Tualatin Basin Water Supply

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Public Health

Having a reliable water supply is very important to our communities and the region. Scoggins Dam is the centerpiece of Washington County’s water supply and a major asset to the region.

More than 15 years ago, community leaders started working on the Tualatin Basin Water Supply Project and identified a dam raise alternative to store more water for the region.

It makes little sense to invest hundreds of millions of dollars to secure a dam without simultaneously allowing for increased water supply. The sustained and recurring droughts in Oregon and other western states underscore the need to address not only the threat of earthquakes but also the threat of water shortages. The integration of Reclamation’s Safety of Dams improvements with the Tualatin Basin Water Supply Project would allow federal, state and local agencies to leverage their shared investments in order to protect public safety, secure the region’s primary water supply and meet the long-term needs of our community.

Water from Hagg Lake...

Provides drinking water for 400,000 residents
Irrigates 17,000 acres of cropland
Sustain water quality for Fish & wildlife in the Tualatin River

Frequently Asked Questions

>Who is paying for this and how much will it raise my water bill?
: The U.S. Bureau of Reclamation will fund the project, and 15% of the seismic improvement costs will be repaid by the local partners that share the water in Hagg Lake (Tualatin Valley Irrigation District, Clean Water Services, Lake Oswego Corporation, and the Cities of Hillsboro, Beaverton and Forest Grove).
>Why aren’t big businesses that will be using most of the water paying for the project?
The businesses, industry and agriculture that depend on Hagg Lake water are the backbone of our region’s economy. They will pay their share of the project just as residential customers will through water and sewer charges. As communities grow, new customers will pay system development charges that will help pay for the improved safety and reliability of our water supply.
>How will you help customers, especially those on fixed incomes, pay higher water rates?
Clean Water Services aggressively controls costs and rate increases to provide cost-effective and environmentally responsive services to all our ratepayers. In the past decade we have been building a reserve to help offset the cost of the project and keep rates reasonable.