Great Pond Dam
Great Pond Dam is an earth dam located in Fairfield County, Connecticut. It carries a High hazard potential classification and has a fair condition assessment.
About Great Pond Dam
Great Pond Dam is a dam in Fairfield, Connecticut. The dam is owned by Town Of Ridgefield (local government). It impounds the Norwalk River Trib.
The dam stands 20 feet tall and stretches 150 feet across, creates a reservoir covering 21 acres, has a maximum storage capacity of 221 acre-feet, and collects water from a drainage area of 0 square miles.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 10/23/2024.
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 Connecticut 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 | Connecticut |
| County | Fairfield |
| River/Stream | Norwalk River Trib |
| Coordinates | 41.31495, -73.46853 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 150 ft |
Storage & Hydraulics
| NID Storage | 221 acre-ft |
| Max Storage | 221 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 21 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Town of Ridgefield |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 10/23/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT50020 |
| Federal ID | CT50020 |
| More Info | State Dam Safety Program |