A Look atLong-Term Water Supply

inWashington County

City of Hillsboro & Tualatin Valley Water DistrictMarch 6, 2013

A community conversation about drinking water

Water is Essential to any Community

Public Health – Fire Protection – Jobs and the Economy

Hillsboro's Water SystemServing 75,000 residents from the Tualatin watershed

Tualatin Valley Water District provides water to 200,000 people in unincorporated Washington County

and portions of Beaverton, Hillsboro and Tigard.

Why do we need more water?Hillsboro and TVWD both have enough water for now, but need to plan for future—just like predecessors did for us.

2012 2020 2030 2040 20502025303540455055606570

Summer Water Need

Mill

ion

Gal

lons

per

Day

Hillsboro will need twice as much water in

the next 50 years as available today.

TVWD Looks AheadWe have enough water for today—but need to take

steps to have enough water to meet future demands.

2012 205020

30

40

50

60

70

80Peak Day Demand

Mill

ion

Gal

lons

per

Day

82,000 new residents by 2042.

More jobs and businesses too.

Current Peak Day Water Supply

Where do communities get water?Reservoirs GroundwaterRiver water

Purchasewholesale

water

Water conservation

Hillsboro relies on a River and Reservoirs inTualatin/Trask Watersheds

No redundancy in current Hillsboro

system

Barney Reservoir Hagg Lake Upper Tualatin River

TVWD uses a portfolio of water supplies

An aquifer storage and recovery (ASR) well provides backup and summer supply.

Purchase wholesale water from Portland

Ownership in Tualatin/Trask watershed supply

Multiple water supplies provide

redundancy.

Hillsboro’s Supply Study Process

Feb 2010-Sept 2012 Supply options research

Sep - Dec 2012 Community outreach

Dec - Jan 2012 Review of community feedback

Jan - Feb 2013 Decision on further study for preferred option

TVWD ProcessCustomer outreach October 2012 – March 2013

Board of Commissioners’ decision for further studyApril 2013

12

Customer input will inform upcoming decisions by the District’s elected

Board of Commissioners.

Water supply planning criteriafor Hillsboro

Cost Water Quality Reliability Redundancy Ownership “Do-able” Environmental impacts Operational Complexity

Water supply planning criteria for TVWD

Finished water quality Cost and rate impact Can be right-sized Reliability Redundancy Implementation risk

Public and business acceptance

Construction impacts Sustainability Ownership / control Non-fluoridated

supply for Metzger

Future water supply optionsReservoirs GroundwaterRiver water

Purchasewholesale

water

Water conservation

Water conservation is a top priority for

TVWD and Hillsboro.

Both agencies have strong conservation programs and have decreased per capita demand by

approximately 20%.

Water conservation will continue to be important, but alone is not enough to

meet future needs.

Future water supply optionsReservoirs GroundwaterRiver water

Purchasewholesale water from

Portland

Water conservation

Future water supply optionsBarney Res. & Hagg Lake GroundwaterRiver water

Purchasewholesale water from

Portland

Water conservation

Future water supply optionsBarney Res. & Hagg Lake GroundwaterRiver water

Purchasewholesale water from

Portland

Water conservation

Future water supply optionsBarney Res. & Hagg LakeMid-Willamette River

Purchasewholesale water from

Portland

Water conservation

Groundwater

Cost and Rate Impacts

Economic analysis (present value)

Risk analysis Rate impacts

Increase Storage at Hagg Lake

Northern Groundwater

Wells

Purchase More Water from

Portland

Mid-Willamette River

0

300

600

900

1,200

Present Value

$ M

illio

ns

Present Value = construction + ongoing operating costs

22

NoteHagg Lake partners are including seismic rehabilitation cost share in all options.

Mid-Willamette River (Hillsboro’s Preferred Option)

Next Steps

Hillsboro Water Rights Study Action Plan

TVWD Board Work Sessions in March and April Board Makes a Preliminary Decision on April 24th

www.tvwd.org/your-water/long-term-water-supplies

How to Stay Informed…

www.hillsborowatersupply.org