Peter Mulhearn Dam Reservoir Report
Last Updated: December 28, 2025
Peter Mulhearn Dam, located in Guyton, Louisiana, is a private-owned structure built for recreational purposes along the TR-Guyton Creek.
°F
°F
mph
Wind
%
Humidity
Summary
This Earth-type dam stands at a height of 9 feet and spans 385 feet in length, with a storage capacity of 60.8 acre-feet. Despite its relatively low hazard potential and fair condition assessment, the dam is regulated and inspected by the Louisiana Department of Transportation and Development to ensure its safety and compliance with state standards.
The dam features an uncontrolled spillway and is surrounded by a surface area of 6.76 acres, offering opportunities for outdoor activities and water recreation in the Ouachita County region. While the structure has not undergone recent modifications or improvements, regular inspections are conducted every five years to monitor its integrity and assess any potential risks. With its moderate risk assessment rating and the presence of emergency protocols, Peter Mulhearn Dam serves as both a functional water resource and a scenic attraction for visitors to enjoy in a tranquil natural setting.
Overall, Peter Mulhearn Dam is a vital part of the local water infrastructure, providing both recreational benefits and essential flood control measures along the TR-Guyton Creek. Its presence enhances the environmental and social landscape of the area, offering a peaceful retreat for water resource and climate enthusiasts to appreciate and explore. As a regulated and maintained structure, the dam ensures the safety and well-being of the surrounding community while preserving the natural beauty of Ouachita, Louisiana.
Dam Length |
385 |
Dam Height |
9 |
River Or Stream |
TR-GUYTON CREEK |
Primary Dam Type |
Earth |
Surface Area |
6.76 |
Nid Storage |
60.8 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
9 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bayou Lafourche Near Crew Lake
|
60cfs |
Boeuf River Nr Girard
|
155cfs |
Dugdemona River Near Joyce
|
50cfs |
Saline Bayou Near Lucky
|
27cfs |
Little Corney Bayou Near Lillie
|
98cfs |
Little River Near Rochelle
|
90cfs |
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.
Peter Mulhearn Dam