned or platted streets with which they are to connect. Proposed streets shall be extended to the boundary lines of the tract to be subdivided, unless prevented by topography or other physical conditions, or unless in the opinion of the Town Board, upon the recommendation of the Plan Commission, such extension is not necessary or desirable for the coordination of the layout of the subdivision with existing layout or the most advantageous future development of adjacent tracts. Dead-end streets not over 500 feet in length will be approved when necessitated by the topography.
I. 
Minor streets. Minor streets shall be so laid out so as to discourage their use by through traffic.
J. 
Number of intersections. The number of intersections of minor streets with major streets shall be reduced to the practical minimum consistent with circulation needs and safety requirements, preferably not more than two. Wherever practicable, the distance between such intersections should not be less than 1,320 feet.
K. 
Frontage roads. Where a subdivision abuts or contains an existing or proposed arterial highway, the Town Board may require a frontage road, nonaccess reservation along the rear of the property contiguous to such highway or such other treatment as may be necessary to ensure safe, efficient traffic flow and adequate protection of residential properties.
L. 
Private streets. Private streets shall not be approved nor shall public improvements be approved for any private street; all streets shall be dedicated for public use.
M. 
Visibility. Streets shall afford maximum visibility and safety and shall intersect at right angles where practicable. As required by the Town Engineer, sufficient vision clearance triangles shall be provided at intersections.
N. 
Tangents. A tangent at least 100 feet long shall be required between reverse curves on arterial and collector streets. Whenever there is a deflection angle of more than 10° in the alignment of a street, a curve shall be introduced with the required radius.
O. 
Street grades.
(1) 
Unless necessitated by exceptional topography subject to the approval of the Town Board, 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) 
Pedestrian ways: 8% unless steps of acceptable design are provided.
(e) 
The grade of any street shall in no case exceed 12% or be less than 1/2 of 1%.
(2) 
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.
P. 
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 said center line of not less than the following:
(1) 
Arterial streets and highways: 350 feet.
(2) 
Collector streets: 200 feet.
(3) 
Minor streets: 150 feet.
Q. 
Half streets. Where an existing dedicated or platted half-street is adjacent to the subdivision, the other half-street shall be dedicated by the subdivider. The platting of half-streets should be avoided where possible.
R. 
Intersections.
(1) 
Property lines at street intersections of major thoroughfares shall be rounded with a radius of 15 feet or of a greater radius where the Town Engineer considers it necessary.
(2) 
Streets shall intersect each other at as nearly right angles as topography and other limiting factors of good design permit.
(3) 
Number of streets converging at one intersection shall be reduced to a minimum, preferably not more than two.
S. 
Street names. New street names shall not duplicate the names of existing streets, but streets that are continuations of others already in existence and named shall bear the names of the existing streets. Street names shall be subject to approval by the Town Board.
T. 
Culs-de-sac.
(1) 
Culs-de-sac. Cul-de-sac streets designed to have one end permanently closed shall not exceed 500 feet in length. All cul-de-sac streets designed to have one end permanently closed shall terminate in a circular turnaround having a minimum right-of-way radius of 66 feet and a minimum inside curb radius of 40 feet. The use of culs-de-sac should be avoided where possible and are allowed only where specifically permitted by the Town Board.
(2) 
Temporary dead-ends or culs-de-sac. All temporary dead-ends shall have a maximum length of 800 feet and a temporary cul-de-sac shall have a minimum right-of-way radius of 66 feet and a minimum inside curb radius of 40 feet.
U. 
Limited access highway and railroad right-of-way treatment. Whenever the proposed subdivision contains or is adjacent to a limited access highway, arterial street or railroad right-of-way, the design shall provide the following treatment:
(1) 
Subdivision lots. When lots within the proposed subdivision back up on the right-of-way of an existing or proposed limited access highway 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; the building of structures hereon prohibited."
(2) 
Commercial and industrial districts. Commercial and industrial districts shall have provided, on each side of the limited access highway, arterial street 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 not less than 150 feet.
(3) 
Streets parallel to a limited access highway. Streets parallel to a limited access highway or railroad right-of-way, when intersecting a major street and highway or collector street which crosses said railroad or highway, shall be located at a minimum distance of 250 feet from said highway or railroad right-of-way. Such distance, where desirable and practicable, shall be determined with due consideration of the minimum distance required for the future separation of grades by means of appropriate approach gradients.
(4) 
Minor streets. 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 to railroad rights-of-way shall be avoided in residential areas.
