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The City of Portland, Oregon

Portland, Oregon

Welcome to the official web site of the City of Portland, Oregon

General Information: 503-823-4000


1221 SW 4th Avenue, Room 110, Portland, OR 97204

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The Mason Flats Wetland is flourishing

June 25, 2014

A once-neglected field filled with invasive species has bloomed into one of our loveliest watershed restoration sites. 

In early 2013, the Bureau of Environmental Services (BES) completed the Mason Flats Wetland Enhancement Project. The area manages stormwater runoff from over 600 acres of residential and commercial streets in Northeast Portland.  By natural filtration, pollutants are reduced, and the wetland and its critters can remain healthy!

Today, the Mason Flats is flourishing with beautiful wild flowers and greenery.  Because it’s a restoration area in progress, the wetland is not open to the public. However, it’s part of the Big Four Corners Natural Area, which has viewing sites and access points. 

Visit BES’ website for maps and more information.