Cormorant Lake Reservoir Report

Last Updated: December 21, 2025

Cormorant Lake, also known as Whippoorwill Grove No.


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Summary

2, is a private water resource located in St. Tammany, Louisiana, near the city of Bush. The lake, primarily used for recreation, was completed in 1988 and has a dam height of 10 feet, a hydraulic height of 8 feet, and a structural height of 10 feet. With a storage capacity of 338 acre-feet and a surface area of 33.8 acres, Cormorant Lake provides a picturesque setting for outdoor enthusiasts to enjoy various water-based activities.

Managed by the Louisiana Department of Transportation and Development, this Earth-type dam on Simmons Creek has a spillway width of 60 feet and is rated as having a low hazard potential with satisfactory condition assessment. The dam has been inspected regularly, with the last inspection taking place in December 2016. Despite its moderate risk assessment, Cormorant Lake remains a popular destination for both locals and visitors alike, offering a serene environment for fishing, boating, and other recreational pursuits. As a vital part of the regional water infrastructure, maintaining the safety and integrity of Cormorant Lake is crucial for preserving its natural beauty and ensuring a sustainable water supply for future generations.

Year Completed

1988

Dam Length

860

Dam Height

10

River Or Stream

SIMMONS CREEK

Primary Dam Type

Earth

Surface Area

33.8

Hydraulic Height

8

Drainage Area

1.5

Nid Storage

338

Structural Height

10

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

10
       
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.