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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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Environmental Plans

Portland Plant List

Updated: July 1, 2010. This guide to the native and nuisance plant species found in Portland and the metro region describes the ecological and social benefits provided by natives, as well as impacts and risks associated with the spread of invasives

Invasive Plant Policy Review and Regulatory Improvement Project

Adopted by City Council, Ordinance No. 183534, Effective July 1, 2010 and July 1, 2011

NW Hills Natural Areas Protection Plan - 1995

Revisions to Clarify the ESEE Analysis

Environmental Code Improvement Project: Adopted Report - 2005

Ordinance 179540, effective September 26, 2005

Natural Resource Inventory Update Reports and Documents

The Natural Resource Inventory Update Project is a citywide project to revise and update existing information on natural resources (trees, streams, wildlife habitat, etc.) in Portland.