Public Meeting November 9, 2010 Agenda What is the Water Integrated Resources Plan (WIRP)? How was the WIRP developed? What are the WIRP major findings? What are the WIRP Recommendations? How to provide input on the draft report? What are your thoughts on what is presented today? WIRP Mission Statement The Pasadena Water Integrated Resources Plan will provide an achievable, long-term strategy to meet current and future water needs. The goals of the WIRP are to sustainably and cost-effectively address local and regional water supply and demand issues, reflect community values, and adapt to changing conditions. Why is the WIRP Needed? Reliability and costs for imported water are becoming more uncertain Pasadena’s local groundwater is being reduced WIRP is the source document for the City’s 2010 Urban Water Management Plan, which is required by state law to be submitted every five years WIRP Stakeholder Input A WIRP Advisory Committee, appointed by the Mayor, met 7 times to provide direction, input and ideas Three (including this one) public meetings Outreach via public polling on internet Planning Assumptions All plans require projections and forecasts to be made regarding growth, availability of water, price of water, etc. California requires that utilities planning for water utilize “official” demographic projections Pasadena recognizes these assumptions may not unfold exactly as planned PWP’s Service Area Pasadena Water & Power (PWP) serves the City and several other communities WIRP represents a strategy to meet the entire service area Service Area Demographics Table A-1 Historical and Projected Demographics for PWP Service Area Year Population Single-Family Housing Units 1990 146,840 31,469 26,253 115,710 2005 168,997 34,195 27,316 119,072 2010 175,957 36,560 27,713 124,860 2015 180,691 37,578 28,907 128,985 2020 185,640 38,646 30,184 131,588 2025 190,436 39,420 31,236 134,653 2030 195,089 40,151 32,264 137,921 2035 199,562 40,717 33,157 141,047 Annual Change (1990-2010) 0.9% 0.8% 0.3% 0.4% Annual Change (2010-2035) 0.5% 0.5% 0.8% 0.5% Source: 1990-2010, US Census and California Department of Finance 2015-2035, Southern California Association of Governments Multifamily Housing Units Employment Water Demand Forecast 50,000 Actual Water Demand (Acre-Feet Per Year) 45,000 Projected (average weather, no economic recession, no additional conservation) 40,000 35,000 very wet & cool weather 30,000 25,000 20,000 mandatory water restrictions & economic recession mandatory water restrictions & economic recession 15,000 10,000 5,000 1990 1995 2000 2005 2010 2015 2020 2025 2030 2035 WIRP Evaluation Process Analyze Portfolios Identify Supply Options (building blocks) Define Planning Objectives & Performance Measures Build Portfolios (Combinations of Options) Refine Analysis (create hybrids) Raw Performance Score Card Rank Portfolios WIRP Strategy WIRP Objectives Provide a reliable water supply Maintain affordability, while addressing fairness and equity Protect and enhance source waters and the environment Protect cultural and recreational resources Maximize efficiency of water use Maintain quality of life and positive economic climate Reduce risk and maximize opportunity Reduce energy footprint for water operations WIRP Options Recycled water for irrigation & cooling towers Recycled water for groundwater recharge Expanded water conservation Increased surface water diversions Groundwater storage of imported water Stormwater capture and groundwater recharge Graywater Water transfers (purchases from others) Ocean desalination (agreement with coastal partner) Increased reliance on imported water from MWD Initial Portfolios Status Quo Represents the “do nothing” future, and includes only existing groundwater and surface water diversions (it has the heaviest emphasis on imported water from MWD). Minimize MWD Supply Represents the “do everything” future by maximizing use of all local options, as well as water transfers and ocean desalination. Maximize