§ 5.1. Water source metering.

Most of Irving's water is supplied through its water rights in Jim Chapman Lake located in northeast Texas. This water is pumped from Jim Chapman Lake to Lake Lewisville and the Elm Fork Trinity River where it is eventually treated by the City of Dallas under provisions of a water treatment services contract. The City of Irving also purchases some of its water supply from the City of Dallas through a wholesale services contract. All water received from Dallas, either through the water treatment contract or the wholesale services contract, is master-metered prior to delivery to Irving's ground storage reservoirs located at the Hackberry and MacArthur Pumping Stations. The two (2) master meters are typically tested for accuracy by an independent firm about four (4) times per year. Venturi meters are used at each location and should have an accuracy of plus or minus two (2) percent.

The water delivered to the Hackberry and MacArthur Pumping Stations is metered again by the City of Irving prior to discharge to the water distribution system. These meters are also tested for accuracy about three (3) to four (4) times per year. These meters provide a second independent method to determine the quantity of water that is pumped to the distribution system.

(Ord. No. 2011-9302, § 1, 12-8-11)