Public MeetingPublic MeetingNovember 9, 2010November 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 StatementThe 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

Source:1990-2010, US Census and California Department of Finance2015-2035, Southern California Association of Governments

Year Population Single-Family Housing Units

Multifamily Housing Units Employment

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%

-

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

45,000

50,000

1990 1995 2000 2005 2010 2015 2020 2025 2030 2035

Wat

er D

eman

d (A

cre-F

eet P

er Y

ear)

Actual Projected (average weather, no economicrecession, no additional conservation)

mandatory water restrictions & economic recession

mandatory water restrictions & economic recession

very wet & cool weather

Define Planning Objectives & Performance

Measures

RefineAnalysis(createhybrids)

AnalyzeAnalyzePortfoliosPortfolios

Raw PerformanceScore Card

RankRankPortfoliosPortfolios

Identify Supply Options(building blocks)

Build Portfolios(Combinations of Options)

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 PortfoliosStatus 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 SupplyRepresents the “do everything” future by maximizing use of all local options, as well as water transfers and ocean desalination.

Maximize StewardshipMaximizes “green” solutions such as maximum water conservation, all stormwater best management practices and graywater, and also enhances habitat restoration with environmental streamflows.

Low CostConsists 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 PortfoliosAfter initial portfolios were analyzed, several other portfolios were created and evaluated

Hybrid 1Combines 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 Rankings0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

8 Hybrid 1

5 Maximize SW Supply/GW Recharge

2 Minimize MWD Supply

3 Maximize Stewardship

4 Low Cost

9 Top User Conservation

6 Non-potable Reuse (NPR)

7 Combined NPR and IPR

1 Status Quo

Ranking Score

Provide a reliable water supply Maintain affordability, while addressing fairness and equityProtect & enhance source waters and the environment Protect cultural & recreational resourcesMaximize efficiency of water use Maintain quality of life & positive economic climateReduce risk & maximize opportunities Reduce energy footprint for water operations

Hybrid 1

Max SW/GW

Min MWD Supply

Max Stewardship

Low Cost

Hybrid 2

NPR Recycled

NPR/IPR Recycled

Status Quo

The larger the color bar, the better it achieves the objective below

Sensitivity of Ranking to DifferentWeights for Criteria

Hybrid1

MaxSW/GW

MinMWD

Supply

MaxSteward

shipLowCost

Hybrid2 NPR

NPR &IPR

StatusQuo

A.C.Rank 1 2 3 4 5 6 7 8 9

EqualRank 1 2 3 5 6 8 4 7 9

50%Reliab 1 2 3 4 6 7 5 8 9

30%Afford 1 2 8 5 4 3 6 7 9

50%Efficen 3 5 1 2 6 4 7 8 9

Sensitivity of Ranking to DifferentWeights for Criteria

Hybrid1

MaxSW/GW

MinMWD

Supply

MaxSteward

shipLowCost

Hybrid2 NPR

NPR &IPR

StatusQuo

A.C.Rank 1 2 3 4 5 6 7 8 9

EqualRank 1 2 3 5 6 8 4 7 9

50%Reliab 1 2 3 4 6 7 5 8 9

30%Afford 1 2 8 5 4 3 6 7 9

50%Efficen 3 5 1 2 6 4 7 8 9

This portfolio ranks This portfolio ranks number 1 in all but number 1 in all but

one of the scenarios, one of the scenarios, making it a preferred making it a preferred

strategy for PWPstrategy for PWP

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

Source of Photo: PGSP Final Conceptual Design Report, October 2007

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

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 #3Surfrider Foundation Ocean Friendly GardensGeorgia 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 StrategyBenefitsBenefits Status QuoStatus Quo

Preferred Strategy Preferred Strategy (Hybrid 1)(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

Average Cost to PWP

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/waterplanSections 1-6 available nowSection 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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