Light Lake No 4 Dam Reservoir Report
Last Updated: December 6, 2025
Light Lake No 4 Dam, located in Dimmit, Texas, was completed in 1974 and serves as a vital water supply source for the region.
°F
°F
mph
Wind
%
Humidity
Summary
This private-owned earth dam stands at a height of 15 feet and has a length of 1100 feet, with a storage capacity of 120 acre-feet. The dam is situated on the TR-San Roque Creek and is regulated by the state, with regular inspections conducted to ensure its safety and functionality.
Despite being a modest structure, Light Lake No 4 Dam poses a high risk due to its condition assessment being not rated and its hazard potential not available. The dam does not have a spillway and features none inlet gates, raising concerns about its ability to manage water discharge effectively. With no emergency action plan in place and limited risk management measures identified, the dam's risk assessment remains a priority for local water resource and climate enthusiasts.
The lack of detailed data on the dam's condition and emergency preparedness underscores the importance of ongoing monitoring and maintenance efforts. As climate change continues to impact water resources, the significance of ensuring the safety and resilience of structures like Light Lake No 4 Dam becomes increasingly paramount. Collaborative efforts between private owners, regulatory agencies, and the community will be essential in safeguarding this critical water supply infrastructure for the future.
Year Completed |
1974 |
Dam Length |
1100 |
Dam Height |
15 |
River Or Stream |
TR-SAN ROQUE CREEK |
Primary Dam Type |
Earth |
Surface Area |
13.5 |
Hydraulic Height |
15 |
Nid Storage |
120 |
Structural Height |
15 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nueces Rv Nr Asherton
|
0cfs |
Nueces Rv At Cotulla
|
0cfs |
Frio Rv Nr Derby
|
0cfs |
San Casimiro Ck Nr Freer
|
0cfs |
Zacate Ck At Laredo
|
0cfs |
Nueces Rv Nr Tilden
|
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.
Light Lake No 4 Dam