Connally Lake No 1 Dam Reservoir Report
Last Updated: December 20, 2025
Located in Wilson County, Texas, Connally Lake No 1 Dam stands as a testament to engineering prowess and resource management.
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Summary
Built in 1970, this earth dam with a buttress core stands at 25 feet tall and stretches for 1100 feet, holding a maximum storage capacity of 850 acre-feet. The dam is situated on the TR-Picosa Creek, with the Galveston District overseeing its regulation and inspection.
Despite its age, Connally Lake No 1 Dam remains in good condition, with a hazard potential of 'Not Available' and a high risk assessment rating of 2. While no spillway is present, the dam is equipped with one outlet gate. Although the dam's purpose is listed as 'Other', it serves the community by providing water storage for various needs. The State of Texas, through the Texas Commission on Environmental Quality, regulates and inspects the dam to ensure its continued safety and functionality.
For water resource and climate enthusiasts, Connally Lake No 1 Dam serves as a fascinating example of man-made infrastructure supporting environmental conservation and community development. With its strategic location and efficient design, the dam plays a crucial role in managing water resources in the area. As climate change continues to impact water availability and quality, structures like Connally Lake No 1 Dam become increasingly important for safeguarding our natural resources and ensuring sustainable development for future generations.
Year Completed |
1970 |
Dam Length |
1100 |
Dam Height |
25 |
River Or Stream |
TR-PICOSA CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
850 |
Structural Height |
25 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
25 |
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.
Connally Lake No 1 Dam