Hemphill Lake Dam Reservoir Report
Last Updated: December 21, 2025
Hemphill Lake Dam, located in St.
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Summary
Tammany, Louisiana, is a privately owned structure with a primary purpose of recreation. Completed in 1982, this earth dam stands at a height of 12 feet and has a hydraulic height of 10 feet, providing a maximum storage capacity of 300 acre-feet. With a spillway width of 50 feet and a low hazard potential, the dam is equipped with uncontrolled spillways to manage water discharge.
Despite its recreational function, Hemphill Lake Dam is in poor condition, as indicated by a 2016 assessment. The dam is inspected every five years, with the last inspection conducted in March 2016. The risk assessment for the structure is moderate, with a score of 3 out of 5. While the dam is not under the jurisdiction of any federal agency, it is regulated by the Louisiana Department of Transportation and Development, ensuring compliance with state safety and inspection protocols.
Water resource and climate enthusiasts interested in Hemphill Lake Dam can appreciate its role in providing recreational opportunities while also recognizing the importance of maintaining its structural integrity to mitigate potential risks. With a focus on risk management measures and regular inspections, the dam serves as a reminder of the delicate balance between water resource utilization and safety in the face of changing climatic conditions.
Year Completed |
1982 |
Dam Length |
730 |
Dam Height |
12 |
River Or Stream |
RED OAK FORK\E.FORK BOGUE FAL |
Primary Dam Type |
Earth |
Surface Area |
25 |
Hydraulic Height |
10 |
Drainage Area |
2 |
Nid Storage |
300 |
Structural Height |
12 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bogue Chitto River Near Bush
|
769cfs |
Tchefuncta River Near Folsom
|
65cfs |
Pearl River Near Bogalusa
|
2410cfs |
West Hobolochitto Creek Nr Mcneill
|
34cfs |
Tangipahoa River At Robert
|
403cfs |
East Hobolochitto Creek Nr Caesar
|
20cfs |
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.
Hemphill Lake Dam