Open Space Areas
The City of Mercer Island has been actively restoring native trees and vegetation in 300+ acres of public open space over the past ten years. This work has been guided by the 2004 Open Space Vegetation Plan. In March 2015, Mercer Island City Council adopted a plan update to reassess of the status of the open space in order to evaluate progress and recommend plan changes.
The Open Space Vegetation Plan 10-Year Evaluation and Update reports significant progress. Invasive cover has been reduced by 50% over the past ten years, and native conifer regeneration averages 78 trees per acre, up from near zero in 2004. This update also includes a climate adaptation strategy to anticipate the rapid rise in atmospheric temperature anticipated over the next 100 years and the profound impacts that will have on forest ecology.
Learn more about the City's invasive knotweed program.
Lean more about the City's use of herbicide.
View the Current Restoration & Stewardship Event Calendar.
Forest Restoration Progress in Open Spaces
|Ivy survival rings created
|Total acres worked
Printable copy of the Open Space Vegetation Plan
Printable copy of the appendices to the Open Space Vegetation Plan
Printable copy of the Open Space Vegetation Progress Report for 2005
Printable copy of the Open Space Vegetation Progress Report for 2007-08
Printable copy of the Open Space Vegetation Progress Report for 2009-10
Printable copy of the Open Space Vegetation Progress Report for 2011-12
Tree Canopy Coverage Assessment (2018) Summary
Tree Canopy Coverage Assessment (2018) Full Report