One is for work on a second reservoir on Cooper Mountain; the other is for a pipeline as part of the regional program that will enable to city to draw water from the Willamette River by 2026.

The City Council has authorized Mayor Denny Doyle to sign two engineering contracts for projects to ensure Beaverton's future water supplies.

One contract is with Murraysmith Inc. of Portland for design of a second 5.5-million-gallon reservoir on Cooper Mountain and related improvements. The contract is for $3.1 million, but the amount for the current budget year is $500,000. The rest will be budgeted for 2019-20.

The other contract is with Kennedy/Jenks Consultants of Portland for design and construction engineering of a 24-inch intertie pipeline between Tualatin Valley Highway/Cornelius Pass Road and Southwest 209th Avenue. The contract is for $457,983 — and the pipeline is part of the Willamette Water Supply Program that involves Beaverton, Hillsboro, Tigard, Sherwood, Wilsonville and the Tualatin Valley Water District.

"There are many millions of dollars that we are spending on improving our water system," Councilor Mark Fagin said of the contracts, which were on the council's consent agenda July 17.

"It's improving it not only for the areas that are just developing on South Cooper Mountain, but also improving the resiliency of the water delivery system for all of us."

Cooper Mountain already has a 5.5-million-gallon reservoir completed in 1994. It serves about 16,000 residents by gravity in the upper elevations of Beaverton, and indirectly, 55,000 more on the valley floor.

Previous engineering studies have projected that future growth in water demand could exceed existing capacity by 2020, necessitating a second twin reservoir.

Beaverton is asking the Metro Council, Portland's regional government, to extend the urban growth boundary into the upper elevations of South Cooper Mountain by the end of this year. That step could add 8,000 people to the city, in addition to the 8,000 people in lower-elevation areas that the city annexed in 2014 and are likely to be served by the existing reservoir.

Once the design of the second reservoir and associated improvements is complete, the project will be funded with $23.9 million in recently issued revenue bonds that will be repaid by city water customers.

The other engineering contract is for a part of the regional intertie system that eventually will allow Beaverton to draw up to 5 million gallons of water per day from the Willamette River by 2026.

Construction costs for the 24-inch pipeline are estimated at $3 million to $4 million, also likely to come from water customers.

The Willamette Water Supply Program is intended to enable Beaverton and other cities to secure water if a severe earthquake off the Oregon coast disrupts other supplies. The City Council approved Beaverton's participation on Feb. 27.

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