Duthu Lake Reservoir Report
Last Updated: December 5, 2025
Duthu Lake, also known as Chewalla Lake, is a private water resource located in the state of Mississippi, specifically in Humphreys County near the city of Isola.
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Summary
Built in 1976 by the USDA NRCS, this Earth dam stands at a height of 8 feet and has a storage capacity of 600 acre-feet. The primary purpose of Duthu Lake is classified as 'Other', with low hazard potential and a moderate risk assessment rating.
Situated on the TR- Jackson Bayou, Duthu Lake spans a length of 9240 feet with an uncontrolled spillway type and a maximum discharge rate of 14 cubic feet per second. While the dam is not state-regulated, inspected, or permitted, it serves as an important water management structure in the region, contributing to the conservation efforts of the Natural Resources Conservation Service. Despite being privately owned, Duthu Lake offers a valuable resource for water and climate enthusiasts interested in exploring the diverse hydrological landscape of Mississippi.
Year Completed |
1976 |
Dam Length |
9240 |
Dam Height |
8 |
River Or Stream |
TR- JACKSON BAYOU |
Primary Dam Type |
Earth |
Hydraulic Height |
8 |
Nid Storage |
600 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
8 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Big Sunflower River At Sunflower
|
1370cfs |
Abiaca Creek At Cruger
|
44cfs |
Bogue Phalia Nr Leland
|
1110cfs |
Harland Creek Nr Howard
|
3340cfs |
Tallahatchie River At Money
|
6080cfs |
Big Sunflower River Nr Merigold
|
703cfs |
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.
Duthu Lake