A. 
General requirements.
(1) 
Construction standards. All roadway construction and materials used shall be performed in accordance with the construction methods as listed in the appropriate sections of the "State of Wisconsin Department of Transportation Standard Specifications for Road and Bridge Construction" and its supplements, and this chapter, whichever is more restrictive. The design requirements of this section and § 490-33 shall be applicable to all streets and roads that are to be dedicated to the Town regardless of whether such streets or roads are part of a new subdivision or land division.
(2) 
Project costs. All roadway surveys, dedications, plans and specifications and construction will be at the expense of the applicant or applicants. This includes any expense incurred by the Town in the preparation of plans and review and inspection of plans and construction.
(3) 
Preliminary consultation. Prior to the design, preparation and construction of any roadway to be dedicated to the Town of Koshkonong, the applicant shall notify the Town Clerk. An on-site meeting will then be arranged to be attended by the Town Engineer and/or Town Board and the applicant. Plans must be provided in order for the Town Engineer and/or Town Board to check the design and the drainage.
(4) 
Material slips. Copies of material slips for all materials furnished for the road construction projects shall be delivered to the Town before the Town approves the final construction.
(5) 
Required inspections.
(a) 
Although the Town Engineer and/or Town Board may conduct inspections as necessary at any state of construction, the Town Engineer and/or Town Board shall be contacted for required inspections after the following phases of construction:
[1] 
Subbase grading;
[2] 
Crushed aggregate base courses;
[3] 
Bituminous surface course;
[4] 
Shouldering; and
[5] 
Placement of erosion control measures (soil stabilization and stormwater retention/detention measures).
B. 
Any deficiencies found by the Town Engineer and/or Town Board shall be corrected before proceeding to the next phase of construction.
(1) 
Tests of materials. The Town reserves the right to obtain a sample of the roadway base material prior to placement on the roadway for purposes of determining whether the material meets gradation and soundness requirements.
(2) 
Pavement samples. Samples of bituminous concrete may be required to be taken by the Town at the developer's expense during pavement construction operations for purposes of determining that the material meets specifications.
(3) 
Town board approval. The finished roadway shall meet with the approval of the Town Board, upon the recommendation of the Town Engineer, since the Town will include this road work in their annual request for highway aid.
C. 
Construction standards. After completion of the underground utilities and approval thereof, the streets shall be constructed. Unless phasing of construction of improvements is approved by the Town Board or its designee, building permits shall not be issued prior to the installation of the street improvements and the approval of an individual lot grading plan that conforms to the guidelines of the master site grading plan, as determined by the Town Board and/or Town Engineer, or his designee. All streets and highways constructed in the Town or to be dedicated to the Town shall fully comply with the following construction standards, except to the extent that state standards are more stringent, in which case those standards apply:
Urban Cross Section
Type of Street* *
Right-of-Way Width to Be Dedicated
Statewide principal primary or standard arterial streets
180 feet
Statewide minor arterial or area wide high or low collectors
100 feet
Local Streets
66 feet
Pedestrian Ways
12 feet***
Type of Street* *
Pavement Width (Face of Curb to Face of Curb)
Statewide Principal Primary or Standard Arterial Streets
*
Statewide Minor Arterial or Area wide High or Low Collectors
*
Local Streets
32 feet
Pedestrian Ways
6 feet***
Rural Cross Section
Type of Street**
Right-of-Way Width to Be Reserved or Dedicated
Statewide Principal, Primary, Standard, Arterial
*
Local Street
66 feet
Area wide High and Low Collectors
100 feet
Type of Street**
Pavement Width (Edge to Edge)
Statewide principal, primary, standard arterial
*
Local street
66 feet
Area-wide high and low collectors
100 feet
Type of Street* *
Pavement Width (Edge to Edge)
State-wide principal, primary, standard, arterial
*
Area-wide high and low collectors
*
Local streets and town roads
22 feet
*
To be determined by the Town Board with advice from the Highway Commissioner.
**
From Page 30 of the Jurisdictional Highway Planning Study For Jefferson County, Wisconsin, 1970, and Candeub, Fleissig and Associates.
***
The construction standards for pedestrian ways may be modified by obtaining a variance from the Town Board.
(1) 
Roadway alignment details. As specified in the Jefferson County Code of Ordinances.
