Upper Pond Dam
Upper Pond Dam is an earth dam located in New London County, Connecticut, built in 1860. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Upper Pond Dam
The primary purpose of Upper Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Reneson (private). It impounds the Joshua Creek near Lyme.
The dam stands 12 feet tall and stretches 140 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1860, the structure is one of the older dams in the region, with over a century and a half of service.
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 08/29/2018.
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Location
| State | Connecticut |
| County | New London |
| Nearest City | Lyme |
| River/Stream | Joshua Creek |
| Coordinates | 41.39645, -72.37725 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 140 ft |
| Year Completed | 1860 (166 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 54 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 145 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Reneson |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/29/2018 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00421 |
| Federal ID | CT00421 |
| More Info | State Dam Safety Program |