Arnoname 136 Reservoir Report

Last Updated: December 5, 2025

Arnoname 136, also known as Ark No Name 136 Dam, is a private water supply structure located in Garland County, Arkansas.


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Summary

Completed in 1962, this earth dam serves the primary purpose of providing water supply to the region. With a hydraulic height of 14 feet and a structural height of 17 feet, Arnoname 136 stands at a length of 761 feet and has a storage capacity of 61 acre-feet.

Situated on the Ouachita River in Hot Springs, Arnoname 136 plays a significant role in water resource management in the area. Despite being privately owned and not regulated by the state, this dam has a hazard potential deemed as significant. With no recent condition assessment, inspection frequency, or emergency action plan in place, there are some concerns regarding the safety and maintenance of this vital water infrastructure.

As water resource and climate enthusiasts continue to monitor the impacts of dams on the environment and communities, understanding the details of structures like Arnoname 136 becomes crucial. With its historical significance and essential role in water supply, ensuring the proper management and maintenance of this dam is essential for sustainable water resource management in the region.

Year Completed

1962

Dam Length

761

River Or Stream

OUACHITA RIVER-TR

Primary Dam Type

Earth

Hydraulic Height

14

Nid Storage

61

Structural Height

17

Hazard Potential

Significant

Nid Height

17
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.