Water Committee Agenda and Packet 2015 04 03

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2 WATER DEMAND AND HISTORICAL DEMAND MANAGEMENT Peak demand occurred in July 2013 at 0.715 mgd. Average production from the plant during warmer months from May through September is approximately 0.55 mgd. Total annual production from the plant in 2013 was approximately 100 MG The City supports maximizing reusable system utilization and the potential exists to increase the supply of reuse water. Several water users have expressed interest in switching to reuse in place of potable water for their irrigation needs. During 2014, the City conducted a study evaluating reuse system expansion. It was found that with the current water rights usage, there is very little spare capacity in the reuse system because the City has a limited amount of reusable water. As a result of that study, Louisville decided to maximize utilization of the system by installing infrastructure that would enable several large users to transition from potable water to reuse supply. This transition is expected to occur within the next five years and is estimated to reduce Louisville's peak demand by 130,000 gpd, and seasonal demand by approximately 12 MG. More reusable water will become available as Windy Gap water starts to get used in the municipal system, which will be done once the Windy Gap Firming Project is completed. Currently, the Windy Gap supply is not utilized because of its unreliability and high cost. Several City parks still use potable water for irrigation, totaling about 66 MG per season. Expanding the reuse system to include additional large water users and City parks could increase the total reuse water used annually to approximately 120 MG. Over a period of 6 months, this would be equivalent to approximately 0.66 mgd. 2.3 Current Demand Management Activities The City of Louisville is very committed to efficient water use and good environmental stewardship. The activities and programs described in this section were implemented by the City prior to 2014 and water savings have already been achieved from these efforts. A summary of water conservation activities is also provided later in the plan in Table 14, which also has a list of existing activities. 2.3.1 Foundational Activities 2.3.1.1 Water Conservation and Integrated Resources Planning • The City implements an integrated resources planning approach that fully integrates water conservation into water supply planning processes. • The City regularly updates their water supply master plan, capital improvement plan, and feasibility studies to ensure a diverse, robust, and resilient water supply. 2.3.1.2 Metering, Water Rates, and Billing Practices • 100 percent of the City's customers are metered. • Water use is tracked by various customer categories (residential, multifamily, commercial, irrigation, and city). • There is monthly volumetric billing for all customers. • Drive -by advanced metering infrastructure (AMI) with new meters were installed in 2010 -2011. • The City has a goal to replace meters every 10 years. • Water rates are reviewed annually and adjustments are made to cover utility costs. • There is an inclining block water rate structure to encourage efficient outdoor water use and other conservation - oriented structures are being considered. • Commercial water tap fees are charged based on estimated annual demand, which could result in more water - efficient development. • Separate irrigation meters are required for townhomes and multifamily developments with 5 or more units and are offered for commercial as optional. 2 -10 WBG071714052946BSO