Lost Lake Dam Reservoir Report
Last Updated: December 5, 2025
Lost Lake Dam, located in Randolph County, Arkansas, is a privately owned earth dam completed in 1978 for recreational purposes.
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Summary
Standing at a height of 22 feet and with a hydraulic height of 17 feet, the dam overlooks the scenic Tattle Creek-TR river. With a storage capacity of 92 acre-feet, the dam boasts a low hazard potential and has not been officially rated for its condition.
Despite not being regulated or inspected by the state, Lost Lake Dam serves as a popular spot for outdoor enthusiasts seeking recreational activities such as fishing, boating, and hiking. The dam's serene surroundings and ample storage capacity contribute to its appeal as a destination for water resource and climate enthusiasts. Although it lacks certain safety assessment measures, Lost Lake Dam continues to offer a tranquil escape for visitors seeking a connection with nature in the heart of Arkansas.
Year Completed |
1978 |
Dam Length |
465 |
Dam Height |
22 |
River Or Stream |
TATTLE CREEK-TR |
Primary Dam Type |
Earth |
Hydraulic Height |
17 |
Nid Storage |
92 |
Structural Height |
22 |
Hazard Potential |
Low |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Elevenpoint River Near Ravenden Springs
|
652cfs |
Black River At Pocahontas
|
3170cfs |
Spring River At Imboden
|
563cfs |
Black River At Black Rock
|
4380cfs |
Spring River At Town Branch Bridge At Hardy
|
410cfs |
Eleven Point River Near Bardley
|
572cfs |
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.
Lost Lake Dam