Armstrong Dam Reservoir Report
Nearby: Graham Dam Joe Mitcham Dam
Last Updated: December 9, 2025
Armstrong Dam, located in Ruston, Louisiana on TR-Cypress Creek, was completed in 1977 by the USDA NRCS and is privately owned for the primary purpose of serving as a Fish and Wildlife Pond.
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Summary
This Earth dam stands at a height of 19 feet, with a structural height of 22 feet and a length of 400 feet, providing a storage capacity of 102 acre-feet. The dam spans across a drainage area of 0.29 square miles and has a spillway width of 80 feet for uncontrolled discharge.
With a low hazard potential and fair condition assessment, Armstrong Dam is regulated by the Louisiana Department of Transportation and Development, with inspections conducted every 5 years. The surrounding area offers recreational opportunities and supports fire protection, stock, and small fish ponds in addition to its primary purpose. The dam's risk assessment is moderate, and while no emergency action plan details were provided, the dam meets regulatory guidelines and is managed to ensure the safety of the community and the environment. Overall, Armstrong Dam serves as a vital resource for water management and conservation in Lincoln County, Louisiana.
Year Completed |
1977 |
Dam Length |
400 |
Dam Height |
19 |
River Or Stream |
TR-CYPRESS CREEK |
Primary Dam Type |
Earth |
Surface Area |
15 |
Hydraulic Height |
19 |
Drainage Area |
0.29 |
Nid Storage |
102 |
Structural Height |
22 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Corney Bayou Near Lillie
|
169cfs |
Saline Bayou Near Lucky
|
38cfs |
Dugdemona River Near Joyce
|
248cfs |
Bayou Lafourche Near Crew Lake
|
625cfs |
Bayou Dorcheat Near Springhill
|
191cfs |
Boeuf River Nr Girard
|
42cfs |
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.
Armstrong Dam