Drainage Maintenance

Report a drainage, maintenance, or flooding issue

To report a drainage, maintenance, or flooding issue, during normal business hours from 6:30 a.m. to 3 p.m., call 910-341-4646.

However, if any of these specific conditions occur within the city limits after business hours or on weekends or holidays:

  • Observed Road or Structural Flooding

  • Sink Holes

  • Missing Manhole Covers on City Streets

Please call the New Hanover County non-emergency number at 910.452.6120. They will contact our on-call stormwater crews. 


In Wilmington, stormwater runoff is channeled through a complex system of storm drains, pipes, ditches, ponds, culverts, creeks and wetlands which flow straight into our waterways. Stormwater Services field crews perform maintenance of the storm drainage system within the public right-of-way or in accepted easements.

Stormwater Services maintains the stormwater drainage system including:

  • 20,337 Catch Basins and Manholes
  • 343.41 miles of pipes and culverts
  • 225.26 miles of open drainage (ditches and channels)
  • 46.37 acres of retention ponds
  • 167.65 acres of Stormwater Control Measures (SCMs) including Kerr Avenue Wetland, Park Avenue Bioretention, Wade Wetland, Dock Street Rain Gardens, etc.

Maintenance Field Crews

Street Sweeping Crew

Closeup of street sweeper brush.

Sweep curbed City streets and North Carolina DOT streets, public parking lots, and when required, non-curbed streets. Private streets are the responsibility of the Homeowner's Association or Developer. This crew also inspects and removes blockages from the stormwater drainage system.


SCM Maintenance Crew

Worker cleaning litter from a wet pond.Maintain 70+ stormwater SCMs (Stormwater Control Measures) including constructed wetlands, bioretention areas, rain gardens, infiltration swales, retention ponds, and streambank stabilization.

Open Drainage Crew

Workers in a stormwater ditch.Perform routine mowing, ditch cleaning and erosion control activities of drainage ditches, creeks, lakes and ponds, as well as sediment removal and control of nuisance aquatic weed growth.

Closed Drainage Crew

A long, wide stormwater pipe unearthed from under a street.Perform inspection, maintenance, repair and construction of underground pipes, manholes, catch basins, junction boxes and headwalls, as well as deep excavations requiring the use of trench boxes. Crews clean and inspect stormwater pipes and infrastructure using cameras and VacCon trucks and perform internal pipe repairs using confined space entry protocols.