Union Mill Pond
Union Mill Pond is an earth dam located in Providence County, Rhode Island, built in 1883. It carries a Significant hazard potential classification and has a poor condition assessment.
About Union Mill Pond
Union Mill Pond is a dam in Providence, Rhode Island. The dam is owned by Sayles Mills Associates (private). It impounds the Pascoag River near Burrillville.
The dam stands 7 feet tall and stretches 290 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 70 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1883, 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. An emergency action plan is in place for this dam.
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Location
| State | Rhode Island |
| County | Providence |
| Nearest City | Burrillville |
| River/Stream | Pascoag River |
| Coordinates | 41.95515, -71.70307 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 290 ft |
| Year Completed | 1883 (143 years old) |
Storage & Hydraulics
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Normal Storage | 45 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 9 sq mi |
| Max Discharge | 425 cfs |
Ownership & Safety
| Owner | SAYLES MILLS ASSOCIATES |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | RI04011 |
| Federal ID | RI04011 |
| More Info | State Dam Safety Program |