Jamestown Lower Reservoir
Jamestown Lower Reservoir is an earth dam located in Newport County, Rhode Island. It carries a Significant hazard potential classification and has a poor condition assessment.
About Jamestown Lower Reservoir
The primary purpose of Jamestown Lower Reservoir is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Jamestown, Town Of (local government). It impounds the Jamestown Brook near Jamestown.
The dam stands 12 feet tall and stretches 400 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 24 acre-feet, and collects water from a drainage area of 2 square miles.
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 | Newport |
| Nearest City | Jamestown |
| River/Stream | Jamestown Brook |
| Coordinates | 41.51107, -71.38167 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 400 ft |
Storage & Hydraulics
| NID Storage | 24 acre-ft |
| Max Storage | 24 acre-ft |
| Normal Storage | 18 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 225 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | JAMESTOWN, TOWN OF |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | RI04214 |
| Federal ID | RI04214 |
| More Info | State Dam Safety Program |