S-25b Reservoir Report

Nearby: S-26 S-25

Last Updated: December 4, 2025

S-25b is a state-regulated dam located in Miami-Dade, Florida, along the Tamiami Canal (C-4).


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Summary

Completed in 1976, this earth dam stands at a height of 21 feet and serves the primary purpose of flood risk reduction. With a storage capacity of 1,500 acre-feet and a surface area of 71 acres, S-25b plays a crucial role in managing water levels and mitigating flood risks in the area.

Despite its low hazard potential and a lack of recent condition assessments, S-25b remains a vital infrastructure for water resource management in the region. The dam has not been rated for its current condition, and its last inspection dates back to 1905, indicating a potential need for updated assessments and evaluations. As water resource and climate enthusiasts, it is essential to monitor the maintenance and regulatory oversight of S-25b to ensure its continued effectiveness in flood risk reduction and water management efforts.

As enthusiasts interested in water resource management and climate resilience, understanding the significance of infrastructure like S-25b is crucial for safeguarding communities against potential flood hazards. With a focus on state-regulated operations and a history dating back to the 1970s, S-25b represents a key asset in maintaining water levels and protecting the surrounding area from flooding events. Continued monitoring and assessment of the dam's condition and regulatory compliance are essential to ensure its long-term functionality and effectiveness in water resource management.

Year Completed

1976

Dam Length

160

Dam Height

21

River Or Stream

TAMIAMI CANAL (C-4)

Primary Dam Type

Earth

Surface Area

71

Hydraulic Height

21

Nid Storage

1500

Structural Height

15

Hazard Potential

Low

Nid Height

21
       
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.