1120 SW 5th Avenue, Suite 1000, Portland, OR 97204
The Willamette Watershed includes Forest Park, downtown Portland, industrial districts on both sides of the river, and the city’s most densely populated residential neighborhoods. It extends from near Sauvie Island to just north of Lake Oswego and from the West Hills to the suburban neighborhoods east of I-205.
Resource center programs and resources
Oregon's largest watershed
How the Willamette River developed
Actions for watershed health
Restoration projects in the watershed
2010 Technical Memorandum (PDF Document, 11,721kb)
2011 Technical Memorandum
An early map of Portland
A serious security vulnerability known as "Heartbleed" was recently discovered in OpenSSL, a popular software library commonly used by many websites on the internet to encrypt communication between a user's computer and a web server.
PortlandOregon.gov is NOT affected by this vulnerability as it does not use the OpenSSL software library. Please rest assured we are dedicated to protecting your security on this website.