In November and December, Portland Water Bureau crews will start digging to allow for an exploratory drill to be placed in a parking lot at 1720 S.W. Naito Parkway between Harrison and Market streets related to the Willamette River Crossing project. Between 2020 and 2022, the bureau will be installing an earthquake-resilient water pipe deep under the Willamette River.
Beginning in late October and continuing through 2020, this work will have occasional traffic impacts on those traveling along Southwest Naito Parkway and Harbor Drive. Please prepare for the following changes to traffic. Businesses along Naito Parkway will remain open during construction.
- Southbound Harbor Drive: Beginning in late October through the end of the year, the right-hand lane of southbound Harbor Drive and single lanes on streets that approach Harbor Drive will be closed as crews excavate and build a temporary wall. Closures are from 9 a.m. to 3 p.m. Monday-Saturday. Travelers may experience delays along southbound Harbor Drive as equipment is loaded onto the site.
- S.W. Naito Parkway (both directions): Beginning in October, and continuing through April, crews will work in Southwest Naito to prepare the water system for the new pipe.
- In October and November, travelers can expect occasional one-day lane closures as crews work to locate underground utilities.
- Starting in January, construction will temporarily close one lane in each direction to install a new pipe. Travelers should expect delays. Traffic will continue to flow in the remaining lane in each direction.
- During this time, six maple trees along Naito between Harrison and Market streets that were previously approved for removal as part of the Portland Bureau of Transportation’s Southwest Naito Parkway Improvement Project will be taken out to allow the Water Bureau to bring equipment onto the worksite. After construction on Naito Parkway is completed, the Portland Bureau of Transportation has committed to an extensive replanting plan in accordance with their permit.
- In the spring of 2020, the Portland Bureau of Transportation will begin the Southwest Naito Parkway Improvement Project, which will have additional traffic and tree removal impacts. These are outlined at portlandoregon.gov/transportation/swnaito.
The traveling public is reminded to stay alert and use caution as traffic may suddenly slow or stop. Please allow extra time when traveling through the area. Follow all signs and flagger directions to ensure everyone's safety. To avoid traffic delays, motorists are encouraged to use alternate routes around the worksite.
About the Willamette River Crossing Project
Portland’s water mains (pipes) that cross the Willamette River are more than 50 years old and will probably not survive a major earthquake. As part of the Portland Water Bureau’s commitment to preparedness, we are installing an earthquake-resilient water pipe deep under the Willamette River. This new water pipe will help ensure that we can deliver safe and abundant water to the west side, even after an earthquake.
This project is currently in the design and exploration phase. This phase includes locating underground utilities and conducting a geotechnical probe, which will provide important information about soil deep underground and help us confirm the best path across the river.