Green Stormwater Infrastructure

Green Streets & Green Stormwater Infrastructure (GSI)

Urban development traditionally involves replacing natural landscapes with solid pavements and storm drain systems - causing increased amounts of polluted stormwater to flow directly into local streams. Green Stormwater Infrastructure (GSI), however, uses plants and soils and techniques such as permeable pavers to mimic natural watershed processes. This helps to capture stormwater and infiltrate it, to create healthier environments. Benefits include:
Landscaped areas and pervious surfaces capture runoff, reducing the quantity of pollutants flowing into local creeks. Runoff and pollutants flow directly into local creeks via storm drains.

  • Added beauty to local streetscapes
  • Bicyclist and pedestrian safety
  • Improved traffic
  • Improved water quality
  • Increased stored water supply
  • Reduced local flooding
  • Wildlife habitat

Low Impact Development

With so many benefits, green stormwater infrastructure is a priority for state and local water quality agencies, including the Authority and its member agencies. Municipalities are integrating Low Impact Development (LID) designs into new and existing public spaces, including streets, plazas, parking lots, and parks. These designs minimize impervious cover and store/treat stormwater similar to pre-development site conditions.   

This implementation of LID reduces the amount of urban runoff and pollutants draining into creeks. Currently, the Authority is working with the four West Valley agencies to develop the many required elements of each agency’s GSI Plan by the State’s September 30, 2019 deadline. As these efforts continue over the coming years, GSI facilities will become an increasingly common aspect of the urban landscape.

On July 16, 2019, the Campbell City Council approved the City's Green Stormwater Infrastructure Plan that demonstrates their long-term commitment to implementation of green stormwater infrastructure.

Hacienda Avenue

View a map of local public projects that use green stormwater features. An example of a local award-winning green street in the City of Campbell is the reconstruction of Hacienda Avenue from Winchester Boulevard to Burrows Road. This redeveloped one-mile stretch of Hacienda Avenue (Winchester Boulevard to Burrows Road) features 63 biotreatment areas, street trees, and bike lanes.

More Information

See how green stormwater features help our community. Learn how you can incorporate some of these features into your own yard and garden.