§ 153.170  DESIGN.
   (A)   All design criteria shall be in general conformance with §§ 153.140 through 153.159 and 153.170 through 153.174, the current Illinois Environmental Protection Agency (IEPA) regulations, the IEPA Technical Policy Statements, and the Recommended Standards for Waterworks, latest edition.
   (B)   Design and construction of watermains shall be in accordance with §§ 153.140 through 153.159 and §§ 153.170 through 153.174 (including division (A) above), and, if not stated therein, the requirements of the state’s Standard Specifications for Water and Sewer Main Construction, latest edition.
   (C)   Watermain sizes shall depend upon factors such as the demand requirements, the pressure requirements in distribution system, and plans for the expansion of the municipal system. All watermains located within the distribution system shall be a minimum of six inches in diameter.
   (D)   Watermains along collector streets and arterial streets will typically be at least eight inches in diameter so as to provide a system of arterial watermains. Watermains around cul-de-sacs that are dead-ends shall serve a fire hydrant and shall not be less than six inches in diameter.
   (E)   The layout of the watermains shall be as needed to serve adequately all lots and tracts with connection to the municipal system. The mains shall be looped and valved to permit shutting off of service to only a small number of connections for repairs or maintenance. Preferably, disruption of service should be limited to one block. Looped mains shall be provided in all locations except cul-de-sacs or scattered properties. The design and construction shall include the placement of all fittings including tees, crosses, and the like where future development indicates looping will be required.
   (F)   Unlooped mains or dead ends shall be equipped with a fire hydrant or permanent blow-off for flushing. See the attached detail.
   (G)   Fire hydrants shall be installed throughout the entire distribution system. At least one hydrant shall be installed at each street intersection. The hydrant spacing shall provide for hose lines along right-of-way lines not exceeding 350 feet to any portion of a lot or a 500-foot interval between hydrants along the street. Fire hydrants shall also be placed at all high spots in the distribution system.
   (H)   All fire hydrants shall be equipped with an auxiliary valve located between the main and the hydrant. See Appendix B.
   (I)   All hydrant leads shall be a minimum six-inch diameter.
   (J)   All hydrants shall have two two and one-half inch hose connections, and one four and one-half inch pumper connection.
   (K)   All plugs, caps, tees, bends, and fittings deflecting 11.25 degrees or more on watermains shall be provided with a reaction blocking. The reaction blocking shall be concrete mix having a compressive strength of not less than 3,000 psi at 28 days. Reaction blocking shall be placed between solid ground and the fitting to be anchored; the area of bearing on the pipe and on the ground in each instance shall be shown on the drawings. Reaction blocking shall be designed for a minimum internal pipe pressure of 100 psi. The blocking shall be kept clear of the entire bell configuration of any adjacent joint and shall be at least as large as is necessary to restrain the fittings from movement. At the subdivider’s option, restrained or tied joints can be used on ductile-iron pipe in lieu of thrust blocks. When used, restrained joints shall be installed on both sides of the particular fitting and on the next two pipe joints in either direction from the fitting. The number of restrained joints required upstream and downstream from a fitting shall be per the restraining devices manufacturer’s recommendations and per the calculations of the subdivider’s engineer.
   (L)   Valves shall be uniformly located in some standard area such as street or curb line to facilitate their locations. A valve box, with its cover at the finished grade, shall always be placed over a buried valve. Valves should be located on all branches from feeder mains and between distributors and fire hydrants. Three valves shall be provided at crosses and two valves at tees; the valves should be placed on the smaller lines at each cross or tee.
   (M)   Valves shall be spaced not more than 500 feet apart in commercial and industrial areas and 800 feet in all other areas.
   (N)   At the outer limits of the subdivision, valves at tees and crosses shall be placed so as to require the least number of watermain shutdowns that would be needed when the mains for future subdivisions are extended. Watermains shall be extended to the outer boundary of the subdivision to facilitate future extensions.
   (O)   A service connection shall be extended to each lot. All service connections shall be supplied with corporation stops and curb stops with box. The service pipe shall conform with the village rules and regulations for water service. Water service lines shall be installed by the developer from the watermain to the property line and shall terminate at a curb stop. The individual homeowner is responsible for the installation of the water service from the curb stop to the home. The village is responsible for furnishing and installing only the individual water meters.
   (P)   Minimum cover for watermains and services shall be four feet and six inches.
   (Q)   All watermains shall be designed for a normal working pressure during average flow and use conditions of not less than 50 psi, and a minimum pressure of 20 psi under maximum flow conditions.
   (R)   Tie rod joint restraints shall be provided for all bends in the vertical plane.
   (S)   When the subdivider can show by cost estimates that is not economical to connect to the public water system (taking into account the cost of installing individual wells and their maintenance costs), the subdivider shall indicate that the lots are of adequate size to permit the construction of a well on each lot, at least 25 feet from any building, at least ten feet from any lot line, and at least 75 feet from any septic system seepage field. The well shall be situated clear of any driveway, parking area, or other source of contamination. There shall not be any future cross connections between the well system and any public distribution system. The subdivider shall show the location of other wells in the area on an area general plan and shall provide a written recommendation from a licensed well driller stating that an adequate well is likely to be established. The minimum lot size for lots with both a well and septic tank system shall be 25,000 square feet.
(Ord. 97-7, passed 7-1-1997, § 5.17)