Road Dam Reservoir Report
Last Updated: December 5, 2025
Road Dam, located in Harding, South Dakota, is a privately owned structure regulated by the state's Department of Environment and Natural Resources (DENR).
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1948, this earth dam stands at a height of 20 feet and spans 520 feet in length, providing a maximum storage capacity of 88 acre-feet. Situated on the TR-Grand River, Road Dam has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment.
Despite lacking certain details such as surface area and drainage area, Road Dam is equipped with state-regulated permitting, inspection, and enforcement processes. The dam's primary purpose and associated structures remain unspecified, but its location within the Omaha District of the US Army Corps of Engineers signifies its significance in water resource management within the region. With a normal storage capacity of 70 acre-feet and a maximum discharge rate of 630 cubic feet per second, Road Dam plays a crucial role in flood control and water supply management in the area.
Road Dam may not have a designated emergency action plan or risk assessment in place, but its operational history and compliance with state regulations highlight its importance in ensuring water resource sustainability and climate resilience. As climate change impacts continue to pose challenges to water infrastructure, Road Dam stands as a key component in mitigating floods and ensuring water availability for the surrounding communities in South Dakota.
Year Completed |
1948 |
Dam Length |
520 |
Dam Height |
20 |
River Or Stream |
TR-GRAND RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
88 |
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.
Road Dam