(2) 
Roadway grading; ditches. Roads shall be graded to their full width in accordance with approved plans, plus an additional distance necessary to establish a 4:1 back slope. The roadway shall be compacted and graded to subgrade using, where necessary, approved fill material which is in accordance with Wisconsin Department of Transportation standards. Roadside ditches shall be a minimum of 26 inches below the finished roadway center line elevation, or as approved by the Town Board, upon the recommendation of the Town Engineer. Debris may not be buried in the designated road right-of-way. Roadway ditches shall have a normal slope ratio of 3:1 ditch from the edge of the shoulder to the bottom of the ditch slope of 1% and 2:1 on the back slope.
(3) 
Concrete curbing. When deemed necessary due to the physical characteristics of the site, the Town Board may require the installation of concrete curbing, at the cost of the subdivider, as an alternative to the use of roadway ditches.
(4) 
Roadway base thickness.
(a) 
Residential and rural roads and streets shall have a minimum roadway base thickness of 12 inches of compacted in-place crushed aggregate base course of gradation No. 2 in the top layer and gradations No. 1 and No. 2 in the lower level.
[Amended 3-13-2019 by Ord. No. 1]
(b) 
On commercial, arterial or other heavy-use roads, as determined by the Town Board, a base course of 12 inches compacted shall be constructed upon an inspected and approved subgrade, either well-graded crushed gravel from a state-approved pit with a maximum stone of 1 1/2 inches and no greater than 10% by weight passing a No. 200 sieve or No. 3 crushed rock approximately six inches in depth and one or more layers of fine aggregate, either 3/4-inch crushed gravel, well-graded with no greater than 10% passing a No. 200 sieve, or 3/4 inch-traffic-bound crushed rock.
[Amended 3-13-2019 by Ord. No. 1]
(c) 
In the case of commercial, arterial or other heavy-use roads, the Town Board may, in the alternative to the above standards, have the Jefferson County Highway Department and/or Town Engineer provide specifications for such roads after researching the site(s) and conducting a soil analysis.
(d) 
In any case, the Town Board shall have the sole discretion in determining the use and construction classification to be adhered to.
(e) 
In all cases, the base course shall be compacted to the extent necessary to produce a condition so that there will be no appreciable displacement of material laterally and longitudinally under traffic and shall conform to line, grades and shape shown on the approved plans, profiles and cross sections.
(5) 
Roadway subgrade quality.
(a) 
All subgrade material shall have a minimum California Bearing Ratio (CBR) of three. Subgrade material having a CBR less than three shall be removed and replaced with a suitable fill material, or the pavement must be designed to compensate for the soil conditions. The soil support CBR values selected for use by the designer should represent a minimum value for the soil to be used.
(b) 
Stable and nonorganic subbase material is required. All topsoil shall be first removed. In addition, all subsoils which have a high shrink-swell potential, low-bearing capacity when wet, or are highly elastic shall be removed and used outside of the right-of-way. Where both subsoil and substratum have a high shrink-swell potential and low bearing capacity when wet, an under-drain system shall be installed to keep the water level five feet below the pavement surface. Unstable and organic material must be subcut, removed and replaced with a suitable granular or breaker-run material approved by the Town Engineer and/or Town Board.
(6) 
Pavement width. Minimum of 36 feet gutter edge to gutter edge for urban service area minor streets, 40 feet gutter edge to gutter edge for collector streets or streets serving commercial or industrial areas, 22 feet for rural roads, without curb and gutter, and wider when required by the "Town Road Standards" as noted § 82.50, Wis. Stats., or by the Town Subdivision Ordinance, the more restrictive of which shall apply. Rural roads shall comply with the specifications for urban service area minor streets if they are located in an area that in the Town Board's opinion might be annexed to an urban service area within five years.
(7) 
Pavement thickness. Residential and rural roads shall have a minimum of three inches thick compacted bituminous concrete pavement, placed in two layers — a binder course of 1 1/2 inches thick and a surface course of 1 1/2 inch. On commercial, arterial or other heavy-use roads, there shall be a minimum of 3 1/2 inches of bituminous concrete pavement, placed in two layers — a binder course of two inches thick and a surface course of 1 1/2 inches thick. In the case of commercial, arterial or other heavy-use roads, the Town Board may, in the alternative to the above standards, have the Jefferson County Highway Department and/or Town Engineer and/or Town Board provide specifications for paving such roads after researching the site(s) and conducting a soil analysis. In any case, the Town Board shall have the sole discretion in determining the use and construction classification to be adhered to.
