Stormwater management - Southwest Washington






A manhole is an underground concrete structure typically fitted with a solid lid. It collects stormwater runoff and routes it through underground pipes, allowing sediment and debris to settle. It also can be used as a junction in a pipe system to allow access.

Manhole – is a round, concrete structure typically ranging in diameter from 4 feet to 8 feet. It is an access point for underground pipe maintenance. Manholes generally have steps mounted on the side for easy access.

Manholes are built into almost all stormwater systems.

Signs that maintenance is needed and a checklist for maintaining the facility including how to fix problems.