Marshall Road Dam Reservoir Report

Last Updated: December 19, 2025

Marshall Road Dam, located in De Soto, Louisiana, is a privately owned structure that was completed in 2017 by designer Enoch J.


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Summary

French, P.E., P.L.S. This earth dam stands at a height of 18 feet and has a length of 969 feet, with a primary purpose classified as "Other." The dam provides a maximum storage capacity of 86 acre-feet, with a normal storage level of 60 acre-feet on its 10-acre surface area. Despite its low hazard potential and moderate risk assessment rating, the dam is not currently rated for its condition.

The dam is regulated, permitted, inspected, and enforced by the Louisiana Department of Transportation and Development (LADOTD). It features an uncontrolled spillway type and is equipped with needle outlet gates. The last inspection took place in June 2018, with an inspection frequency of 5 years. While the dam's emergency action plan (EAP) status and risk management measures are not specified in the data, the structure is deemed to have a moderate risk assessment level, indicating a level of potential concern for water resource and climate enthusiasts.

Overall, Marshall Road Dam plays a crucial role in water resource management in the region, offering storage and flood control benefits. Its design, construction, and regulatory oversight ensure its functionality and safety for the surrounding community. With its unique characteristics and operational features, the dam presents an interesting case study for those interested in the intersection of water resources, climate change, and infrastructure management.

Year Completed

2017

Dam Length

969

Dam Height

18

River Or Stream

N/A

Primary Dam Type

Earth

Surface Area

10

Hydraulic Height

18

Drainage Area

1.3

Nid Storage

86

Structural Height

18

Outlet Gates

Needle - 0

Hazard Potential

Low

Foundations

Soil

Nid Height

18
       
Seasonal Comparison

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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.