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Stantec to lead $51m design work for Bull Run Filtration Project in Portland, Oregon

Stantec, in association with Carollo Engineers and other local firms, has been selected by the Portland Water Bureau (PWB) for on-site design services for the Bull Run Filtration Project.

The $51 million, five-year design contract includes on-site design, geotechnical site investigation, design quality management, assistance during construction, CM/GC support and interactions, assistance during commissioning and operations support, and project management for the filtration design.

Construction is anticipated to begin in 2022 and must be completed by 2027 as part of the bilateral compliance agreement with the Oregon Health Authority.

Latest  cost estimate for the whole scheme of $820 million presented in November 2019 reflects a variety of site-specific cost variables and a balance of costs with benefits – the initial cost estimate was $500 million.

Portland Water Bureau said that project cost estimates will continue to improve as the project works through design and construction costs are determined.

The project also includes a collaboration with PWB and a Program Management/Support Services consultant to integrate the new facility into the existing infrastructure. The City’s plans for the filtration facility include technology to remove cryptosporidium from the drinking water and provide treatment capacity of 145 million gallons of water per day – enough to meet growing population demands through 2045.

When the facility comes online in 2027, it will be Portland’s first filtration system.

The filtration facility will feature conventional treatment, oxidation, mechanical solids dewatering, and resilience features to provide greater flexibility for future risks posed by climate change and seismic events.

The facility will remove sediment, organic material, and other potential contaminants, providing consistent high-quality drinking water and making the water system more reliable. The inclusion of smart instrumentation technologies will integrate various treatment and distribution system data to provide real-time awareness for proactive, system-wide control to be consistent with City sustainability policies. All newly proposed occupied buildings will be designed to achieve LEED-Gold certification.

“This new facility will help us continue to provide clean, safe water for the nearly one million people who use our resources, and make the Bull Run supply more reliable and resilient for future generations” said PWB Water Bureau Director Mike Stuhr.

The primary source of water for the City of Portland is the 102 square mile Bull Run Watershed, located approximately 22 miles east of the city in the Mount Hood National Forest.

In addition to serving more than 650,000 residents, the city has wholesale contracts with 19 area water providers who serve another 300,000 people in the Portland Metropolitan area, including the cities of Gresham, Sandy, and Tualatin.

The facility’s location – just outside the Bull Run Watershed in rural Multnomah County – sits at the right elevation to work with existing water infrastructure and the property is large enough to provide a buffer between the facility and its neighbors.


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