Stewardship Maximizes “green” solutions such as maximum water conservation, all stormwater best management practices and graywater, and also enhances habitat restoration with environmental streamflows. Low Cost Consists of all options that have lower or comparable unit costs to the current price of MWD water. Maximize Surface Water Supply and Groundwater Recharge Maximizes use of local surface water diversions and enhanced groundwater recharge. Non-potable Reuse (NPR) Maximizes recycled water to meet non-potable demands via a new non-potable water distribution system. Combined NPR and Indirect Potable Reuse (IPR) Maximizes recycled water for indirect potable reuse (via groundwater recharge), coupled with a smaller non-potable reuse system. Hybrid Portfolios After initial portfolios were analyzed, several other portfolios were created and evaluated Hybrid 1 Combines best elements of top performing initial alternatives and optimizes the size of projects in order to provide maximum benefits at lower cost Hybrid 2 Starts by targeting top 10% of single-family residential users and applies very aggressive pricing in order to reduce demands by 70%, then implements other conservation programs to multifamily, commercial and the rest (90%) of single-family users. Portfolio Rankings The larger the color bar, the better it Ranking Score achieves the 0 0.1 objective 0.2 below 0.3 0.4 0.5 0.6 0.7 0.8 0.9 8Hybrid Hybrid 1 5 Maximize SW Max SW/GW Supply/GW Recharge Min MWD 2 Minimize MWDSupply Supply 3 Maximize Stewardship Max Stewardship 4 LowCost Cost Low 9 Top User Conservation Hybrid 2 6 Non-potable Reuse NPR Recycled (NPR) 7 Combined and IPR NPR/IPRNPR Recycled 1 StatusQuo Quo Status Provide a reliable water supply Protect & enhance source waters and the environment Maximize efficiency of water use Reduce risk & maximize opportunities Maintain affordability, while addressing fairness and equity Protect cultural & recreational resources Maintain quality of life & positive economic climate Reduce energy footprint for water operations Sensitivity of Ranking to Different Weights for Criteria Hybrid 1 Max SW/ GW Min Max MWD Steward Supply ship A.C. Rank 1 2 3 Equal Rank 1 2 50% Reliab 1 30% Afford 50% Efficen Low Cost Hybrid 2 NPR NPR & IPR Status Quo 4 5 6 7 8 9 3 5 6 8 4 7 9 2 3 4 6 7 5 8 9 1 2 8 5 4 3 6 7 9 3 5 1 2 6 4 7 8 9 Sensitivity of Ranking to Different Weights for Criteria A.C. Rank Hybrid 1 Max SW/ GW 1 2 Min Max MWD Steward Supply ship 3 4 Low Cost Hybrid 2 5 This portfolio ranks number 1 in5 all but 6 3 one of the scenarios, making 3 it a preferred 4 6 strategy for PWP NPR NPR & IPR Status Quo 6 7 8 9 8 4 7 9 7 5 8 9 Equal Rank 1 2 50% Reliab 1 2 30% Afford 1 2 8 5 4 3 6 7 9 50% Efficen 3 5 1 2 6 4 7 8 9 Overview of what is in the Preferred Strategy (Hybrid 1) Aggressive water conservation Devils Gate diversion to Eaton Canyon Groundwater storage of imported water Small phase 1 non-potable recycled water, with tunnel augmentation Tertiary-treated recycled water for groundwater recharge Stormwater projects Aggressive Conservation Program Convert about 70% of existing SF homes to comply with California Model Landscape Ordinance – through PWP rebates and rate structures All new SF homes will have drought landscaped front yards, with warm season lawn (model landscape compliant) back yards – through ordinances and PWP rebates Convert 60-70% of existing MF and Commercial landscapes to comply with California Model Landscape Ordinance – through PWP rebates and rate structures Double the implementation of PWP’s current indoor conservation for single-family – through PWP rebates and ordinances Continuation of PWP’s current indoor conservation for MF and Commercial – through PWP rebates Individual meters for all new MF accounts – through ordinance Devil’s Gate to Eaton Canyon County conservation project to reduce discharges to ocean by storing water behind Devil’s Gate Dam (along Arroyo Seco) Recharge water behind dam and provide environmental