Errol Heights and Wetlands

Project Description

This 16 acre site has diverse habitats with high ecological potential: wetlands, ponds, meadows, and a natural spring. The City of Portland's Parks and Recreation acquired part of the land in the project area through several acquisitions over time, with original parcels zoned as protected environmental lands. The site was covered in invasive species and had been used as an illegal dump. In the mid-1990's, community groups including: Friends of Errol Heights, Friends of Trees, Johnson Creek Watershed Council, and Portland Parks, began removing debris, clearing invasive species and pla...

Project Map

Publicly Accessible: Yes
County: Multnomah County, OR
Project Size:
  • 13.59 acres
  • 0.16 miles

Project Sites

  • Errol Heights
  • Land acquisition
  • Stream meander
  • Stream meander

Goals and Targets

Primary Motivations:

  • Conservation Mission
    "To inspire and facilitate community investment in the Johnson Creek Watershed for the protection and enhancement of its natural resources." --mission statement of Johnson Creek Watershed Council "SOLV brings Oregonians together to improve the environment and provide a legacy of stewardship." --Mission Statement of SOLV
  • Personal Interest
    neighborhood groups have been heavily involved in this project.

Primary Goals:

  • Remove garbage and debris
    Progress: Several dumpsters, including refrigerators, tires and a bus have been removed from the site.
  • Control Invasive Plants
    Progress: Blackberry and reed canary grass and other invasives have been treated, and though much reduced are still present at the site.
  • Establish Native Plants
    Progress: Thousands of plants have been planted on the site, including red osier dogwood, red alder, Oregon ash, swamp rose and hardhack in the wetland understory, and madrone and white oak in the uplands
  • Restore wetland function
    Progress: Wood placed in the creek in 1998 reduced downcutting of the channel bed and allowed water to overspill the banks into the historical floodplain and surrounding wetland. The area is now a seasonal wetland with a well established plant community.

Consistent With Plans:

  • Watershed Plan
    Johnson Creek Watershed Action Plan (JCWC) Johnson Creek Restoration Plan (BES)

Targeted Habitats:

  • Aquatic
    • Rivers and Streams
  • Human Habitats
    • Urban and Residential
      • Suburban Habitats (Moderate Intensity Developed)
  • Wetlands and Riparian Habitats

Targeted Species:

  • Common Large Monkeyflower Mimulus guttatus
  • Cooper's Hawk Accipiter cooperii
  • Ensatina Ensatina eschscholtzii
  • Lodgepole Pine Pinus contorta
  • Rainbow Trout or Steelhead Oncorhynchus mykiss
  • Western Trillium Trillium ovatum

Conservation Actions

Action Status Start Year End Year
Plant native riparian, wetland or aquatic vegetation Completed 1996 2006
Control invasive plants Ongoing Management 1996 2014
Improve the function of an existing wetland Ongoing Management 1996 2014
Remove litter and waste Completed 1997 1997
Plant native trees and/or shrubs, herbs, forbs, grasses In Progress 1996 2012
Remove litter and waste Completed 2006 2006
Land acquisition for conservation (fee simple, etc.) Completed 1992 1992
1 Property


Is the success of this project's actions being monitored? Yes

Monitoring Activities
As of 2006, Friends of Trees was performing annual maintenance. See also: "Site Treatment Report from BES Watershed Revegetation Program", 2006 Project Assessment, and "2011 Johnson Creek Watershed Council Survey Results" also attached under "Project Documents", at right. For a full report of the Portland Bureau of Environmental Services monitoring efforts see BES Restoration Effectiveness pdf attached under "Project Documents."

Lessons Learned and/or Suggestions for Similar Activities
The WRP has noted that on a project level, planted species tend to perform better in the wet areas of the site, while plants exhibit less vigor in upland sections of the site.

Quick Facts

Owning Organization

Johnson Creek Watershed Council

Managing Organization

City of Portland
(Local Government)

Contact Information

Mart Hughes (Natural Resource Ecologist)
Portland Parks and Recreation

General Information

Project #: 15308
Last Updated: April 01, 2015

Project Relations


Brentwood-Darlington Community Policing Center
City of Portland Bureau of Environmental Services' (BES') Watershed Revegetation Program (WRP)
City of Portland Parks and Recreation
Friends of Errol Heights
Friends of Trees
Johnson Creek Watershed Council
Portland General Electric
ROSE Community Development Corp
University of Oregon


City of Portland Watershed Revegetation Program
City of Portland Watershed Services
Errol Heights Master Plan 2006

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