Grogens Lake Dam Reservoir Report
Last Updated: December 5, 2025
Grogens Lake Dam, located in Lamar, Texas, was completed in 1980 and stands at 33 feet in height.
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Summary
This earth dam, with a buttress core type, serves a primary purpose other than flood control. It has a storage capacity of 238 acre-feet and a normal storage level of 139 acre-feet. The dam is situated on the TR-Morrison Creek, within the jurisdiction of the Tulsa District of the US Army Corps of Engineers.
Despite being privately owned, Grogens Lake Dam is subject to state permitting and inspection requirements. It does not have a spillway and is equipped with one outlet gate. The dam is classified as having a high risk level (2) based on a risk assessment, although its specific hazard potential and condition assessment are not available. With no associated structures and a lack of regulatory oversight from federal agencies, the management and maintenance of Grogens Lake Dam fall solely on its private owner.
For water resource and climate enthusiasts, Grogens Lake Dam presents an interesting case study in dam infrastructure and risk management. The lack of detailed information on its hazard potential and condition assessment raises questions about its safety and the effectiveness of its emergency action plans. As a privately owned structure, the responsibility for ensuring the dam's integrity and compliance with state regulations lies with its owner, highlighting the importance of proactive monitoring and maintenance practices in safeguarding water resources and communities downstream.
Year Completed |
1980 |
Dam Length |
2100 |
Dam Height |
33 |
River Or Stream |
TR-MORRISON CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
33 |
Nid Storage |
238 |
Structural Height |
33 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
33 |
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.
Grogens Lake Dam