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Tree Canopy
Tree Canopy MapIssaquah’s tree canopy calculation includes only those areas within the City limits. It is a rough estimate intended to serve as a baseline for future measurements of the tree canopy, which will be used for the City’s climate change projects and tree preservation goals.

Background
The calculation was done as follows, using 2006 aerial photos:
  • The 100 percent tree coverage areas were identified, such as Park Pointe, Tradition Lake Plateau and South Talus.
  • The 90 percent tree coverage areas were identified as low density residential, such as Squak Mountain, South Cove/Greenwood Point and Overdale. The 90 percent was determined by using a small sample area to determine the average percent coverage and multiplying that times the overall areas.
  • While the protected areas outside the city (such as Issaquah 69, west of the Forest Rim neighborhood) were identified on the map, they were not used in the tree canopy calculation.
  • About 40 percent of the City has 100 percent coverage.
  • About 16.6 percent of the City has about 90 percent coverage.
  • The City had 7,047 acres in 2006, so the approximate tree canopy is 51 percent.