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HomeMy WebLinkAbout2011-12-07 Powerpoint City of Ukiah Recycled Water Master Plan Project Update City Council Meeting December 7, 2011 Drivers for developing a recycled water program – recycled water can: Provide an alternate disposal through irrigation use Help meet future WWTP permit requirements Help meet the 2009 CA Water Conservation Act - 20% urban water use reduction by 2020 Extend existing storage ponds useful life and capacity Reduce river water withdrawals Provide an alternate source for frost protection Recycled water would benefit the entire Valley City of Ukiah Calpella County Water District Hopland Public Utility District Millview County Water District Redwood Valley Water District Rogina Water Company Willow County Water District Agricultural Users Ukiah Valley Sanitation District Mendocino County Russian River Flood Control and Water Conservation Improvement District Mendocino Community College The Master plan process is gathering community input at multiple stages AWT Capacity Water demands were established with climate data and community input Assumed water user parameters for each crop type: Frost periods Maximum frost event duration Average frost events per maximum month Rate of application Minimum time between frost events Average total demand during frost season Irrigation season Average annual demand Typical time of day irrigation occurs Potential recycled water sites were identified using GIS and community input Agricultural parcels include diverse crop types Several recycled water scenarios were identified and analyzed Scenario 1: Maximize frost protection with existing facilities Scenario 1B: Maximize irrigation w/ existing facilities Scenario 2: Grower provided storage Scenario 3: Centralized storage at WWTP Scenario 3B: Centralized storage maximizing irrigation Scenario 4: Grower use w/ maximum urban irrigation Scenario 1: Maximize frost protection with existing facilities Scenario 1B: Maximize irrigation with existing facilities Scenario 2: Grower provided storage Scenario 3: Centralized storage at WWTP Scenario 3B: Centralized storage maximizing irrigation Scenario 4: Grower use with maximum urban irrigation Recycled water scenarios were quantified A qualitative comparison was also developed to screen alternatives *Assessment: Min = minimal; Mod = moderate; Max = maximal Screening and ranking showed utilizing existing facilities best met the criteria * Score: lowest = meets criteria best; highest = meets criteria least. Score based on both quantitative and qualitative criteria. ** Rank: 1 = meets criteria best; 5 = meets criteria least Funding and Financing analysis will be a key next step City should strategically pursue funding opportunities …without depending on them State; Federal; Local Grants Drivers of project provide nexus for potential cost sharing Water Ratepayers Reduces need for future (perhaps more costly) potable supplies Wastewater Ratepayers Offsets more costly discharge management Other Source General fund transfers for realized community benefits City should consider recovery of ongoing O&M costs from users Recovery of distribution from all users should be considered Urban Agricultural Industry and State guidelines drive recycled water charges The rates charged to each property owner must be directly related to the service received by that property owner – Prop. 218 Pumping Maintenance Next steps Confirm and further develop recommended alternative Develop funding and financing plan and position for grant funding for implementation Conduct stakeholder workshop No. 3 Develop and submit draft and final master plan Acquire planning grant funds