No preliminary plan or plat of any subdivision shall be approved unless and until the required improvements to be constructed have been described in the form of supporting documents which shall include, but not be limited to, the following:
(A) Storm water drainage and detention facilities. Storm sewers, stormwater detention facilities and open drainage channels shall be sized and designed, including all necessary appurtenances thereto, to accept and convey all stormwater runoff from all lots in accordance with the provisions of this chapter.
(B) Sanitary sewerage facilities. Sanitary sewers and all appurtenances, including pumping stations and force mains, shall be sized and designed to serve all lots, and designed to provide for future expansion or extension of the system services in accordance with the provisions of this chapter.
(C) Water distribution system. Water distribution mains, services, and all other appurtenances shall be sized and designed to serve and provide for fire protection for all lots, and designed to provide for future expansion or extension of the system services in accordance with the provisions of this chapter.
(D) Internal and perimeter street layout and geometric design. All streets shall be compatible with existing and proposed streets, topographical conditions, public convenience and safety.
(E) Curb and gutter. Combination concrete curbs and gutters shall be provided on both sides of all public and private streets.
(F) Sidewalks. Concrete sidewalks shall be provided on both sides of all public and private streets and cul-de-sacs. Sidewalks shall be located one foot from the property line of all lots and along such lines extended to intersecting streets. Sidewalks without parkways between the back of curb and the edge of the sidewalk (aka carriage walks) are prohibited.
(G) Street and site lighting. Street and on-site lighting systems shall be provided for all public and private streets and development areas.
(H) Street signs. Street signs and/or poles shall be provided to aid in identification of all public and private streets and bikepaths.
(I) Bikepaths. Bikepaths shall be provided to serve proposed parks and other public areas designated on the latest version of the city of lockport bicycle/pedestrian system master plan and/or the latest version of the I-355 Area Trails Master Plan, and shall be designed in accordance with applicable provisions of this chapter and/or applicable master plan.
(J) Landscaping. All parkways and medians within any dedicated street right-of-way or any other areas of public use shall be landscaped in accordance with the provisions of this chapter.
(K) Grading and drainage. The grading of all lots and streets shall be designed to provide positive drainage and to prevent the ponding of surface water in excess of eight inches depth in the event of a complete failure of the storm sewer systems. The grading of lots shall be designed to provide slopes of not less than 1%, nor greater than 25%. Drainage easements shall be provided wherever surface waters from more than one lot are conveyed along a property line.
(L) Public utilities. All public utility lines for electronic sounds and signals, telephone, electric and gas services shall be placed in easements, entirely underground and in compliance with standard engineering procedures adopted by the franchised utility and the “National Electric Code” latest edition.
(M) Soil erosion and sedimentation control/dust control. All developments shall have a planned program for erosion, sedimentation and dust control during construction. The developer shall comply with the standards as set forth in the Will County Stormwater Management Ordinance and the Illinois Environmental Protection Agency General NPDES Permit No. ILR10.
(N) Off-street parking facilities. All developments shall provide off-street parking facilities in accordance with the requirements listed in the Lockport Zoning Ordinance.
(O) Foundations and floor elevations. The foundations and floor elevations of all structures to be constructed on any lot shall be shown on the subdivision plan to assure adequate provisions will be provided for the storage and conveyance of stormwater runoff and subsurface drainage. The subdivision plan shall conform to the requirements of the Will County Stormwater Management Ordinance and Chapters 152 and 153 of the City of Lockport Municipal Code.
(Ord. 18-008, passed 2-7-18; Am. Ord. 18-051, passed 1-16-19; Am. Ord. 21-021, passed 8-18-21)