Detention or Retention Basins are designed to prevent flooding by capturing, holding,
and slowly releasing stormwater. These basins also help protect water quality in streams
and lakes by trapping sediment.
Who’s responsible for maintenance?
Initially, developers have responsibility. After public infrastructure is installed, the City
returns the escrow to the developer and maintenance responsibilities are turned over to the
homeowner’s association (HOA) per subdivision covenants. HOAs own the grounds and are
responsible for unblocking basins and removing litter and mud to prevent flooding and pollution.
The City owns and repairs public infrastructure (i.e., pipes and structures leading to and exiting
from the basin).
Is my basin supposed to hold water?
Yes, basins are designed to hold large storm events and let water out slowly through the outfall
structure to protect downstream waterways and property.
Why is my lake/basin full of mud?
If the subdivision is completely built, it is probably a basin that is designed to capture and slowly
release stormwater while trapping sediment. Over time, detention and retention basins fill up
with mud and need to be cleaned out/dredged to remain functional and prevent pollution. If
excessive mud is coming from construction, please call the City.