(8) 
Shoulder width. Minimum of two feet wide on each side and wider when required by the "Town Road Standards" as noted in § 82.50, Wis. Stats.
(9) 
Shoulder thickness. Minimum of 2 1/2 inches of compacted in-place crushed aggregate base course — gradation No. 2 or No. 3 over a minimum of eight inches of compacted in-place crushed aggregate base course.
(10) 
Roadway culverts and bridges. Roadway culverts and bridges shall be constructed as directed by the Town Engineer and sized utilizing the TR 55 standards listed in Ch. 13, entitled "Drainage," of the "Facilities Development Manual" of the Wisconsin Department of Transportation. All roadway culverts shall be provided with concrete or metal apron end walls.
(11) 
Driveway culverts. The culverts shall be placed in the ditch line at elevations that will assure proper drainage, and they shall be provided with concrete, plastic, metal or landscape timber end walls.
[Amended 3-13-2019 by Ord. No. 1]
(12) 
Topsoil, grass, seed, fertilizer and mulch. All disturbed areas (ditches, back slopes) within the road right-of-way not provided with pavement and shouldering material shall be restored utilizing four inches of topsoil and good quality seed, fertilizer and mulch in accordance with the seeding requirements in Wisconsin Department of Transportation Standards. Ditches along the roadway shall be protected by necessary erosion control materials such as hay bales, sod, erosion control mats, etc., as prescribed by the engineering design for the ditches as approved by the Town Engineer and/or Town Board.
(13) 
Extra turn surface. The radius required shall be 25 feet for minor/local streets; heavy traffic/collector street radius shall follow manual standards.
(14) 
Drainage improvements. In the case of all new roads and streets, the Town Engineer and/or Town Board may require that stormwater retention areas and storm sewers be constructed in order to provide for proper drainage.
(15) 
Post-construction traffic limited. No vehicular traffic shall be permitted on the pavement for a minimum period of between 24 and 72 hours following paving, as determined necessary by the Town Engineer to protect the new pavement.
D. 
Statutory requirements. The laying out of highways and roads shall be as provided in Chs. 82 through 86, Wis. Stats., except that in the case of subdivisions and certified surveys, the provisions of § 236.29(2), Wis. Stats., shall apply.
E. 
Bond; final inspection.
(1) 
Upon completion of the proposed highway, the Town Engineer and/or Town Board will proceed to make final inspection, accepting or rejecting the road as the case may be. After all of the provisions of this chapter have been complied with, the roadway or easement will be inspected by the Town officials and, at that time, proof will be made by the presenting of waivers of liens or receipted bills that all work that has been done has been paid for or arrangements have been made for the payment through written instrument by the subdivider. If the road is rejected, corrections shall be made as recommended by the Town Board, upon the Town Engineer's recommendation, before final inspection can then be made again. If final acceptance is then made, the owner or owners shall turn over to the Town the deed of all land necessary for the road as previously mentioned.
(2) 
The subdivider shall be responsible for one year from the date of the completion of the work required by this chapter and shall file a written guarantee or surety bond to that effect with the Town in an amount determined by the Town Board.
(3) 
Whenever the Town Board shall find that any such work has become defective within one year of the date of completion, it shall give written notice thereof to the subdivider or to his/her surety stating the defect, the work to be done, the cost thereof and the period of time deemed by the Town Board to be reasonably necessary to complete said work. After receipt of such notice, the subdivider or the surety must, within the time specified, repair the defect or indemnify the Town for the cost of doing the work as set forth in the notice.
F. 
If the construction standards required by the state are more stringent than the requirements set forth herein, the state standards shall be applicable.
A. 
Length; arrangement. The lengths, widths and shapes of blocks shall be appropriate for the topography and the type of development contemplated, but block length in residential areas shall not exceed 1,500 feet nor have less than sufficient width to provide for two tiers of lots of appropriate depth between street lines. As a general rule, blocks shall not be less than 750 feet in length. Blocks shall be so designated as to provide two tiers of lots, unless it adjoins a railroad, major thoroughfare, river or park where it may have a single tier of lots.
B. 
Pedestrian pathways. Pedestrian pathways, not less than 12 feet wide, may be required by the Town Board, upon the recommendation of the Plan Commission, through the center of a block more than 900 feet long, where deemed essential to provide circulation or access to schools, playgrounds, shopping centers, transportation and other community facilities.
A. 
Size.
