Section NR 811.80 - Location(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.(2) For pumps not directly supplied by a reservoir or elevated tank, the suction pressure shall be at least 35 psi when the pumps are supplying design flow rates.(3) Underground installations shall be permitted only if gravity drainage to the ground surface of large volumes of water from the vault can be provided or if the pumps and drivers are protected from damage by water or can be readily replaced. The department may waive the gravity drainage requirement if a minimum of 20 psi can be maintained at street elevation in the boosted zone by the main zone when the station is out of service or if sufficient elevated storage or alternate supply exists within the booster zone. The drain line may not discharge to a storm or sanitary sewer.(4) In-line submersible pumps may be installed below the ground surface in a watertight installation. Provision shall be made for operational monitoring, pressure monitoring, flow metering, water sampling, and isolation valves. The pumps shall be accessible for servicing and repairs.(5) Electrical equipment shall be installed above ground except if determined unnecessary by the department to meet the other requirements in this chapter.(6) Buried stations may not be installed beneath roadways or in a floodplain.Wis. Admin. Code Department of Natural Resources NR 811.80
CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.Refer to ch. NR 116 for floodplain definitions.