Wallum Lake is a masonry dam located in Providence County, Rhode Island, built in 1866. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 10 ft10 ft tall and 80 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Wallum Lake
The primary purpose of Wallum Lake is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Ri Hillcroft, Inc. (local government). It impounds the Clear River near Burrillville.
The dam stands 10 feet tall and stretches 80 feet across, creates a reservoir covering 322 acres, has a maximum storage capacity of 10,000 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1866, the structure is one of the older dams in the region, with over a century and a half of service.
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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. 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 | Clear River |
| Coordinates | 42.00071, -71.76204 |
Physical Characteristics
| Dam Type | Masonry |
| NID Height | 10 ft |
| Dam Height | 7 ft |
| Dam Length | 80 ft |
| Year Completed | 1866 (160 years old) |
Storage & Hydraulics
| NID Storage | 10,000 acre-ft |
| Max Storage | 10,000 acre-ft |
| Normal Storage | 9,000 acre-ft |
| Surface Area | 322 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 80 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Ri Hillcroft, Inc. |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | RI00301 |
| Federal ID | RI00301 |
| More Info | State Dam Safety Program |