Arkno Name 350 Reservoir Report

Last Updated: December 5, 2025

Arkno Name 350 is a privately owned earth dam located in Washington County, Arkansas, along the Hickory Creek-TR river.


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Summary

Built in 1964 for recreational purposes, this dam has a hydraulic height of 12 feet and a structural height of 14 feet, with a length of 300 feet. With a maximum storage capacity of 56 acre-feet and a normal storage capacity of 24 acre-feet, Arkno Name 350 serves as a low-hazard structure with a condition assessment of "Not Rated."

Despite being privately owned, Arkno Name 350 is not regulated or inspected by state agencies, and does not require permitting or enforcement. The dam has not been modified in recent years and lacks certain safety features such as spillways or outlet gates. The risk assessment and management measures for this dam are currently unknown, and emergency action plans and inundation maps have not been prepared.

Although Arkno Name 350 may not have the same level of oversight as some publicly owned dams, its low hazard potential indicates a lower risk for potential failures. However, the lack of recent inspections and safety features raises concerns about the structure's overall safety and resilience in the face of changing climate conditions and increasing water resource demands. Water resource and climate enthusiasts should keep an eye on developments related to Arkno Name 350 to ensure the continued safety and sustainability of this recreational dam.

Year Completed

1964

Dam Length

300

River Or Stream

HICKORY CREEK-TR

Primary Dam Type

Earth

Hydraulic Height

12

Nid Storage

56

Structural Height

14

Hazard Potential

Low

Nid Height

14
       
Seasonal Comparison

Weather Forecast

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.