S-26 Reservoir Report

Nearby: S-25b S-25

Last Updated: December 4, 2025

Located in Miami-Dade, Florida, S-26 is a state-owned structure designed for flood risk reduction on the Miami River (North Fork).


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Summary

Built in 1974, this dam stands at 25 feet high and spans 280 feet in length, with a maximum storage capacity of 1,460 acre-feet. The primary purpose of S-26 is flood risk reduction, with a significant hazard potential and a condition assessment that is currently not rated.

Despite being last inspected in 1905, S-26 is regulated, permitted, inspected, and enforced by the state of Florida, demonstrating a commitment to maintaining its functionality and safety. The dam's location in Miami, a city vulnerable to sea-level rise and extreme weather events due to climate change, highlights the importance of effective water resource management in the face of a changing climate. With a capacity to handle a maximum discharge of 3,470 cubic feet per second, S-26 plays a crucial role in mitigating flood risks and protecting the surrounding area from potential inundation.

Year Completed

1974

Dam Length

280

Dam Height

25

River Or Stream

MIAMI RIVER (NORTH FORK)

Primary Dam Type

Other

Surface Area

58

Hydraulic Height

25

Nid Storage

1460

Structural Height

16

Hazard Potential

Significant

Nid Height

25
       
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.