Tmpa Gibbons Creek Mine Dam Sp-64 Reservoir Report
Nearby: Smith Lake Dam Farm Lake Dam
Last Updated: December 5, 2025
Tmpa Gibbons Creek Mine Dam Sp-64 in Grimes, Texas, is a locally owned earth dam designed by TMPA for tailings storage, completed in 1995.
°F
°F
mph
Wind
%
Humidity
Summary
The dam stands at a height of 20.5 feet with a length of 1200 feet, creating a storage capacity of 68 acre-feet. It is regulated by the Texas Commission on Environmental Quality and is inspected and enforced by the state. Despite not having a spillway, the dam is considered to have a high risk potential.
Situated on TR-Sulphur Creek and within the Galveston District, the dam serves its primary purpose of tailings storage with a normal storage level of 6 feet. With a risk assessment rating of 2 (high), there is a need for stringent risk management measures to be implemented. The dam's condition is currently not rated, and there is no available emergency action plan in place. The surrounding area has a surface area of 11 acres with limited drainage area, making it crucial for the dam's structural integrity to be maintained to prevent any potential hazards.
As water resource and climate enthusiasts monitor the Tmpa Gibbons Creek Mine Dam Sp-64, its operational status and risk management practices will be crucial in ensuring the safety of the surrounding community and environment. With its location in Texas and under state jurisdiction, the dam's design, construction, and maintenance are vital aspects to consider in safeguarding against any potential risks or emergencies that may arise. It highlights the importance of proper regulation, inspection, and enforcement to mitigate any potential threats to water resources and climate sustainability in the region.
Year Completed |
1995 |
Dam Length |
1200 |
Dam Height |
20.5 |
River Or Stream |
TR-SULPHUR CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Drainage Area |
0.08 |
Nid Storage |
68 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
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.
Tmpa Gibbons Creek Mine Dam Sp-64