A. Improvements Required; Guarantee: As a condition to the approval of the final plat of property within city limits, the city council may require the subdivider to bring any streets, roads, and alleys to a grade as shown by the profiles attached to the final plat and to install improvements shown on the plat and supporting documents, together with such other improvements as the city council determines necessary and authorized by law. The city council may further require the subdivider to provide security for the maintenance of such improvements or to provide security guaranteeing the installation of such improvements within a fixed time and maintenance thereafter and approve the final plat conditioned upon receipt of such security. (Ord., 12-5-1961)
B. Improvement Standards:
1. Sanitary Sewers: Sanitary sewers connected to the city sanitary sewer system shall be installed by the subdivider to meet the standards of federal, state and local governments and shall also conform to the following regulations:
a. House connection wyes to serve each individual lot shall be installed in sewer main, with pipe risers in deep sections to within nine feet (9') of final street grade.
b. House connection service laterals shall be extended from the main to the property line at each lot before permanent street surfacing is constructed.
c. Minimum main sewer size shall be twelve inches (12") diameter and minimum lateral size shall be four inches (4") diameter. (Ord., 12-5-1961; amd. 2001 Code)
2. Water Service: Water service connected to the city water system shall be installed by the subdivider to meet the standards of federal, state and local governments and shall also conform to the following regulations:
a. Minimum main size in street shall be six inch (6") diameter pipe. Cast and ductile iron pipe shall be cement mortar lined. Fittings should be cement mortar lined.
b. Hydrants shall have a six inch (6") minimum diameter gate valve on six inch (6") hydrant pipe feed to main. Hydrants shall be installed at intervals no greater than five hundred feet (500') and possibly shorter depending upon the area being served. Hydrants and hydrant valves will be furnished according to city requirements.
c. Shutoff valves and street boxes shall be installed on mains at intervals no greater than three hundred feet (300') depending upon the area being served. (Ord., 4-7-1975; amd. 2001 Code)
d. House laterals of copper pipe shall be installed from main to property line at each lot, and shall include a corporation cock at the main, and a curb box and shutoff valve at the property line. Laterals shall be installed before permanent street surfacing is constructed.
e. Dead-end mains shall be minimized as much as possible by looping of the mains. Where dead-end mains occur, they shall be provided with a fire hydrant, flushing hydrant or blow-off for flushing purposes.
f. Subdivision developments will not be approved in an area which presently does not have sufficient pressure and fire flow available in the distribution system to provide adequate fire protection for the type of development planned as recommended by the insurance service office of Illinois.
3. Streets:
a. Streets connected to the city street system shall be constructed by the subdivider. Materials and construction methods shall comply with the standards of the Illinois department of transportation, and shall also conform to that type of finished street determined by the council from the following types:
(1) Portland cement concrete curb and gutter with hot-laid bituminous concrete street surface. The street shall be thirty feet (30') wide between curb faces, with eight inch (8") thick compacted three-fourths inch (3/4") crushed stone base and three inch (3") hot laid bituminous concrete street surfaces. The bituminous concrete shall be laid in at least two (2) courses.
(2) Portland cement concrete curb and gutter with seven inch (7") thick portland cement concrete street surface. The street shall be thirty feet (30') wide between curb faces, and the curb and gutter may be either integral or separate.
b. Widths and thicknesses above are for minor streets only. Greater widths and thicknesses may be required by the council for streets carrying other than neighborhood traffic. The above are considered permanent street surfaces. (Ord., 4-7-1975)
4. Storm Sewers: Storm sewers shall be installed by the subdivider to meet the standards of the Illinois division of highways, and shall also conform to the following regulations:
a. Minimum pipe size shall be twelve inch (12") diameter for both main sewer and catch basin laterals. (Ord., 12-5-1961)
b. Catch basins shall be installed at intervals not greater than five hundred feet (500'). (Ord., 12-5-961; amd. 2001 Code)
c. Storm sewer manholes, laterals, and catch basins shall be installed before permanent street surface is constructed.
5. Sidewalks: Sidewalks shall be of four inch (4") concrete, four feet (4') wide, one foot (1') from the property line, and shall be constructed in accordance with specifications of the Illinois division of highways. Subdivider will construct sidewalks when specifically directed to do so by the city council as a condition of approval of the final plat. (Ord., 12-5-1961)