Stormwater management - Southwest Washington

Drywell lid

Drywell lid (sometimes this lid is also a manhole or closed detention vault)

Vault lid

Vault lid

Curb inlet

Catch basin - curb inlet

Storm drain

Catch basin - storm drain






Underground facilities and structures

Underground catch basins/storm drains, manholes, vaults and drywells are invisible except for a manhole cover or inlet grate.

Underground structures are used to trap sediment and debris, allowing stormwater to soak into the ground and filter pollutants. They are used as a junction between pipes to route stormwater.

- Wet facilities
- Dry facilities

- Introduction to recognizing facilities on your property