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The Road Side/Off Road Ditch Maintenance Section is responsible for the cleaning/regrading of roadside ditches, including flushing culverts under driveways and streets. While the City Code of Ordinances mandates abutting property owners maintain ditches free of debris, the branch will regrade ditches that become heavily silted. Culverts are also flushed during this activity. New culverts or culverts that are damaged or undersized under residential or commercial driveways are the property owner’s responsibility for replacement. Many off-road drainage ditches are cleaned and regraded by the branch. These off-road ditches collect storm water from many smaller ditches and storm sewers and transport it to larger ditches and/or bayous maintained by the Harris County Flood Control District.

The Storm Sewer Maintenance Section handles the operation and maintenance of the City's storm sewer system, including task such as cleaning manholes and inlets and replacing missing manhole covers. The storm sewer system is very different from the sanitary sewer system that carries waste from your home. These sewers are designed only for storm water and empty directly into major ditches and bayous. This section is also responsible for entering storm sewers to remove debris and objects that can block the storm sewer; the “Confined Space Entry” team performs this function. Citizens are reminded to never dispose of grass clippings, motor oil, or other items in the storm sewer.

The NPDES (National Pollutant Discharge Elimination System) Section monitors and inspects runoff from manufacturers and industrial businesses to prevent pollutants from entering our streams and bayous. Also, in support of the city's National Pollutant Discharge Elimination System Stormwater Permit, the city will conduct various tasks including investigations of illegal discharges to the storm water system and disposal of household hazardous waste through the Solid Waste Department’s Environmental Service Centers.