Alton Pond is a dam located in Washington County, Rhode Island, built in 1920. It carries a Significant hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 550 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Alton Pond
Alton Pond is a dam in Washington, Rhode Island. It impounds the Wood River near Richmond.
The dam stands 19 feet tall and stretches 550 feet across, creates a reservoir covering 53 acres, has a maximum storage capacity of 424 acre-feet, and collects water from a drainage area of 87 square miles. Completed in 1920, 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. An emergency action plan is in place for this dam.
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Location
| State | Rhode Island |
| County | Washington |
| Nearest City | Richmond |
| River/Stream | Wood River |
| Coordinates | 41.43777, -71.72150 |
Physical Characteristics
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 550 ft |
| Year Completed | 1920 (106 years old) |
Storage & Hydraulics
| NID Storage | 424 acre-ft |
| Max Storage | 424 acre-ft |
| Normal Storage | 318 acre-ft |
| Surface Area | 53 acres |
| Drainage Area | 87 sq mi |
| Max Discharge | 5,630 cfs |
Ownership & Safety
| Purpose | Other |
| Owner Type | Not Listed |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | RI01407 |
| Federal ID | RI01407 |
| More Info | State Dam Safety Program |