When a new neighborhood or office building is constructed, the natural flow of the land is disturbed. Most of the trees, natural grass and soil are destroyed and replaced with concrete, pavement, sidewalks and other unnatural structures. The topography of the land is likely altered and the former natural flow of water has now been dramatically changed.

The direct result of all the changes is that rainwater that used to be soaked up by the natural land will now flow off the developed land at a much faster rate. The amount of water flowing out of gutters, down driveways, streets and parking lots is much larger then the land can handle. In order to handle the rapid rate of water runoff, both residential and commercial properties are required to establish and maintain retention or detention ponds.

In the State of Georgia and many other states, the Homeowners Associations (HOA’s) and property management companies are required to maintain the retention and detention ponds to ensure that all rainwater on any given property is collected in a manner that does not disturb the surrounding land.

All retention ponds are subject to annual or biannual city or county inspections. The inspector will want to see the retention pond is capable of running at full capacity and that the retention or detention pond meets most of the requirements that we discuss below.

Retention and detention ponds need periodic maintenance. If you are a property manager or part of a homeowners association, you will want to ensure that your retention or detention pond is cleaned out on a regular basis to ensure compliance with city and county codes.

Retention Pond or Detention Pond Maintenance Checklist

• Keep the earth and dam around your retention pond in good order. The vegetation around your retention pond will reduce the pollutants in the storm water; however, the vegetation should be well maintained and any overgrowth should be reduced. It is also a good idea to remove any new trees that may cause future problems.

• On a periodic basis remove any debris and any silt buildup from your retention pond.

• Communicate with the homeowners in your neighborhood or the tenants in your commercial space and make sure everyone understands the importance of reducing the chemicals, pollutants and waste products that make their way down the storm drains in the neighborhood or office park.

• Inspect the headwall, the weir, the exhaust and other key components of the retention pond on a regular basis to ensure the pond is operating as intended.

• Remove any silt or sediment that may have accumulated at the basin forebay on a regular basis.

• Inspect the storm water drains that are delivering water to the retention or detention pond and make sure they are free of debris and in good working order.

Items like grass clippings, pet waste and other various organic materials that find their way down the storm drains causes algae to grow at much faster rates in the pond and increases the maintenance needed to keep the pond in working order.

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