Island Brook Lagoon Dam
Island Brook Lagoon Dam is an earth dam located in Fairfield County, Connecticut. It carries a High hazard potential classification and has a fair condition assessment.
About Island Brook Lagoon Dam
The primary purpose of Island Brook Lagoon Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Charcoal Pond Associates (private). It impounds the Island Brook.
The dam stands 19 feet tall and stretches 145 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 105 acre-feet, and collects water from a drainage area of 1 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. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 09/30/2008. That was 17 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.
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 | Island Brook |
| Coordinates | 41.21536, -73.20488 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 145 ft |
Storage & Hydraulics
| NID Storage | 105 acre-ft |
| Max Storage | 105 acre-ft |
| Normal Storage | 105 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 780 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Charcoal Pond Associates |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/30/2008 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00073 |
| Federal ID | CT00073 |
| More Info | State Dam Safety Program |