Storm Water

Storm Water Management
Storm Water Management is the controlling of storm water through a variety of control structures. Drainage facilities are studied and constructed based upon hydraulic studies, all to minimize flooding and erosion.  Detention facilities and retainage ponds are created near development to capture storm that has entered the underground drainage conveyance system. These ponds store the water for 24 to 48 hours and release same to minimize or eliminate flooding. Release of waters from these man made ponds can be regulated over a set time period, depending upon topography, development and rainfall totals for a particular region of drainage basin.   

Some general questions concerning stormwater control;

Q: Is it normal to have running water across my lawn in a storm?
A: Yes. Many homes have storm water “swales” in their lawns and yards. In dry conditions these swales may not be noticed but as it rains, storm water will flow through these small channels. These swales carry water runoff from driveways, rooftops and other upstream properties to the street. Gutters then carry the water to underground drainage systems that fill the detention facilities for a temporary 24-48 hour storage duration.

Q: Why would you want to store storm water?
A: Storing storm water controls down stream flooding. However, detention facilities do not totally stop creeks from filling with water, but do help control the amount and timing of storm water that a stream will receive during heavy events. A stream will still flow at full bank in a heavy rainfall; however, the same stream without a detention facility would crest its banks and could flood nearby structures and properties.

Q: What can you pour into the storm drains in the streets?
A: Nothing! If it is not storm water, it doesn't belong in a storm drain! Every time you wash your car you are dumping soap into the stream, as well as chlorine from the water tap. Any oil that has leaked out onto your driveway finds its way to the storm drain as well. Even fertilizers applied to your lawn can affect the ecology of the local streams. If possible minimize these pollutants, it will help to keep creeks and lake clean. 

If you are experiencing a stormwater issue or witness an illicit discharge into any storm drain, call the Public Works Department at 770 975-0679 or email  rbeard@acworth.org.

For additional information on Storm Water Runoff please visit:

For additional resources about Soil Erosion please visit: