Stillwater Pond is a gravity dam located in Providence County, Rhode Island, built in 1885. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 18 ft18 ft tall and 745 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 Stillwater Pond
Stillwater Pond is a dam in Providence, Rhode Island. The dam is owned by Breakwater Preservation Conservancy (private). It impounds the Woonasquatucket River near Smithfield.
The dam stands 18 feet tall and stretches 745 feet across, creates a reservoir covering 28 acres, has a maximum storage capacity of 170 acre-feet, and collects water from a drainage area of 30 square miles. Completed in 1885, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks.
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Location
| State | Rhode Island |
| County | Providence |
| Nearest City | Smithfield |
| River/Stream | Woonasquatucket River |
| Coordinates | 41.90791, -71.52516 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 745 ft |
| Year Completed | 1885 (141 years old) |
Storage & Hydraulics
| NID Storage | 170 acre-ft |
| Max Storage | 170 acre-ft |
| Normal Storage | 125 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 30 sq mi |
| Max Discharge | 627 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Breakwater Preservation Conservancy |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Emergency Action Plan | No |
Identifiers
| NID ID | RI03102 |
| Federal ID | RI03102 |
| More Info | State Dam Safety Program |