Catch basins: Curbside openings that collect rainwater from streets and
serve as an entry point to the storm drain system.
Culverts: Pipe or concrete box structure that drains open channels or ditches under a
roadway or embankment.
Daylighting: to take a stream out of a culvert and allow it to flow into its natural channel.
Erosion: The detachment and transport of soil or rock fragments by water, wind, ice, etc.
Illicit Connection: Discharge of
pollutants or non-stormwater materials into storm sewer system via pipe or other
Impervious: A surface through which stormwater is incapable of passing.
Runoff: Water from rain, melted snow, or landscaping irrigation that flows
over land and into drainage facilities, local creeks, streams, and waterways. Runoff often
carries pollutants in it.
Sanitary Sewer System: A system of sewers designed to collect and transport
household and industrial wastewater from urban areas to a wastewater treatment
Stormwater: Water that runs off surfaces such as rooftops, paved streets,
highways, parking lots, gravel roads, and hard grassy surfaces like lawns and athletic fields.
Water enters the storm drainage system and eventually empties into lakes, rivers,
streams, and the ocean. Unmanaged or poorly managed stormwater can cause water
quality problems, erosion, and flooding.
Stormwater Pollution: Water from rain, irrigation, garden hoses, or other
activities that picks up pollutants, such as cigarette butts, trash, automotive
fluids, used oil, paint, fertilizers and pesticides, lawn and garden clippings, and pet waste, from streets, parking lots, driveways, and yards, and carries them
through the storm drain system and straight to waterways.
Stormwater Retention/Detention pond: A facility designed to retain stormwater runoff
for a short period of time before releasing it to the stormwater
Stormwater System: The system built to collect and transport runoff to prevent
street and property flooding. Components include drains, culverts, catch basins, and stormwater retention ponds. Anything that flows into the storm drainage system
flows directly into local creeks, streams, and waterways. Stormwater runoff is
not treated; the storm drainage system is completely separate from the sanitary
Streambank: A bank slope.
Streambank Erosion: Removal of soil particles from a bank slope primarily due
to water action. Changes in land use, climatic conditions, ice, debris, and
chemical reactions can also cause stream bank erosion.
Streambank Stabilization and Restoration: The process of building and
rebuilding the banks of streams, creeks, or rivers to prevent erosion and filter
polluted runoff. Buffers can be planted to help restore a stream bank.
Watershed: An area of land that drains runoff to a particular stream, river, lake, or