Post on 29-Mar-2015
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