Pre-existing infrastructure of cities and towns in the US

It uses gutters, pipes and tunnels to convey stormwater away from site to treatment plant

Many systems in the United States are composed of gray infrastructure

• Largest influence: Urbanization

Examples include dams, seawalls, etc.

Man-made systems whose purpose is to filter and absorb stormwater

Major tools to build these include native plants, native soils, permeable pavement, minimal piping, etc.

Help store stormwater for reuse for consumption and public use

Main function is to reduce storm runoff

Example: Rain gardens, bio-swales, storm water planters, green roofs