Knoll Lake Dam Reservoir Report
Nearby: Hawg Heaven Pond Bonchasse Dam
Last Updated: December 5, 2025
Knoll Lake Dam, located in De Soto, Louisiana, is a privately owned structure designed by the USDA NRCS for the primary purpose of serving as a Fish and Wildlife Pond.
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Summary
Completed in 2002, this Earth dam stands at a height of 23 feet with a hydraulic height of 21 feet, providing a storage capacity of 207 acre-feet. With a surface area of 18 acres and a drainage area of 0.18 square miles, Knoll Lake Dam plays a crucial role in maintaining water resources for the surrounding area.
Managed by the Louisiana Department of Transportation and Development, Knoll Lake Dam is regulated, inspected, and enforced for safety and environmental compliance. The dam's spillway, with a width of 40 feet, operates as an uncontrolled overflow mechanism to manage excess water flow and prevent flooding. Despite being categorized as having a low hazard potential, the dam's overall condition is assessed as fair, with regular inspections conducted every five years to ensure its structural integrity. Additionally, the risk assessment for Knoll Lake Dam indicates a moderate risk level, highlighting the importance of ongoing monitoring and risk management measures.
As a key feature in the Little Bayou Na Bonchasse watershed, Knoll Lake Dam not only provides recreational opportunities but also supports the local fish and wildlife populations. Its strategic location and design demonstrate a commitment to water resource management and conservation efforts in the region. For water resource and climate enthusiasts, Knoll Lake Dam serves as a noteworthy example of responsible dam construction and operation, showcasing the importance of balancing human needs with environmental sustainability.
Year Completed |
2002 |
Dam Length |
640 |
Dam Height |
23 |
River Or Stream |
LITTLE BAYOU NA BONCHASSE |
Primary Dam Type |
Earth |
Surface Area |
18 |
Hydraulic Height |
21 |
Drainage Area |
0.18 |
Nid Storage |
207 |
Structural Height |
28 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cypress Bayou Near Keithville
|
11cfs |
Bayou San Patricio Near Benson
|
29cfs |
Bayou Grand Cane Near Stanley
|
6cfs |
Red Chute Bayou At Sligo
|
55cfs |
Bayou Pierre Near Lake End
|
323cfs |
Sabine Rv Nr Carthage
|
9200cfs |
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.
Knoll Lake Dam