releases Convey stored water to Eaton Wash spreading basins to help with flood management and additional recharge Collect urban runoff/ stormwater flows along pipe conveyance Groundwater Storage of Imported Water Known as the Pasadena Groundwater Storage Program Build groundwater storage bank through spreading, injection, and in-lieu use In-lieu means reduced groundwater pumping in some years in order to build storage (use an in-lieu source to meet demands) Treated water spreading and some injection wells are already in place Reduced MWD rate for recharge water New extraction wells to recover stored water during shortage periods Source of Photo: PGSP Final Conceptual Design Report, October 2007 Recycled Water Recycled Purchases from LA-Glendale Water Reclamation Plant (Tertiary Treatment) Non-potable Reuse: Phase 1 (Brookside Golf Course & customers adjacent) Indirect Potable Reuse: Recharge at Eaton Canyon spreading grounds via LA County pipeline (Devil’s Gate to Eaton Canyon project) Phase 1 LA County Pipeline (Devil’s Gate to Eaton Canyon) Two proposed alignments shown Stormwater Projects – Residential Residential Cisterns: Collect rainwater from rooftops and store in 100 gallon cisterns for non-potable use Residential Rain Gardens: Downspout from rooftop to garden bio-retention area (approx. 30 ft2) Residential Infiltration strip/bioswale: Bio-retention strip at edge of lot to capture storm runoff and overwatering from property, implemented on a neighborhood scale PWP would provide rebates for ~10,000 homes (or 25 percent participation) for each type of residential option Source of photos: California Sea Grant Green Sheet #3 Surfrider Foundation Ocean Friendly Gardens Georgia Stormwater Management Manual Stormwater Projects – Comm/Ind Commercial Parking Lot Swales: Large bio-retention area to collect runoff from parking lot areas Permeable Pavement Parking Lots PWP would provide rebates for: 30 percent participation of parking lot swales 20 percent participation of permeable pavement Photos provided by Sean Van Delist, Cement Council of Texas 2035 Average Annual Supply Mix Benefits of Preferred Strategy Status Quo Preferred Strategy (Hybrid 1) Annual Shortage Under Delta Restrictions (AFY) 7,500 (17%) 0 Monthly Shortage Under MWD Shut Down (AFM) 2,000 200 Annual Groundwater Recharge (AFY) 3,600 15,500 Reduced Stormwater Pollution (AFY) 0 1,350 Greenhouse Gases (mt/yr) 42,400 22,100 Compliant with 20 x 2020 NO YES Compliant with MWD Regional Planning (IRP) NO YES Benefits Average Cost to PWP 854 853 853 852 $/Acre-foot 851 850 849 848 847 847 846 845 844 Status Quo Preferred Strategy Potential Climate Change Impacts Greater outdoor water demand Reduced imported water supplies Lower groundwater levels Source: SIO data for Pasadena vicinity Benefits of Preferred Strategy in Mitigating Climate Change Impacts Reduces greenhouse gas emissions by almost 50% by 2035 Reduces outdoor demands through conservation, lessening impact of hotter temperatures Develops recycled water, which is not affected by climate change Increases storage in Raymond Basin Implementation Issues Uncertainty in growth projections Rate structure re-examination New conservation ordinances Partnerships with Los Angeles County & Pasadena Public Works Regulatory approval for indirect potable reuse Outside funding from MWD, state & others Adaptive Implementation If growth and water supply issues unfold as assumed, implementation of Hybrid 1 should occur within next 20 years If water demands do not increase as planned, only elements of Hybrid 1 that cost less than MWD imported water should be implemented Other elements should then be phased in as needed Draft WIRP Report Review Draft report posted at: www.pwpweb.com/waterplan Sections 1-6 available now Section 7 available on Dec 9th Public comments via on-line survey will be possible from Dec 9th – Dec 16th WIRP will be presented to City Council in January 2011. 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