Mcdonough Ash Pond # 4 Dam
Mcdonough Ash Pond # 4 Dam is an earth dam located in Cobb County, Georgia, built in 1974. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Mcdonough Ash Pond # 4 Dam
Mcdonough Ash Pond # 4 Dam is a dam in Cobb, Georgia. The dam is owned by Southern Company Services (private). It impounds the Unknown near Smyrna.
The dam stands 75 feet tall and stretches 4,440 feet across, creates a reservoir covering 50 acres, and has a maximum storage capacity of 1,800 acre-feet. Completed in 1974, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 02/02/2016. That was 10 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.
At 75 feet, this dam is taller than 97% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Georgia dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Georgia |
| County | Cobb |
| Nearest City | Smyrna |
| River/Stream | Unknown |
| Coordinates | 33.82808, -84.47288 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 75 ft |
| Dam Height | 75 ft |
| Dam Length | 4,440 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 1,800 acre-ft |
| Max Storage | 1,800 acre-ft |
| Normal Storage | 1,450 acre-ft |
| Surface Area | 50 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | Southern Company Services |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/02/2016 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | GA01482 |
| Federal ID | GA01482 |
| More Info | State Dam Safety Program |