(1) 
Access. Every lot shall front or abut on a public street for a distance of at least 66 feet. In unique hardship cases where it is impossible for a lot to abut a public street, a private way may be used for access purposes provided a statement is included on the face of the plat indicating that the lot is served by a private way and that the Town or County has no responsibility for the maintenance of the private way. Any such private way is subject to applicable County zoning or platting ordinances, if any.
(2) 
Area and dimensions of lots shall conform to the requirements of the Wisconsin Administrative Code and the applicable zoning code requirements.
[Amended 3-13-2019 by Ord. No. 1]
(3) 
Area.
(a) 
Sewered lots shall have a minimum of 30,000 square feet, unless otherwise provided by applicable Town or County Zoning ordinances.
[Amended 3-13-2019 by Ord. No. 1]
(b) 
Lot areas in rural subdivisions not served by public sewers shall be sized according to said suitability and the need for mounded septic treatment, as follows:
[1] 
Entire septic field and tank installed without changing existing prior contours. Minimum lot area: 30,000 square feet.
[2] 
Subsoil conditions require additional fill above prior ground elevations or mounding of zero to four feet. Minimum lot area: 40,000 square feet.
[3] 
Subsoil conditions require mounded systems mounded or filled more than four feet above prior surface elevations. Minimum lot area: 1.25 acres.
(c) 
Whenever a tract is subdivided into large parcels, such parcels may be arranged and dimensioned so as to allow further division of those parcels into normal lots if and when those lots become sewered, in accordance with the provisions of this chapter.
(d) 
Deed restrictions may be required to regulate the placement of buildings on these lots.
B. 
Soil testing. For unsewered plats of 10 lots or less, every lot must be fully tested, with the septic systems located and shown on, or with the preliminary plat. For plats of more than 10 lots, every third lot must be fully tested, as that then is defined by applicable Jefferson County ordinance or state requirements.
C. 
Depth. Lots shall have a minimum depth of 100 feet. Depth of lots or parcels reserved for commercial or industrial use shall be adequate to provide for screened, off-street service and parking required by the use contemplated, and the area zoning regulations for such use. An extra 10 feet in depth and width may be required for said lots to be restricted for planting of shrubs and trees to screen said parking or to screen proposed industrial lots.
D. 
Corner lots. Corner lots for residential use shall have extra width of 10 feet to permit building setback from both streets, as required by the Jefferson County Zoning Code.
E. 
Butt lots. Butt lots will be permitted by the Town Board only in exceptional cases. Permitted butt lots shall be platted at least five feet wider than the average width of interior lots in the block.
F. 
Side lots. Side lot lines shall be substantially at right angles to or radial to abutting street lines. Lot lines shall follow Town boundary lines.
G. 
Double and reversed frontage lots. Double frontage and reversed frontage lots shall be avoided except where necessary to provide separation of residential development from traffic arteries or to overcome specific disadvantages of topography and orientation.
H. 
Natural features. In the subdividing of any land, regard shall be shown for all natural features, such as tree growth, watercourses, historic spots or similar conditions which, if preserved, will add attractiveness and stability to the proposed development.
I. 
Land remnants. All remnants of lots below minimum size left over after subdividing of a larger tract must be added to adjacent lots, or a plan shown as to future use rather than allowed to remain as unusable parcels.
J. 
Building setback lines. Building setback lines shall conform to the requirements which may be established in a Town Building Ordinance, but shall not be less than those established by Jefferson County Building or Zoning Ordinances. Where not otherwise controlled by ordinance, setback lines appropriate to the location and type of development contemplated shall be established as may be required by the Town Board or County planning agency, to achieve the purpose and intent of this chapter.
A. 
Drainage system required. As required by § 490-27, a drainage system shall be designed and constructed by the subdivider to provide for the proper drainage of the surface water of the subdivision and the drainage area of which it is a part. A final plat shall not be approved until the subdivider shall submit plans, profiles and specifications as specified in this section, which have been prepared by a registered professional engineer and approved by the Town Board, upon the recommendations of the Plan Commission and Town Engineer.
B. 
Drainage system plans.
(1) 
The subdivider shall submit to the Town at the time of filing a preliminary plat a preliminary drainage plan or engineering report on the ability of existing watercourse channels, storm sewers, culverts and other improvements pertaining to drainage or flood control within the subdivision to handle the additional runoff which would be generated by the development of the land within the subdivision. Additional information shall be submitted to adequately indicate that provision has been made for disposal of surface water without any damage to the developed or undeveloped land downstream or below the proposed subdivision. The report shall also include:
(a) 
Estimates of the quantity of stormwater entering the subdivision naturally from areas outside the subdivision.
