Urban tree canopy and other vegetation (also called Green Stormwater Infrastructure (or GSI)) mitigates stormwater run-off by intercepting precipitation which can be absorbed by the vegetation and infiltrated into the soil.  This results in reduced run-off during heavy rain events which in-turn reduces the cost of traditional stormwater infrastructure (gray infrastructure) and reduces water pollution into our rivers and streams.  

Treasure Valley's tree canopy mitigates 125 million gallons of stormwater annually, saving $1.1 million in infrastructure costs.  Through future strategic tree planting (showcased below), we can further improve stormwater benefits throughout our region.  

Learn more about local GSI planning efforts.

25th Street - current condition Credit - Ada County Highway District (ACHD)

25th Street - current condition

Credit - Ada County Highway District (ACHD)

25th Street with GSI installation Credit - Ada County Highway District (ACHD)

25th Street with GSI installation

Credit - Ada County Highway District (ACHD)

Local Green Stormwater Infrastructure (GSI) Resources created by our partners: