Slatersville Reservoir Upper
Key Takeaway
Slatersville Reservoir Upper is classified as high hazard in Rhode Island. It was completed in 1886 and is 140 years old. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 27 ft (taller than 91.4% in RI) |
| Dam Length | 256 ft |
| Dam Type | Masonry |
| Max Storage | 3.6K acre-ft |
| Normal Storage | 2.0K acre-ft |
| Surface Area | 147 acres |
| Drainage Area | 89 sq mi |
| Max Discharge | 12,118 cfs |
| Year Completed | 1886 (140 years old) |
| NID ID | RI02501 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
DUDLEY DEVELOPMENT CORP.
Private
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Low Hazard 12 ftFrequently Asked Questions
What is the hazard classification of Slatersville Reservoir Upper?
Slatersville Reservoir Upper is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Slatersville Reservoir Upper?
Slatersville Reservoir Upper is owned by DUDLEY DEVELOPMENT CORP. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Slatersville Reservoir Upper built?
Slatersville Reservoir Upper was completed in 1886, making it 140 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
How tall is Slatersville Reservoir Upper?
Slatersville Reservoir Upper has a dam height of 27 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Slatersville Reservoir Upper last inspected?
Slatersville Reservoir Upper was last inspected on November 12, 2009. Inspection dates indicate when a formal review occurred, not the results of that inspection.