Johnstone Pond Dam is an earth dam located in Windham County, Connecticut. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 12 ft12 ft tall and 200 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Johnstone Pond Dam
The primary purpose of Johnstone Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Raymond W. & Donna M. Auger (private). It impounds the Muddy Brook.
The dam stands 12 feet tall and stretches 200 feet across, creates a reservoir covering 9 acres, and collects water from a drainage area of 1 square miles.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 12/09/2020.
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Location
| State | Connecticut |
| County | Windham |
| River/Stream | Muddy Brook |
| Coordinates | 41.96957, -71.95359 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 200 ft |
Storage & Hydraulics
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Raymond W. & Donna M. Auger |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/09/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT01490 |
| Federal ID | CT01490 |
| More Info | State Dam Safety Program |