Diamond Pond Dam Reservoir Report
Nearby: Memorial Pond Dam Kendall Mill Dam
Last Updated: December 19, 2025
Diamond Pond Dam, located in Walpole, Massachusetts, is a privately owned earth dam that serves primarily for recreational purposes.
°F
°F
mph
Wind
%
Humidity
Summary
The dam, with a height of 10 feet and a hydraulic height of 7.8 feet, impounds Diamond Brook and a brook from Clarks Pond to create a surface area of 9.2 acres and a storage capacity of 55 acre-feet. Despite its fair condition assessment in 2013, the dam poses a significant hazard potential and is classified as having a moderate risk level.
Managed by the Department of Conservation and Recreation in Massachusetts, Diamond Pond Dam is regulated, permitted, inspected, and enforced by the state. Its uncontrolled spillway type and significant hazard potential highlight the importance of proper risk management and emergency preparedness measures. With a history of state jurisdiction and regulatory oversight, the dam plays a crucial role in maintaining water resources and enhancing recreational opportunities in the area.
For water resource and climate enthusiasts, Diamond Pond Dam presents a case study in the intersection of recreational infrastructure and environmental conservation. As a privately owned structure with a state-regulated status, the dam's management and maintenance offer valuable insights into balancing human activities with the preservation of natural ecosystems. With its moderate risk level and fair condition, ongoing monitoring and risk management measures are essential to ensure the safety and sustainability of Diamond Pond Dam for future generations.
Dam Length |
324 |
Dam Height |
10 |
River Or Stream |
DIAMOND BROOK; BROOK FROM CLARKS POND |
Primary Dam Type |
Earth |
Surface Area |
9.2 |
Hydraulic Height |
7.8 |
Drainage Area |
1.59 |
Nid Storage |
55 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
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.
YMCA Camp
Camp Christina Entrance
Missionary Point
Spang Camp Site
Ponkapoag Camp of Appalachian Mountain Club
"The Sandpits" Private Hiking and Winter Sports Area
Diamond Pond Dam
Beach Street Sharon