Bishop Swamp Dam Reservoir Report
Nearby: Hihoti Dam Fuller Pond Dam
Last Updated: March 14, 2026
Bishop Swamp Dam, located in Andover, Connecticut, is a state-regulated structure with a primary purpose of recreation.
Summary
The dam has a height of 9.4 feet and a length of 194 feet, providing a storage capacity of 600 acre-feet. The dam is situated on the Saddle Brook river and serves as a significant hazard potential with a moderate risk assessment.
Although the dam's condition assessment is labeled as "Not Rated," it undergoes inspections every 7 years, with the last one being conducted in June 2008. The spillway type is uncontrolled, and the dam is associated with the US Army Corps of Engineers' New England District. With its picturesque location and recreational purpose, Bishop Swamp Dam stands as a vital water resource and climate element in the Tolland County area, contributing to the region's environmental landscape and water management strategies.
°F
°F
mph
Wind
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Humidity
15-Day Weather Outlook
Dam Length |
194 |
Dam Height |
9.4 |
River Or Stream |
SADDLE BROOK |
Surface Area |
182 |
Drainage Area |
2.3 |
Nid Storage |
600 |
Hazard Potential |
Significant |
Nid Height |
9 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Willimantic River Near Coventry
|
873cfs |
Natchaug River At Willimantic
|
1790cfs |
Shetucket River Near Willimantic
|
3280cfs |
Hockanum River Near East Hartford
|
218cfs |
Salmon River Near East Hampton
|
433cfs |
Mount Hope River Near Warrenville
|
150cfs |
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.
Bishop Swamp Dam
Holbrook Pond