Aldon Mill Pond Dam is a masonry 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 · 25 ft25 ft tall and 95 ft long, taller than 50% of U.S. dams with a recorded height. 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 Aldon Mill Pond Dam
The primary purpose of Aldon Mill 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 Tankerhoosen River near Talcotville.
The dam stands 25 feet tall and stretches 95 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 87 acre-feet, and collects water from a drainage area of 12 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. An emergency action plan is in place for this dam. The most recent inspection on record was 10/15/2021.
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Location
| State | Connecticut |
| County | Tolland |
| Nearest City | Talcotville |
| River/Stream | Tankerhoosen River |
| Coordinates | 41.82190, -72.49845 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 95 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 87 acre-ft |
| Max Storage | 87 acre-ft |
| Normal Storage | 37 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 2,435 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Connecticut Deep |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/15/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00622 |
| Federal ID | CT00622 |
| More Info | State Dam Safety Program |