(b) 
Quantities of flow at each inlet or culvert.
(c) 
Location, sizes and grades of required culverts, storm drainage sewers and other required appurtenances.
(2) 
A grading plan for the streets, blocks and lots shall be submitted by the subdivider for the area within the subdivision.
(3) 
The design criteria for storm drainage systems shall be based upon information provided by the Town Engineer.
(4) 
Material and construction specifications for all drainage projects (i.e., pipe, culverts, seed, sod, etc.) shall be in compliance with specifications provided by the Town Board, upon the recommendation of the Town Engineer.
C. 
Grading. The subdivider shall grade each subdivision in order to establish street, block and lot grades in proper relation to each other and to topography as follows:
(1) 
The subdivider shall grade the full width of the right-of-way of all proposed streets in accordance with the approved plans.
(2) 
Block grading, including use of culverts, shall be completed by one or more of the following methods:
(a) 
A ridge may be constructed along the rear lot lines which provides for drainage onto the streets. However, there shall be no on-street drainage.
(b) 
Parts of all lots may be graded to provide for drainage to the street or to a ditch along the rear lot line.
(c) 
Draining across rear or side lot lines may be permitted, provided that drainage onto adjoining properties is skillfully controlled.
D. 
Drainage system requirements. The subdivider shall install all the storm drainage facilities indicated on the plans required in Subsection A of this section.
(1) 
Street drainage. All streets shall be provided with an adequate storm drainage system. The street storm system shall serve as the primary drainage system and shall be designed to carry street, adjacent land and building stormwater drainage. No stormwater shall be permitted to be run into a sanitary sewer system within the proposed subdivision.
(2) 
Off-street drainage. The design of the off-street drainage system shall include the watershed affecting the subdivision and shall be extended to a watercourse or ditch adequate to receive the storm drainage. When the drainage system is outside of the street right-of-way, the subdivider shall make provisions for dedicating an easement of the Town to provide for the future maintenance of said system. Easements shall be a minimum of 20 feet, but the Town may require larger easements if more area is needed due to topography, size of watercourse, etc.
E. 
Protection of drainage systems. The subdivider shall adequately protect all ditches to the satisfaction of the Town Board and Town Engineer. Ditches and open channels shall be seeded, sodded or paved depending upon grades and soil types. (Generally ditches or channels with grades up to 1% shall be seeded; those with grades up to 4% shall be sodded and those with grades over 4% shall be paved.)
F. 
Developer and/or association shall maintain drainage system. If they fail to adequately maintain the drainage system, the Town shall do the necessary maintenance and charge the actual cost to the property owners.
[Added 3-13-2019 by Ord. No. 1]
A. 
General.
(1) 
If a proposed subdivision includes land that is zoned for commercial or industrial purposes, the layout of the subdivision with respect to such land shall make such provisions as the Town may require.
(2) 
A nonresidential subdivision shall also be subject to all the requirements of site plan approval set forth in the Town Building Code. A nonresidential subdivision shall be subject to all the requirements of this chapter, as well as such additional standards required by the Town and shall conform to the proposed land use standards established by any Town Comprehensive Plan or the Jefferson County Zoning Code.
B. 
Standards. In addition to the principles and standards in this chapter, which are appropriate to the planning of all subdivisions, the applicant shall demonstrate to the satisfaction of the Town Board that the street, parcel and block pattern proposed is specifically adapted to the uses anticipated and takes into account other uses in the vicinity. The following principles and standards shall be observed:
(1) 
Proposed industrial parcels shall be suitable in area and dimensions to the types of industrial development anticipated.
(2) 
Street rights-of-way and pavement shall be adequate to accommodate the type and volume of traffic anticipated to be generated thereupon.
(3) 
Special requirements may be imposed by the Town Board with respect to street, curb, gutter and sidewalk design and construction.
(4) 
Special requirements may be imposed by the Town Board with respect to the installation of public utilities, including water, sewer and stormwater drainage.
(5) 
Every effort shall be made to protect adjacent residential areas from potential nuisance from a proposed commercial or industrial subdivision, including the provision of extra depth in parcels backing up on existing or potential residential development and provisions for permanently landscaped buffer strips when necessary.
(6) 
Streets carrying nonresidential traffic, especially truck traffic, shall not normally be extended to the boundaries of adjacent existing or potential residential areas.