Attoyac Dam Reservoir Report
Last Updated: December 5, 2025
Attoyac Dam, located in Shelby, Texas, was completed in 1905 and stands at a height of 9 feet.
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Summary
This Earth dam, primarily used for recreation purposes, spans 2000 feet along the Attoyac River. With a normal storage capacity of 65 acre-feet and a maximum storage of 125 acre-feet, the dam offers a tranquil setting for water resource and climate enthusiasts to enjoy various recreational activities.
While the dam does not have a spillway, it is equipped with one outlet gate. Despite its age, the condition of Attoyac Dam has not been rated, and it poses a high risk due to its lack of recent inspection or maintenance. The dam's hazard potential is not available, but it remains a key structure in the region's water management system. Although owned privately, the dam is not regulated by the state and has not been subject to enforcement actions.
For those interested in exploring the intersection of water resource management and climate resilience, Attoyac Dam serves as a fascinating case study. Its historical significance, combined with its recreational value, makes it a valuable asset in the region. However, the lack of recent assessments and risk management measures highlight the importance of ongoing monitoring and maintenance to ensure the safety and functionality of this essential infrastructure in Texas.
Year Completed |
1905 |
Dam Length |
2000 |
Dam Height |
9 |
River Or Stream |
TR-ATTOYAC RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
9 |
Nid Storage |
125 |
Structural Height |
9 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
9 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Attoyac Bayou Nr Chireno
|
1200cfs |
Bayou Lanana At Nacogdoches
|
9cfs |
Ayish Bayou Nr San Augustine
|
196cfs |
E Fk Angelina Rv Nr Cushing
|
40cfs |
Angelina Rv Nr Alto
|
328cfs |
Bayou Grand Cane Near Stanley
|
6cfs |
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.
Attoyac Dam