A Look at Long-Term Water Supply in Washington County City of Hillsboro & Tualatin Valley Water District March 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 System Serving 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 futurejust like predecessors did for us. Million Gallons per Day Hillsboro will need twice as much water in the next 50 years as available today.

TVWD Looks Ahead We have enough water for todaybut need to take steps to have enough water to meet future demands. Million Gallons per Day 82,000 new residents by More jobs and businesses too. Current Peak Day Water Supply

Where do communities get water? Reservoirs Groundwater River water Purchase wholesale water Water conservation

Hillsboro relies on a River and Reservoirs in Tualatin/Trask Watersheds No redundancy in current Hillsboro system Barney ReservoirHagg LakeUpper 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.

Hillsboros Supply Study Process Feb 2010-Sept 2012 Supply options research Sep - Dec 2012Community outreach Dec - Jan 2012Review of community feedback Jan - Feb 2013Decision on further study for preferred option

TVWD Process Customer outreach October 2012 – March 2013 Board of Commissioners decision for further study April Customer input will inform upcoming decisions by the Districts elected Board of Commissioners.

Water supply planning criteria for 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 options Reservoirs Groundwater River water Purchase wholesale 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 options Reservoirs Groundwater River water Purchase wholesale water from Portland Water conservation

Future water supply options Barney Res. & Hagg Lake Groundwater River water Purchase wholesale water from Portland Water conservation

Future water supply options Barney Res. & Hagg Lake Groundwater River water Purchase wholesale water from Portland Water conservation

Future water supply options Barney Res. & Hagg Lake Mid-Willamette River Purchase wholesale water from Portland Water conservation Groundwater

Cost and Rate Impacts Economic analysis (present value) Risk analysis Rate impacts $ Millions Present Value = construction + ongoing operating costs 22 Note Hagg Lake partners are including seismic rehabilitation cost share in all options.

Mid-Willamette River (Hillsboros 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

How to Stay Informed…