Natural Resources Inventory
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DRAFT3c. Natural Resources Inventory

Inventory of Significant Natural Resources
Natural Resources Inventory (PDF)
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The updated Natural Resource Inventory maps the riparian corridors and wildlife habitat areas in Portland and assesses their relative quantity and functionality. The inventory indicates that significant natural resources make up one-third of the area of the city. This includes approximately 242 river and stream miles, about 2,450 wetland acres, and roughly 19,515 acres of forest and woodland areas one acre or larger. Most of these resources are concentrated in several large areas listed below.

  • Forest Park
  • Tryon Creek State Park
  • Smith and Bybee Wetlands
  • Headwaters and riparian areas of Tryon, Fanno, and Balch Creek watersheds
  • Along the sloughs and wetlands of the Columbia Corridor
  • Along streams and wetlands in the Johnson Creek watershed
  • Upland east side buttes
  • The Willamette River and its associated vegetated riparian corridors, wetlands, wooded eastside bluffs and Ross Island

For more information see the Natural Resources Background Report Overview