Water Infrastructure

Willamette Water Supply System Preliminary Design

Location: Tualatin Valley, Oregon

The Tualatin Valley Water District (TVWD) plans to construct the Willamette Water Supply System with an intake near Tualatin, Oregon and piping 20 miles north to the City of Hillsboro. DEA is teamed with HDR, Inc. to provide permit support services, surveying, land use permitting strategy, and coordination with projects along the proposed alignment paths. DEA’s extensive work in Washington County includes several projects along the pipeline, which will inform the team of advantages and constraints on the proposed alternative alignments. The key objectives for this phase of the project are to identify required permitting, permitting jurisdictions, and anticipated times for approval; identify project risks, constraints, and opportunities; and refine up to three alternatives for the pipeline alignment. DEA will also conduct a land use investigation to help evaluate the alignments, crossings, storage sites, and intake facility upgrades.