When a city or subdivision is developed, there is usually a plan to collect and convey stormwater runoff away from buildings.  Normally, the buildings are located on a site higher than the property line and street.  Runoff drains downhill to the property line and then on to the street or storm drains (see graphic below, left side).  The drainage system then conveys the water to ditches, streams, and canals.

Problems arise when the drainage system is blocked.  This can be on the property itself, such as when the pathway to the street and storm drains is blocked by filling, regrading, fences, or other obstructions (see graphic below, right side).  These problems can be fixed by returning the lot's grading and drainageways to their proper condition.

Another problem is dumping in open drains, ditches, streams, and canals.  Every piece of trash can contribute to flooding.  Even leaves, grass clippings, and branches can accumulate, plug storm drain inlets and channels, or kill vegetation and contribute to erosion.  If your property is next to a ditch or storage basin, do your part and keep the banks and storm drains clear of brush and debris.

Do not dump or throw anything into the storm sewers, inlets, ditches, or basins.  Dumping in ditches, storage basins, and wetlands is a code violation,  If you see dumping or debris in the ditches or basins, filling or construction near the property lot lines, or filling or construction in a mapped floodplain without a permit sign posted, contact you local permit department.  The debris or project may cause flooding on your property.