Tmpa Gibbons Creek Mine Dam Dp 1 Reservoir Report
Last Updated: December 5, 2025
Tmpa Gibbons Creek Mine Dam Dp 1 in Navasota, Texas, is a vital water resource managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ).
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Summary
The dam, completed in 1987, stands at a height of 35 feet and spans 2700 feet across Rock Lake Creek, with a storage capacity of 2170 acre-feet. The dam serves various purposes, including flood control and water supply, with a spillway width of 100 feet for uncontrolled overflow.
Despite being classified as having a moderate risk level, the condition of the dam is not rated, and its hazard potential is not available. The last inspection was conducted in January 2001, and the presence of uncontrolled outlet gates raises concerns about potential maintenance needs. With a drainage area of 3.54 square miles, the dam plays a critical role in managing water flow in the region and requires regular monitoring and oversight to ensure its continued safety and functionality for water resource and climate enthusiasts.
Overall, Tmpa Gibbons Creek Mine Dam Dp 1 is an essential infrastructure for water management in Grimes County, Texas, with its primary purpose being to support various water-related activities. With the involvement of Morrison Knudson in its design and the oversight of TCEQ for regulatory compliance, the dam contributes to the local ecosystem's sustainability. Continued vigilance and maintenance efforts are necessary to uphold the dam's integrity and protect downstream communities from potential risks associated with its operation.
Year Completed |
1987 |
Dam Length |
2700 |
Dam Height |
35 |
River Or Stream |
ROCK LAKE CREEK |
Primary Dam Type |
Earth |
Surface Area |
188 |
Drainage Area |
3.54 |
Nid Storage |
2170 |
Structural Height |
30 |
Outlet Gates |
Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
35 |
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.
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