(A) The subdivider shall provide the subdivision with a complete sanitary sewer system which shall be connected with the municipal sanitary sewer system, subject to there being capacity within the municipal system to accept the proposed load.
(B) When no municipal sanitary sewer system is available or is not reasonably accessible to the subdivision, the subdivider shall provide the subdivision with a complete sanitary sewer system which shall be connected to a sanitary sewer system approved by the State Department of Public Health and/or the State Environmental Protection Agency.
(C) When no approved sanitary sewer system is available, or is not reasonably accessible to the subdivision, one of the following methods of sewage disposal shall be used:
(1) (a) When the topography of the subdivision does not allow for connection to the municipal sanitary sewer system with a gravity sewer, the subdivider shall provide the subdivision with a pumping station that pumps the sewage to the nearest available municipal sanitary sewer. The pumping station shall be designed to accommodate the loading produced by the proposed subdivision and any other upstream areas that are tributary to the subdivision. Sanitary sewer loading produced by the tributary area shall be estimated using the following criteria for residential development based on the zoning classification:
Zoning District | Loading Estimate |
R-S | 15 people/acre |
R-1 | 21 people/acre |
R-2 | 36 people/acre |
R-3 | Reserved |
R-4 | 73 people/acre |
R-5 | 73 people/acre and 250 gallons/person/day |
(b) Once the sewage loading has been determined, the sanitary sewer system to receive the loading shall be evaluated to determine if it has adequate capacity. Pumping stations shall be designed in accordance with the State of Illinois Rules and Regulations, Title 35, Subtitle C, Chapter II, Part 370, Illinois Recommended Standards for Sewage Works (latest version). Specific equipment and materials used in the pumping station such as pumps, valves, motors, pipe, control panels, wiring and the like, shall be subject to approval by the Village Engineer. Copies of all mechanical and electrical component testing shall be provided to the village and Village Engineer. Upon construction completion of the pumping station, a successful start-up operation shall be performed in the presence of a manufacturer’s representative, village representatives and Village Engineer. Any and all manufacturer’s warranties shall be transferred to the village.
(2) Private sewage disposal systems consisting of septic tanks and tile absorption fields or other approved sewage disposal systems laid out in accordance with the requirements of the State Department of Public Health are permissible only outside the village limits.
(D) Whenever a private sewage disposal system is to be utilized, the subdivider shall require as a condition of the sale of each lot in the subdivision that the private sewage disposal system is constructed by the owner of the lot before occupation of the lot occurs.
(E) No storm sewers, sump drain lines, footing tile lines and the like shall be connected to sanitary sewer lines.
(F) Sanitary sewer pipe shall have a minimum diameter of eight inches for main line sewers and four inches for lateral sewers, and shall be of material, joints and fittings as specified by the village or as approved by the Village Engineer.
(G) A tee and lateral shall be constructed for each individual lot or parcel in the subdivision and shall be a minimum of four inches in diameter. The four-inch lateral shall extend to eight feet beyond the easement. A service riser may be required by the Village Engineer if the depth of the main line sewer is excessive. The material for the lateral pipe shall be as specified above.
(H) (1) Manholes shall be built where sewers change in size, slope or direction, and at a maximum spacing of 400 feet for sewers 15 inches and less in diameter and 500 feet for sewers l8 inches through 30 inches in diameter. Manholes shall be precast concrete and have a minimum of 0.1 feet of drop across the flowline. Where manholes are constructed in areas susceptible to surface runoff infiltration, the frame and lid of such manholes will be of the bolt down and water-tight type. Manhole lids for sanitary sewer shall be completely closed and self sealing. Where sanitary sewers are terminated at the boundary of the current subdivision so as to serve future development, a six-inch diameter clean-out shall be constructed at the terminus of the sewer pipe, raised to grade and capped with a cast iron plug to provide access to the system. The cleanout shall be acceptable to the Village Engineer.
(2) The sewer lines shall be located generally on the north and east sides of the streets, within a dedicated village easement contiguous with the street right-of-way with a minimum cover of three feet.
(I) All sanitary sewer construction shall be done in accordance with the Standard Specifications for Water and Sewer Main Construction in Illinois, latest edition. All sanitary sewer trenches shall be backfilled with approved material select granular backfill as defined by the State Department of Transportation Standard Specifications for Road and Bridge Construction (latest edition) and supplemental and recurring special provisions, gradation FA-6 and compacted by approved methods.
(J) If larger size sewers are required by the village to serve areas other than the subdivision, the cost difference may be paid by the village in accordance with any such policies in effect at the time the subdivision is considered.
(K) Upon completion of the sanitary sewer system, the subdivider’s engineer shall certify that the sanitary sewer system has been constructed in accordance with the approved plans and specifications and shall furnish the village with copies of the record drawings, using current technology and, at the discretion of the Village Engineer, a suitable computer disk containing all information as required in § 155.051(F) transferred to a database software. The subdivider’s engineer shall submit test results to the Village Engineer and the Springfield Metropolitan Sanitary District for allowable leakage and deflection (where applicable) with the record drawings.
(L) The sewer lines shall be located generally on the north and east sides of the streets, with a dedicated village easement contiguous with the street right-of-way with a minimum cover of three feet.
(2009 Code, § 35-5-4) (Ord. 91-4, passed 5-6-1991; Ord. 97-6, passed 4-14-1997; Ord. 98-9, passed 10-10-1998; Ord. 05-08, passed 11-14-2005; Ord. 06-04, passed 7-10-2006)