Terry Jordan Lake Dam Reservoir Report
Last Updated: December 8, 2025
Terry Jordan Lake Dam, located in Gasconade, Missouri, was completed in 1991 with a primary purpose of recreation.
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Summary
This private-owned Earth dam stands at a height of 33 feet and has a storage capacity of 198 acre-feet, with a normal storage level of 165 acre-feet. The dam is situated on the TRIB S. BRANCH PIN OAK CREEK and is under the jurisdiction of the St. Louis District.
Despite being classified as significant in terms of hazard potential, the condition assessment of Terry Jordan Lake Dam is marked as "Not Rated". The last inspection took place in June 1997, and the dam has not been regulated, permitted, or inspected by the state. The dam does not have an Emergency Action Plan (EAP) in place, and there is limited information available on its risk assessment and management measures.
For water resource and climate enthusiasts, Terry Jordan Lake Dam offers a fascinating case study in the management and maintenance of private-owned dams. With its recreational primary purpose and significant hazard potential, this Earth dam in Missouri presents challenges and opportunities for ensuring its safety and resilience in the face of changing climate conditions. Further research and monitoring may be necessary to fully understand the risks and implications associated with this dam.
Year Completed |
1991 |
Dam Height |
33 |
River Or Stream |
TRIB S. BRANCH PIN OAK CREEK |
Primary Dam Type |
Earth |
Surface Area |
15 |
Nid Storage |
198 |
Structural Height |
33 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
33 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Gasconade River Near Rich Fountain
|
960cfs |
Missouri River At Hermann
|
31200cfs |
Bourbeuse River Near High Gate
|
1cfs |
Maries River At Westphalia
|
16cfs |
Bourbeuse River At Union
|
110cfs |
Moreau River Near Jefferson City
|
61cfs |
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.
Terry Jordan Lake Dam