El Negro Ranch Lake Dam Reservoir Report
Last Updated: December 5, 2025
The El Negro Ranch Lake Dam in Wilson County, Texas, was completed in 1961 and serves multiple purposes including fire protection, stock watering, and recreational activities.
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Summary
This private earth dam stands at a height of 35 feet and has a length of 950 feet, creating a reservoir with a capacity of 392 acre-feet. Located on TR-Shockley Creek, the dam does not have a spillway and is classified as a high-risk structure with a hazard potential rating of 2.
Despite being a privately owned structure, the El Negro Ranch Lake Dam is regulated by the state of Texas with permitting and inspection requirements. The dam is primarily designed for fire protection and irrigation purposes, providing essential water resources for the surrounding area. With no federal agency involvement in its ownership or funding, the dam remains under the jurisdiction of the state and is subject to state regulatory oversight.
For water resource and climate enthusiasts, the El Negro Ranch Lake Dam represents a significant infrastructure for water management in the region. With its strategic location on Shockley Creek and its important role in serving the community's water needs, this dam plays a crucial role in sustaining agricultural activities, wildlife habitats, and recreational opportunities in the area. The dam's risk assessment and management measures are essential considerations for ensuring the safety and reliability of this vital water resource.
Year Completed |
1961 |
Dam Length |
950 |
Dam Height |
35 |
River Or Stream |
TR-SHOCKLEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
35 |
Nid Storage |
392 |
Structural Height |
35 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cibolo Ck Nr Falls City
|
33cfs |
Cibolo Ck At Sutherland Springs
|
20cfs |
Ecleto Ck Nr Runge
|
0cfs |
Sandies Ck Nr Westhoff
|
0cfs |
San Antonio Rv Nr Falls City
|
151cfs |
San Antonio Rv At Sh 72 Nr Runge
|
189cfs |
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.
El Negro Ranch Lake Dam