Riga Lake Dam
Riga Lake Dam is an earth dam located in Litchfield County, Connecticut, built in 1900. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Riga Lake Dam
The primary purpose of Riga Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Mount Riga, Inc. (private). It impounds the Monument Brook near Salisbury.
The dam stands 10 feet tall and stretches 200 feet across, creates a reservoir covering 153 acres, has a maximum storage capacity of 765 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1900, 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 06/01/2020.
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Location
| State | Connecticut |
| County | Litchfield |
| Nearest City | Salisbury |
| River/Stream | Monument Brook |
| Coordinates | 42.01795, -73.47774 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 200 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 765 acre-ft |
| Max Storage | 765 acre-ft |
| Normal Storage | 765 acre-ft |
| Surface Area | 153 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 403 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Mount Riga, Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/01/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CT00594 |
| Federal ID | CT00594 |
| More Info | State Dam Safety Program |