Reservoir No 9 Levee-Complex No 2 Reservoir Report

Last Updated: December 6, 2025

Reservoir No 9 Levee-Complex No 2 is a private-owned structure located in Brazoria, Texas, with a primary purpose classified as "Other".


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Summary

Built in 1968 by BAKER AND LAWSON, this Earth-type dam stands at a height of 7 feet and has a length of 2680 feet. With a storage capacity of 63 acre-feet, it serves as a critical component in managing the water resources of the region.

Situated near the OFF CH-TR-AUSTIN BAYOU, this levee-complex plays a crucial role in flood control and water management in the area. Despite its age, the structure is inspected and regulated by state authorities, ensuring its operational integrity and safety. The lack of spillways and locks indicates a simple yet effective design, with an outlet gate for controlled water release.

With a high risk assessment rating of 2, Reservoir No 9 Levee-Complex No 2 faces potential hazards that require careful monitoring and management. While its condition is currently not rated, the structure's importance in safeguarding the local community from flooding underscores the need for ongoing maintenance and risk mitigation measures. For water resource and climate enthusiasts, this site presents an opportunity to study the intersection of infrastructure, environmental protection, and public safety in the face of changing climate patterns.

Year Completed

1968

Dam Length

2680

Dam Height

7

River Or Stream

OFF CH-TR-AUSTIN BAYOU

Primary Dam Type

Earth

Hydraulic Height

7

Nid Storage

63

Structural Height

7

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

7
       
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.