Stormwater management - Southwest Washington

Infiltration basin

Infiltration basin is an open basin that holds water while it soaks into the ground.

Biofiltration swale

Biofiltration swale is a flat-bottomed channel where pollutants are removed by filtration, infiltration, and settling.

Detention pond

Detention pond Stormwater is temporarily stored and slowly released through an outlet pipe. Natural-appearing vegetation is common.

Filter strip

Filter strip is a strip of grass along paved areas such as a road or parking lot. Contaminants are filtered out of the water as it flows away.

 

 

FACILITIES - RECOGNIZING YOUR FACILITY

Dry facilities

Dry most of the time, these facilities contain water during and after rain storms. Water should disappear within three days after the rain stops.

- Wet facilities
- Underground structures and facilities

- Introduction to recognizing facilities on your property