Delta Lake Unit No 1 Levee Reservoir Report
Last Updated: December 24, 2025
Delta Lake Unit No 1 Levee, located in Hidalgo County, Texas, was completed in 1936 and serves primarily for irrigation purposes.
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Summary
Managed by the local government, this earth dam stands at a height of 12 feet and has a storage capacity of 7,350 acre-feet. The dam spans a length of 23,975 feet and covers a surface area of 490 acres, supporting a drainage area of 0.8 square miles.
Designed by Morgan Engineering Co, this levee is regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes regular inspections to ensure its structural integrity. While the hazard potential is not available, the condition assessment is rated as fair. With a risk assessment of high, the dam poses a moderate level of risk, prompting the need for effective risk management measures to mitigate potential threats. Despite the absence of a spillway, the dam is equipped with six controlled outlet gates to manage water flow efficiently.
In the event of an emergency, the emergency action plan (EAP) status remains unknown, emphasizing the importance of preparedness and adherence to guidelines. With a risk management approach in place, Delta Lake Unit No 1 Levee stands as a critical infrastructure for water resource management in the region, highlighting the significance of sustainable water management practices in the face of changing climate conditions.
Year Completed |
1936 |
Dam Length |
23975 |
Dam Height |
12 |
River Or Stream |
OFF CH |
Primary Dam Type |
Earth |
Surface Area |
490 |
Hydraulic Height |
12 |
Drainage Area |
0.8 |
Nid Storage |
7350 |
Structural Height |
12 |
Outlet Gates |
Other Controlled - 6 |
Hazard Potential |
Not Available |
Foundations |
Soil |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Rio Grande Nr Brownsville
|
22cfs |
Rio Grande At Ft Ringgold
|
2110cfs |
Los Olmos Ck Nr Falfurrias
|
0cfs |
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.
Delta Lake Unit No 1 Levee