Grimes Lake Dam Reservoir Report
Nearby: Hugnes Gss Cheney Dam
Last Updated: December 5, 2025
Grimes Lake Dam, located in Leon, Texas, was completed in 1971 by the USDA NRCS and serves as a recreational spot for water resource and climate enthusiasts.
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Summary
Standing at a height of 23 feet with a structural height of 29 feet, the dam spans 660 feet and holds a maximum storage capacity of 372 acre-feet. With a normal storage capacity of 230 acre-feet, the dam covers a surface area of 19 acres and is associated with the Tomlin Branch.
Despite its recreational purpose, Grimes Lake Dam has a high risk assessment rating of 2, indicating potential hazards. The dam does not have a spillway and features no locks, but is equipped with one outlet gate. While it is not state-regulated, the dam undergoes state inspection and permitting processes. Although its risk management measures and emergency action plans are not detailed, the dam remains a focal point for water-related activities in the area.
Year Completed |
1971 |
Dam Length |
660 |
Dam Height |
23 |
River Or Stream |
TOMLIN BRANCH |
Primary Dam Type |
Earth |
Surface Area |
19 |
Hydraulic Height |
23 |
Nid Storage |
372 |
Structural Height |
29 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
29 |
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.
Grimes Lake Dam