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NYC Department of Environmental Protection (DEP)

Government Agencies & Organizations
Carlos Mendez, Lead Concrete Specialist
Reviewed by Carlos Mendez Lead Concrete Specialist
NYC Department of Environmental Protection (DEP) The city agency responsible for water supply, sewers, and stormwater systems, including infrastructure that runs beneath many city sidewalks.

DEP becomes relevant to sidewalk work when a repair intersects with a water main, sewer connection, or catch basin, since work near this infrastructure may require DEP coordination or a separate permit alongside DOT's. It's also the agency behind city stormwater management efforts, like bioswales, that occasionally appear in streetscape and sidewalk design near drainage-sensitive blocks. For a typical flag replacement with no utility conflict, DEP usually isn't part of the process at all.

Water, sewer or drainage under your sidewalk?

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Frequently Asked Questions About NYC Department of Environmental Protection (DEP)

What does DEP have to do with sidewalks?
DEP manages water supply, sewers and stormwater systems, much of which runs beneath City sidewalks. Repairs intersecting that infrastructure may need DEP coordination or a separate permit.
When is DEP involved in a repair?
When work touches a water main, sewer connection, catch basin or house connection line.
What is a bioswale?
A planted stormwater feature DEP installs in the sidewalk area to absorb runoff. They appear on drainage-sensitive blocks as part of green infrastructure.
Does a standard flag replacement involve DEP?
Usually not, if there is no utility conflict.
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