Long Pond is a gravity dam located in Washington County, Rhode Island, built in 1885. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 230 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 Long Pond
Long Pond is a dam in Washington, Rhode Island. The dam is owned by Ri Dem (state). It impounds the Blue Pond Brook near Hopkinton.
The dam stands 10 feet tall and stretches 230 feet across, creates a reservoir covering 22 acres, has a maximum storage capacity of 79 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1885, the structure is over a century old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks.
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Location
| State | Rhode Island |
| County | Washington |
| Nearest City | Hopkinton |
| River/Stream | Blue Pond Brook |
| Coordinates | 41.50666, -71.76535 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 10 ft |
| Dam Height | 9 ft |
| Dam Length | 230 ft |
| Year Completed | 1885 (141 years old) |
Storage & Hydraulics
| NID Storage | 79 acre-ft |
| Max Storage | 79 acre-ft |
| Normal Storage | 62 acre-ft |
| Surface Area | 22 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 73 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Ri Dem |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Emergency Action Plan | No |
Identifiers
| NID ID | RI01410 |
| Federal ID | RI01410 |
| More Info | State Dam Safety Program |