Greystone is a rockfill dam located in Providence County, Rhode Island, built in 1865. It carries a Low hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 355 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic rockfill embankment section and the water level is illustrative.
About Greystone
Greystone is a dam in Providence, Rhode Island. The dam is owned by Worcester Company (private). It impounds the Woonasquatucket River near North Providence/johnston.
The dam stands 10 feet tall and stretches 355 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 116 acre-feet, and collects water from a drainage area of 39 square miles. Completed in 1865, the structure is one of the older dams in the region, with over a century and a half of service.
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 | Providence |
| Nearest City | North Providence/johnston |
| River/Stream | Woonasquatucket River |
| Coordinates | 41.86607, -71.49243 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 10 ft |
| Dam Height | 7 ft |
| Dam Length | 355 ft |
| Year Completed | 1865 (161 years old) |
Storage & Hydraulics
| NID Storage | 116 acre-ft |
| Max Storage | 116 acre-ft |
| Normal Storage | 81 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 39 sq mi |
| Max Discharge | 1,039 cfs |
Ownership & Safety
| Owner | Worcester Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Emergency Action Plan | No |
Identifiers
| NID ID | RI01604 |
| Federal ID | RI01604 |
| More Info | State Dam Safety Program |