Tualatin Valley Water District WMCP Development

The Tualatin Valley Water District is currently in the midst of a major change in its water supply sources. The District will be implementing an Advanced Metering Infrastructure program in the next few years, providing new tools and capabilities for water management that allow the District to be more effective with its water conservation program and water loss monitoring.

GSI first helped the District develop a WMCP that reflects this major change to its water supply. Our work began with a focus on data collection and analysis to support the development of a WMCP. This included reviewing at least 5 years of recent demand (raw and finished) and consumption data to determine annual, monthly, and daily values for water diverted, gross water production, net water demand, consumption by customer category, and water loss. The WMCP describes the District’s conservation measures and 5-year water conservation benchmarks, its curtailment plan, and projected water demands and how water rights will be used to meet those demands.

GSI and our teaming partner are now focusing on delivering a conservation and water loss program assessment. The work includes using our teaming partner’s Decision Support System Model to help the District conduct a water savings and cost-effectiveness analysis of its water conservation program. The model will leverage data collected during the development of the WMCP and can align with demand projections to estimate water savings and costs over time related to different conservation programs. The model considers a variety of conservation measures and analyzes different combinations of those measures—taking into account the District’s preferences for measures and programs to analyze—to help identify water conservations program options for the District.

GSI's work involved:

• Developing a WCMP that documents the District’s water supply, demands, conservation efforts, and curtailment plan.
• Collecting and analyzing data related to water demand, consumption, and loss, as well as water rights and future water supply needs.
• Assessing the current water conservation program and developing 5-year water conservation benchmarks and refining the curtailment plan.
• Identifying options for the District’s water conservation program through a water savings and cost-effectiveness analysis.