Catch basin A curbside storm drain inlet containing a grated opening and an underground settling basin designed to capture rainwater and direct it into the municipal sewer system.
Catch basins are critical components of NYC's public stormwater infrastructure, usually situated at street corners. During sidewalk or curb reconstructions, contractors must ensure the pavement slopes perfectly toward these grates. If a sidewalk is poured incorrectly and blocks water from reaching the catch basin, it will create localized pooling, leading to dangerous winter ice patches and immediate DOT code violations. Resource link: nyc.gov/dep
Frequently Asked Questions About Catch basin
What is a catch basin?
A curbside storm drain inlet with a grate and an underground settling chamber that collects street runoff and routes it into the sewer system.
How does it affect sidewalk work?
The finished grades must let water reach the grate. Work that blocks or redirects flow creates ponding and can be cited.
Who maintains catch basins?
They are part of the City's stormwater infrastructure, managed by DEP. Private contractors should not alter them without coordination.
What happens if one is blocked?
Water backs up along the curb, ponding at crossings and freezing into ice in winter. Blockages can be reported through 311.