Ashton Reservoir Report
Nearby: Albion Limerock Reservoir
Last Updated: December 13, 2025
Ashton is a private masonry dam located in Cumberland, Rhode Island, along the Blackstone River.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1885, this historic structure stands at 20 feet tall and spans 318 feet in length, with a storage capacity of 200 acre-feet. Despite its age, Ashton has a low hazard potential but is currently in poor condition as of the last assessment in October 2017.
With a normal storage capacity of 112 acre-feet and a drainage area of 421 square miles, Ashton plays a crucial role in managing water resources in the area. The dam has a maximum discharge capacity of 19,800 cubic feet per second and a spillway width of 250 feet. Although it is not regulated by the state, Ashton undergoes regular inspections to ensure its structural integrity and safety measures are up to standard.
For water resource and climate enthusiasts, Ashton provides a fascinating glimpse into the history and infrastructure of water management in Rhode Island. As efforts continue to maintain and improve the dam's condition, its role in protecting against flooding and supporting water supply needs in the region remains vital.
Year Completed |
1885 |
Dam Length |
318 |
Dam Height |
18 |
River Or Stream |
BLACKSTONE RIVER |
Primary Dam Type |
Masonry |
Surface Area |
35 |
Hydraulic Height |
10 |
Drainage Area |
421 |
Nid Storage |
200 |
Structural Height |
20 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Ashton
Olney Pond