Roark Lake No 1 Dam Reservoir Report
Last Updated: December 5, 2025
Roark Lake No 1 Dam, located in McMullen, Texas, was completed in 1955 by the USDA NRCS with a primary purpose of serving as a Fish and Wildlife Pond.
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Summary
The earth dam stands at a height of 16 feet and spans a length of 1200 feet, with a storage capacity of 140 acre-feet. Situated on TR-San Miguel Creek, the dam is owned privately and is not regulated by the state. Despite its high hazard potential, the dam is currently not rated for its condition assessment.
This dam plays a crucial role in providing fire protection, stock, and recreation opportunities in the area. With a drainage area of 1250 acres, Roark Lake No 1 Dam serves as a vital water resource for the surrounding ecosystem. Although there are no spillways or locks associated with the structure, its presence enhances the local environment and supports various recreational activities.
Water resource and climate enthusiasts will appreciate the significance of Roark Lake No 1 Dam in supporting fish and wildlife populations in the region. As a privately owned structure, the dam stands as a testament to the collaborative efforts of the community in managing and conserving water resources for future generations. Its strategic location and functional design highlight the importance of sustainable water management practices in mitigating climate-related challenges in the area.
Year Completed |
1955 |
Dam Length |
1200 |
Dam Height |
16 |
River Or Stream |
TR-SAN MIGUEL CREEK |
Primary Dam Type |
Earth |
Drainage Area |
1250 |
Nid Storage |
140 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
San Miguel Ck Nr Tilden
|
0cfs |
Frio Rv At Tilden
|
0cfs |
Atascosa Rv At Whitsett
|
0cfs |
Nueces Rv Nr Tilden
|
0cfs |
Choke Canyon Res Owc Nr Three Rivers
|
33cfs |
Nueces Rv Nr Three Rivers
|
29cfs |
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.
Roark Lake No 1 Dam