Portland Urban Forest Fact Sheet
|Land area by acres*||85,964|
+Based on the 2010 U.S. Census
*Courtesy of The Trust for Public Land
Portland Urban Forest Facts*
- The city has approximately 1.4 million trees, representing more than 170 different species.
- The most common tree species are broadleaf deciduous trees, which account for 85
- percent of street trees and 77 percent of park trees.
- Approximately 50 percent of the city’s trees are less than six inches in diameter, and less than 10 percent of the city’s trees are greater than 30 inches in diameter.
- The city’s street and park trees cost around $6.5 million per year to maintain, but provide nearly $27 million in benefits, which is a $3.80 return on every dollar invested.
- Portland’s urban forest:
- Provides more than $38 million in environmental benefits.
- Removes approximately two million pounds of pollutants and 53 million pounds of carbon from the air, valued at more than $3 million.
- Stores about 1.5 billion tons of carbon.
- Portland’s street and park trees:
- Intercept about 0.5 billion tons of water annually, saving an estimated $11 million in stormwater processing.
- Save approximately $750,000 in energy costs.
- Adds more than $13 million, cumulatively, in property resale value.
- Have a structural value of $5 billion.
- Portland’s urban tree canopy is 29.9 percent.+
* As reported in “Portland’s Urban Forest Canopy Assessment and Public Tree Evaluation,” prepared in 2007 by Portland Parks & Recreation
+ As reported to American Forests in its survey of the 50 most populous U.S. cities.
Top 10 Criteria
|Urban Forest Management Plan||Yes, first completed in 2004 and updated every 10 years|
|Urban Canopy Goal||Yes, mandated by the city government and tied to several of its comprehensive plans|
|Quality of Urban Forest Compared to Others in Region||Normal, which means some biotic damage and invasive species, some anthropogenic disturbance and some chemical and runoff issues|
|Tree Inventory||Yes, covering public land|
|Tree Species Diversity Plan||Yes|
|Tree Ordinances||Yes, for both public and private lands covering hazard and historic trees|
|Comprehensive Greening Plans||Yes, including a Sustainability Plan, Climate Change Plan and Green Infrastructure Plan|
|Types of Greening Initiatives||Protection of open spaces; natural resource restoration; urban forests as part of planning for runoff, erosion and/or flooding; green jobs training; active involvement of environmental stewardship groups|
|Park Acres per 1,000 People||23.75|
|Percentage of Land as Park||16.13|
|Quality of Civic Engagement||Good, with citywide stewardship and neighborhood interactions|
|Tree City USA*||Yes|
|Conference of Mayors Climate Protection Agreement Signatory||Yes|
*Designation awarded by The Arbor Day Foundation to cities that have a tree board or department, a tree care ordinance, a community forestry program with an annual budget of at least $2 per capita and an Arbor Day observance and proclamation.