Any streets, sidewalk, water or sewer extension, or other improvements herein referred to installed in any street or public place must conform to the following minimum design.
(A) Streets.
(1) Primary collector streets shall have a width of 37 feet measured from back of curb to back of curb and shall have a crown of six inches. Minor streets shall have a width of 27 feet back to back of curb and a crown of four inches. Marginal access streets, when serving only the marginal access frontage, shall have a width of 20 feet from back of curb to back of curb and a crown of four inches. Cul-de-sacs shall be paved to a diameter of 81 feet back of curb to back of curb, and shall have a crown of ten inches. Cul-de-sacs shall be totally paved curb to curb.
(2) All streets shall be provided with Portland cement concrete combination curb and gutter of a design approved by the Village Engineer. Pre- molded bituminous expansion joints of the exact contour of the curb and gutter shall be provided at all points of curvature, centers of radius returns, and 30 feet on centers in the curb and gutter. All streets shall conform to the requirements of Chapter 7 in the Illinois Department of Transportation Design Manual, as amended.
(3) All streets shall have a minimum gradient of 0.5 feet per 100 feet and a maximum gradient of six per 100 feet.
(B) Sidewalks.
(1) If the property subdivided is located within the village or immediately adjacent thereto, sidewalks shall be required. Walks without parkways between street pavement and walks are prohibited in residential areas. All sidewalks shall be constructed in accordance with Appendix B, Standard Specifications for Construction of Portland Cement Sidewalks.
(2) Driveway aprons shall be constructed in accordance with Appendix C, Standard Specifications for Construction of Portland Cement Concrete Driveway Aprons.
(C) Grading. Grading of all lots and streets within the village shall be accomplished in such a manner as to prevent ponding in excess of 18 inches in the event of a complete failure of the storm sewer system. Except in special cases, grading on all lots will be kept within the range of 2% to 20%. Drainage easements will be provided in all cases where surface waters from more than two lots are conveyed down a property line.
(D) Storm sewerage facilities.
(1) Storm sewerage facilities shall be provided to accept and convey all storm waters entering on the subdivision. They shall be designed on the basis of a five-year storm and shall be sized to adequately carry tributary areas at such time as they are developed to the density shown on the Physical Development Plan of the village. Inlets shall be provided at all low points and all points where the design intensity of flow reaches two cubic feet per second.
(2) Rear yard inlets shall be provided with a catch basin bottom having a depth of at least two feet and the outlet pipes shall be installed in such a manner as to preclude the entrance of floating matter into the storm sewer. Rear yard inlets shall have a frame and grate which conforms to the State Standard Type I or as approved by the Village Engineer. Curb inlet frame and grates shall conform to the State Standard Type I or as approved by the Village Engineer. Manhole frame and covers shall conform to the State Standard Type I. Storm sewers shall be designed to flow full with a minimum velocity of three feet per second and a maximum velocity of ten feet per second.
(3) Storm detention facilities shall be provided in accordance with Appendix D, Standard Specification for Storm Water Detention.
(4) Open channels of trapezoidal design may be provided on an optional basis in lieu of enclosed storm sewer pipe where the following acreages and conditions are met:
(a) The channel will serve as the outlet for the enclosed storm sewers from a drainage area of 80 acres or more; the trapezoidal channel has a flat base of eight feet or more in width; a side slope of 3:1 maximum, provided all attempts are made to provide a slope less than the maximum; and an easement of 15 feet or more in width with sodding full width.
(b) The channel will serve as the outlet for a drainage area of 160 acres or more; the trapezoidal channel has a flat base of ten feet or more; a side slope of 3:1 maximum, provided all attempts are made to provide a slope less than the maximum; and an easement 20 feet or more in width with sodding full width.
(c) Open channels serving a drainage area of more than 240 acres shall be subject to design and easement requirements to be stipulated by the Village Engineer at the time the subdivider's preliminary plat and preliminary improvement design are submitted.
(d) All open channels where the bottom slope is less than 2%, shall be provided with a low-flow underdrain of 0.02 cfs per acre capacity. All open channels should be designed to convey storm water without eroding velocities and be provided with adequate checks and erosion control measures.
(5) Maintenance.
(a) Maintenance of stormwater management facilities located on a private development shall be the responsibility of the owner of that development. Before obtaining a permit from the village, the owner of the development shall execute a maintenance agreement with the village guaranteeing that the owner of the development and all future owners will maintain its stormwater management system. The agreement shall specify that the village is authorized to enter onto the development for purposes of inspection of the stormwater management facilities. Such agreement shall be recorded with the Cook County Recorder of Deeds.
(b) The Building Commissioner or his designee shall inspect each stormwater management facility built pursuant to the provisions of this provision at least annually. If any deficiencies are found which might cause the facility to fail to operate as designed, the Building Commissioner shall immediately notify the owner of the facility and demand that it be corrected within 30 days.
(c) If the owner of the development or any future owner fails to adequately maintain the stormwater management facility, and does not make corrections after being notified in writing 30 days prior, the village may have the necessary work completed and assess the cost to the development owner.
(E) Sanitary sewers. Sanitary sewers and services with a minimum cover of six feet shall be provided to serve all lots and to provide for reasonable expansions of the system. Sanitary sewers shall be designed using the criterion of the Metropolitan Sanitary District of Greater Chicago. Sanitary sewer manholes shall be located at points to minimize the possibility of submergence in storms. Manhole frames and grates shall be a bolt-down watertight frame and lid. All sanitary sewers and services to serve residential or commercial properties shall be a Type 1 sanitary sewer as approved by the agency owning the sewers.
