Diamond Hill Reservoir
Key Takeaway
Diamond Hill Reservoir is classified as high hazard in Rhode Island. It was completed in 1971 and is 55 years old. Its primary use is water supply. 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 | 76 ft (taller than 99.1% in RI) |
| Dam Length | 2,000 ft |
| Dam Type | Earth |
| Max Storage | 15.7K acre-ft |
| Normal Storage | 11.0K acre-ft |
| Surface Area | 390 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 3,100 cfs |
| Year Completed | 1971 (55 years old) |
| NID ID | RI00802 |
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
PAWTUCKET WATER SUPPLY BOARD
Local Government
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Low Hazard 20 ftFrequently Asked Questions
What is the hazard classification of Diamond Hill Reservoir?
Diamond Hill Reservoir 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 Diamond Hill Reservoir?
Diamond Hill Reservoir is owned by PAWTUCKET WATER SUPPLY BOARD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Diamond Hill Reservoir built?
Diamond Hill Reservoir was completed in 1971, making it 55 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Diamond Hill Reservoir?
Diamond Hill Reservoir serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Diamond Hill Reservoir?
Diamond Hill Reservoir has a dam height of 76 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 Diamond Hill Reservoir last inspected?
Diamond Hill Reservoir was last inspected on August 20, 2014. Inspection dates indicate when a formal review occurred, not the results of that inspection.