Cressy Number 1 Reservoir Report
Nearby: Cressy Number 2 Whisler Number 1
Last Updated: December 8, 2025
Cressy Number 1 is a privately owned earth dam located in South Dakota, specifically in Jones County.
°F
°F
mph
Wind
%
Humidity
Summary
Completed in 1952, this dam has a height of 21 feet and a length of 612 feet, with a storage capacity of 81 acre-feet. It is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and is subject to state inspection, permitting, and enforcement.
Situated on the TR-Bad River, Cressy Number 1 serves as a vital resource for water storage and management in the region, with a maximum discharge capacity of 1512 cubic feet per second. Despite its low hazard potential, the dam's condition is currently rated as "Not Rated," indicating a need for further assessment and potential maintenance. While the dam does not have an Emergency Action Plan (EAP) in place, it meets state regulatory guidelines and is operated by the Natural Resources Conservation Service.
For water resource and climate enthusiasts, Cressy Number 1 presents an interesting case study in private dam ownership and management. As a key infrastructure element in the local water system, this dam plays a crucial role in flood control and water supply for the surrounding area. With its historical significance and ongoing regulatory oversight, Cressy Number 1 highlights the importance of proactive dam maintenance and risk management to ensure the safety and sustainability of water resources in South Dakota.
Year Completed |
1952 |
Dam Length |
612 |
Dam Height |
21 |
River Or Stream |
TR-BAD RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
81 |
Hazard Potential |
Low |
Nid Height |
21 |
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.
Cressy Number 1