Jamestown Reservoir Reservoir Report
Last Updated: December 25, 2025
Jamestown Reservoir, also known as Carr's Pond, is a picturesque water supply reservoir located in Jamestown, Rhode Island.
°F
°F
mph
Wind
%
Humidity
Summary
Completed in 1940, this rockfill dam stands at a height of 10 feet and has a storage capacity of 195 acre-feet, providing essential water resources to the local community. The reservoir covers a surface area of 26 acres and is fed by Jamestown Brook, serving as a vital source of water for Newport County.
Managed by the local government, Jamestown Reservoir is regulated by the State of Rhode Island, with state permitting, inspection, and enforcement in place to ensure its safety and functionality. The dam is classified as having a significant hazard potential, but its condition is assessed as satisfactory, indicating a well-maintained structure that meets safety standards. With a spillway width of 21 feet and a maximum discharge of 85 cubic feet per second, the reservoir is equipped to handle potential flood events and protect surrounding areas from water damage.
For water resource and climate enthusiasts, Jamestown Reservoir offers a fascinating example of infrastructure designed for water supply purposes in a coastal region. Its historical significance, combined with its modern regulatory oversight and functional design, makes it a valuable asset for the community and a noteworthy site for those interested in water management and conservation efforts in Rhode Island.
Year Completed |
1940 |
Dam Length |
916 |
Dam Height |
9 |
River Or Stream |
JAMESTOWN BROOK |
Primary Dam Type |
Rockfill |
Surface Area |
26 |
Hydraulic Height |
7 |
Drainage Area |
1 |
Nid Storage |
195 |
Structural Height |
10 |
Hazard Potential |
Significant |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Jamestown Reservoir
Jamestown