(F) Water mains. Water mains and services shall be provided to serve all lots and to provide for reasonable expansion of the system. Water mains shall be designed using the criterion of the State Department of Public Health. All valves (except hydrant auxiliary valves) shall be enclosed in valve vaults of minimum diameter four feet, and having a frame and grate similar to that provided for sanitary sewers but bearing the imprint "Water". Fire hydrants shall be located so as to be within 200 feet of all homes and shall be of Eddy or Traverse City manufacture or equivalent with auxiliary valves and boxes (vaults excepted). Fire hydrants shall have a five-inch valve opening and 2-½ inch connections and one four-inch connection. All valves and fire hydrants shall open counterclockwise. Minimum cover for water mains shall be given five feet.
(G) Landscaping.
(1) Unpaved or unimproved areas.
(a) That all unpaved or otherwise not improved areas of any parkway adjacent to an improved lot will be fine graded and have an established lawn, within one year from the date that occupancy (temporary or otherwise) is approved.
(b) All unpaved or otherwise not improved areas of any parkway adjacent to an unimproved lot will be fine graded and have an established lawn, before the acceptance of the subdivision.
(c) Exceptions. Those areas designated and approved for parkway trees and only then when such area does not exceed four feet in diameter.
(2) Street trees shall be provided by the owner along all streets where trees do not exist. Trees shall be of a species suitable for local soil and climate conditions and adapted to street use at least 2-½ inch caliper six inches above grade. At street corners, the trees shall be located a minimum of 25 feet from the intersection of the street right-of-way lines. They shall be located so as not to interfere with utilities or sidewalks and placed no further than 45 feet apart. Trees shall be placed in the grassed area between curb and sidewalk unless the space is less than six feet wide or the Village Engineer determines they will interfere with sewers, water lines, or underground utilities, in which case the trees shall be planted on the lot.
(3) In informal type street patterns, informal planting of street trees in accordance with approved landscape development plans may be permitted.
(4) (a) The list of the official street tree species for the village, which are allowed, are referenced in § 98.15 of this code, and are made a part hereof.
(b) The following trees are NOT allowed to be planted in street parkway areas:
Acer negundo (Box Elder)
Acer saccharinum (Silver Maple)
Fraxinus species (Ash)
Juglans nigra (Black Walnut)
Populus species (Poplar)
Quercus palustris (Pin Oak)
Salix species (Willow)
Ulmus species (Elms)
Other species generally considered to have weak
wood, insect problems, or disease problems.
(c) The village may approve the use of ornamental trees upon the review of the location with respect to sight distance, the association with other trees within a subdivision or on a street, and their susceptibility to disease and/or insect problems. Section 98.15 of this code references the list of official street tree species which are allowed, as well authority of the Tree Board pursuant hereto.
(d) The village shall have certification from the developer that the street trees are free from disease under the State Plant Inspection Department of Standards. The trees shall be transplanted stock and transplanting thereof having been done within four years from the time of purchase. All trees shall have their trunk protected with tree wrap paper, from the base of the trunk up to the lowest branch. All trees planted by the developer shall be guaranteed for one year from the date of planting and shall be replaced by the developer at no charge to the village, should they die or fail to be in a healthy and thriving condition in the opinion of the village. The replacement tree shall be of the same species, size, and quality, and carry the same one-year guarantee.
(5) (a) All unpaved areas of all improved lots shall be fine graded and have an established lawn, within one year from the date that occupancy (temporary or otherwise) is approved.
(b) Exceptions.
1. Those areas intended for landscaping, when such areas are defined and separated from the lawn areas by a permanent type barrier. Barriers may be curbs, sidewalks, railroad or landscaping timbers, plastic or aluminum lawn edging or other similar material. The intended landscaping must be completed within one year from the date that occupancy (temporary or otherwise) is approved, and must be substantiated by the submission of a proposed plan and layout.
2. Those areas intended for future accessory structures, including but not limited to patios, decks and pools. These areas must have all organic material removed and the appropriate base established. Submission and approval of the permit application for the proposed structure must be completed within one year from the date that occupancy (temporary or otherwise) is approved.
(6) Median strips and landscaping easements shall be planted with trees and shrubs in accordance with a landscaping plan approved by the Planning, Zoning and Development Commission.
(H) Street signs. Street signs shall be in conformance with village standards.
(I) Street lighting. Street lighting shall be in conformance with village standards in Appendix E of this chapter.
(J) Public utilities. Telephone and electric service lines shall be placed underground entirely throughout a subdivided area; said conduits or cables shall be placed within easements or dedicated public ways in a manner which will not conflict with other underground services. Further, all transformer boxes shall be located so as not to be unsightly or hazardous to the public.
(Ord. 77-05, passed 4-6-77; Am. Ord. 85-11, passed - -85; Am. Ord. 85-13, passed 10-9-85; Am. Ord. 89-15, passed 5-10-89; Am. Ord. 95-06, passed 4-10-95; Am. Ord. 2001-010, passed 6-6-01; Am. Ord. 2008-005, passed 3-5-08) Penalty, see § 156.99