Holbrook Pond Dam is a concrete dam located in Tolland County, Connecticut, built in 1920. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 9 ft9 ft tall and 350 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Holbrook Pond Dam
The primary purpose of Holbrook Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Connecticut Deep (state). It impounds the Jeremy River Trib near Hebron.
The dam stands 9 feet tall and stretches 350 feet across, creates a reservoir covering 72 acres, has a maximum storage capacity of 348 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1920, the structure is over a century old.
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 11/09/2021.
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Location
| State | Connecticut |
| County | Tolland |
| Nearest City | Hebron |
| River/Stream | Jeremy River Trib |
| Coordinates | 41.67344, -72.37436 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 350 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 348 acre-ft |
| Max Storage | 348 acre-ft |
| Normal Storage | 348 acre-ft |
| Surface Area | 72 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 890 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Connecticut Deep |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/09/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00545 |
| Federal ID | CT00545 |
| More Info | State Dam Safety Program |