Cypress Black Bayou Site 1 Reservoir Report

Last Updated: December 25, 2025

Cypress Black Bayou Site 1, also known as Cypress Bayou, is a local government-owned water resource located in Bossier City, Louisiana.


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Summary

Managed by the USDA NRCS, this site serves multiple purposes, including fish and wildlife pond, irrigation, and recreation. The primary dam type is earth, with a height of 46 feet and a hydraulic height of 30 feet, providing a normal storage capacity of 25,000 acre-feet.

Constructed in 1975, Cypress Black Bayou Site 1 spans 7,100 feet in length and covers a surface area of 3,100 acres, with a maximum storage capacity of 77,000 acre-feet. The dam's spillway type is uncontrolled, with a width of 300 feet, and it features vertical lift outlet gates. Despite its fair condition assessment as of September 2020, the site has a high hazard potential and moderate risk, as assessed by the state regulatory agency, LA DOTD.

Water resource and climate enthusiasts will find Cypress Black Bayou Site 1 to be an intriguing location for its ecological importance and recreational opportunities. With its significant storage capacity and diverse purposes, this site stands as a vital resource for the surrounding community, offering a glimpse into the intersection of water management, wildlife conservation, and public engagement in a dynamic environment like Cypress Bayou.

Year Completed

1975

Dam Length

7100

Dam Height

46

River Or Stream

CYPRESS BAYOU

Primary Dam Type

Earth

Surface Area

3100

Hydraulic Height

30

Drainage Area

155

Nid Storage

77000

Structural Height

49

Outlet Gates

Vertical Lift

Hazard Potential

High

Foundations

Soil

Nid Height

49
       
Seasonal Comparison

Weather Forecast

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.