NR 811.76(1) (1) Above-water crossings.

NR 811.76(1)(a) (a) The pipe shall be adequately supported and anchored, protected from damage and freezing, and accessible for repair or replacement.

NR 811.76(1)(b) (b) A means to accommodate bridge expansion such as an expansion joint shall be provided to the water main if the corresponding bridge has expansion joints.

NR 811.76(1)(c) (c) Shut-off valves shall be provided at both ends of a bridge crossing if the bridge has expansion joints so that the section can be isolated for testing or repair. The valves shall be easily accessible and not subject to flooding.

NR 811.76(2) (2) Underwater crossings.

NR 811.76(2)(a) (a) A minimum cover of 2 feet shall be provided over the pipe.

NR 811.76(2)(b) (b) When crossing water courses which are greater than 15 feet in width, the following shall be provided:

NR 811.76(2)(b)1. 1. The pipe shall be of special construction, having flexible, watertight joints. Butt fused DR 9 or 11 HDPE pipe or butt fused DR 14 or 18 PVC pipe are an acceptable alternative.

NR 811.76(2)(b)2. 2. Shut-off valves shall be provided at both ends of water crossings so that the section can be isolated for testing or repair. The valves shall be easily accessible, and not subject to flooding, and the valve closest to the supply source shall be in a manhole. Unless the department approves an equivalent method, permanent taps shall be made on the pipe within the manhole on either side of the valve to allow insertion of a small water meter to determine leakage during system pressure testing.

NR 811.76 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.

NR 811.77 NR 811.77 Common casing crossings. In some cases, such as highway crossings, it becomes desirable due to extremely high construction costs to install water mains, sanitary sewers, force mains or storm sewers within a common casing. The following requirements apply:

NR 811.77(1) (1) Any sewers shall be constructed of water main class pipe and joints and pressure and leakage tested in accordance with the requirements in s. NR 811.12 (5) (d) 2.

NR 811.77(2) (2) The water main shall be located above the sewer main and be adequately supported.

NR 811.77(3) (3) A vertical separation distance of 6 inches shall be maintained between the bottom of the water main and the top of the sewer main.

NR 811.77(4) (4) Normal separation distances shall be provided as close as possible to the ends of the casing.

NR 811.77(5) (5) Force mains shall be installed within an intermediate casing within the larger casing. The intermediate casing shall extend a minimum of 5 feet beyond each end of the larger casing.

NR 811.77(6) (6) The remaining space in the casing may be filled if desired.

NR 811.77 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.

NR 811.78 NR 811.78 Water loading stations. Water loading stations shall comply with the requirements of this section to prevent contamination of both the public water supply and potable water vessels being filled.

NR 811.78(1) (1) There may be no backflow or backsiphonage to the public water supply. Either a free air break shall be provided as shown in Figure No. 11 in the Appendix or alternatively, a reduced pressure principle backflow preventer shall be installed on the water loading piping. Cross connection control shall be provided to meet the requirements of s. SPS 382.41.

NR 811.78(2) (2) The piping arrangement shall prevent contaminants from being transferred from a hauling vessel to others subsequently using the station.

NR 811.78(3) (3) Hoses may not be contaminated by contact with the ground.

NR 811.78 Note Note: It is recommended that a water meter be installed on the piping at all water loading stations to record water usage. It is also recommended that a free air break be installed in place of installing a reduced pressure principle backflow preventer.

NR 811.78 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; correction in (1) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672.

subch. XI of ch. NR 811 Subchapter XI — Water Pressure Booster Stations

NR 811.79 NR 811.79 General. If the storage or primary pumping facilities cannot provide a minimum static pressure of 35 psi throughout the distribution system at street elevation, it shall be necessary to create a boosted pressure zone to serve those portions of the system. The use of pressure boosting systems on individual service lines shall be limited to a maximum of 10 individual systems in any given service area. The minimum static water pressure at street elevation shall be 20 psi in order for individual pressure boosting systems to be installed. Individual pressure boosting systems shall be owned and maintained by the water system owner. Booster station design shall be in accordance with this subchapter.

NR 811.79 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.

NR 811.80 NR 811.80 Location.

NR 811.80(1) (1) Pumps shall take suction from a reservoir, a water main adjacent to a reservoir, or elevated tank, where possible. If necessary, pumps can take suction from a distribution system water main if the installation complies with the requirements of this subchapter.