Relvea Gss No 1 Reservoir Report
Last Updated: December 5, 2025
Relvea Gss No 1 is a privately owned Earth dam situated in Johnson, Texas, designed by the USDA NRCS and completed in 1981.
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Summary
The dam stands at a height of 29 feet and spans a length of 420 feet, providing a storage capacity of 48 acre-feet primarily for fire protection, stock, and small fish pond purposes. Located on the TR-Cottonwood Creek, this structure serves as a crucial resource for water management and conservation in the area.
Despite its significant role in water storage, the dam lacks certain safety features such as a spillway and has not been rated for its condition assessment. With a high hazard potential and a risk assessment rating of 2, there is a need for enhanced risk management measures and emergency preparedness. The structure's location in a high-risk zone underscores the importance of regular inspections and maintenance to ensure the safety of surrounding communities and the environment.
As water resource and climate enthusiasts, understanding the critical role of infrastructure like Relvea Gss No 1 in water management is essential. By advocating for proper maintenance, risk assessment, and emergency response planning, we can work towards safeguarding our water resources and mitigating potential hazards associated with dams like Relvea Gss No 1. Collaborative efforts between stakeholders, regulatory agencies, and the community are vital in ensuring the sustainable use of water resources for future generations.
Year Completed |
1981 |
Dam Length |
420 |
Dam Height |
29 |
River Or Stream |
TR-COTTONWOOD CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Nid Storage |
48 |
Structural Height |
29 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Mountain Ck Nr Venus
|
1cfs |
Waxahachie Ck At Waxahachie
|
7cfs |
Walnut Ck Nr Mansfield
|
0cfs |
Village Ck At Everman
|
6cfs |
Nolan Rv At Blum
|
7cfs |
Richland Ck At Hwy 22 Nr Mertens
|
338cfs |
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.
Relvea Gss No 1