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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

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Alien Plant Invader: Lesser celandine is back


Don't be fooled by the attractive blooms

lesser celandine yellow flowers


Spring is definitely early this year, and one "wildflower" is really taking off right now.  Lesser celandine is a plant that's blooming yellow flowers in many neighborhoods, and you may be tempted to transplant some to your own home.  Please don't be fooled! 

Lesser celandine is an invasive plant.  If you've seen it around, you may know this plant spreads quickly and forms dense mats that keep out other plants.  That is what makes it a risk for Portland's natural areas, stream banks and parks, not to mention the rest of your landscaping.

Read more about how to identify and manage lesser celandine in our previous blog post



lesser celandine flowers at park 

Lesser celandine covers a large area at St. Francis Park in SE Portland.





SLOUGH 101: Saturday, March 14


Learn about North and Northeast Portland's unique waterways

Join the Columbia Slough Watershed Council March 14 for Slough 101, a workshop about the Columbia Slough watershed. Slough 101 is an introduction to this unique area and covers local history, watershed health, wildlife, recreation access and current issues with eight local experts that know North and NE Portland, Gresham and Fairview. The workshop also includes hands-on activities, levee and pump station tours and macroinvertebrate identification. Participants will spend some time outdoors.

looking at water insects  people studying map of Slough

Workshops are suitable for adults and teens 14 & upPre-registration is required. The workshop is free.

Slough 101 is sponsored by the Bureau of Environmental Services and the Portland Water Bureau.

Date: March 14th (Saturday)
Time: 9am - 12: 45 pm
Light refreshments will be provided.

Multnomah County Drainage District #1
1880 NE Elrod Dr
Portland, OR 97211

Registration and information:

(503) 281-1132

Streamlining Agreement Turns 12

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The collaborative approach increases efficiency and makes regulatory decisions more consistent

This month, Portland’s groundbreaking Streamlining Agreement celebrates its 12th anniversary. Portland and federal agencies that authorize stream restoration and Endangered Species Act requirements entered into the agreement in February 2003. It was the first agreement of its kind with local government and federal regulatory agencies. Other state and local agencies signed on three years later.

The Streamlining Agreement builds a collaborative environmental permitting process, ensures early guidance in project planning, and makes permitting for in-stream construction and restoration projects more effective. In its first 12 years, the agreement led to federal, state and local governments issuing 168 permits for nearly 60 city projects.

Photo: The Streamlining Team assures that projects like the Portland-Milwaukie light rail bridge meet local, state, and federal regulations to protect endangered species and their habitats.

The Hatfield School of Government Center for Public Service recently assessed the Streamlining team process and endorsed the program. The assessment found that the agreement saves time and money, increases permitting process efficiency and makes regulatory decisions more consistent.

Photo: In 2013, the Streamlining Team was awarded the Department of State Lands Partnership Award by former Governor John Kitzhaber.

Get a little dirty for a cleaner Johnson Creek


Epic environmental restoration day needs your help!

volunteer digging Looking for a way to get outside and get dirty for a good cause? Join the hundreds of volunteers who are coming out for the Johnson Creek Watershed Council’s Watershed Wide Event on Saturday, March 7 from 9 a.m. – 12 noon.

This is the 17th year in a row for this epic feat of environmental restoration. This grassroots effort will take place at ten locations across the Johnson Creek Watershed, from southeast Portland to Damascus and Boring. Volunteers will work with the Council and its partners to plant native trees and shrubs, and learn about how invasive plants like ivy and blackberry can affect water quality.

“The Council enjoys planning this event every year and we work hard to ensure that community members that have a blast learning about Johnson Creek while also giving back. It’s a great event for the whole family – with free lunch to boot,” says Volunteer and Outreach Coordinator Amy Lodholz.

To sign up, please call 503-652-7477, or go to Johnson Creek Watershed Council website.

Special thanks to event supporters: City of GreshamClackamas County Water Environment Services, Crystal Springs Partnership, East Multnomah Soil and Water Conservation District, Friends of Tideman Johnson Park, Friends of Trees, Portland Parks & Recreation, and Portland Bureau of Environmental Services.

Five Years of Revegetation at Mt Tabor Park

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Since 2011, program partners have planted more than 2,500 native trees and 30,000 native shrubs in the historic park

This February marks the fifth season of native plantings at Mt. Tabor for the Environmental Services Watershed Revegetation Program. Since 2011, program partners have planted more than 2,500 native trees and 30,000 native shrubs in the historic park. This month, they’re planting 500 more trees and 2,800 more shrubs. These efforts are part of a wider multi-bureau and community effort to remove invasive species and restore the native trees, shrubs, and grasses that help control erosion in Mt. Tabor Park.

There are also lots of opportunities for you to contribute. Do you like to get your hands dirty? Love native plants? Become a Weed Warrior with Friends of Mt. Tabor Park and you can join in native plantings and invasive species removal. For more information, visit

Now is the perfect time to plant natives on your property. Environmental Services provides resources on native plant species, soil types, retail nursery locations, seed companies, workshops, and relevant guidebooks for all skill levels. Take a look at our Native Plants poster for more on natives, nurseries and other resources.​