G93 Control Structure
G93 Control Structure is a concrete dam located in Miami-Dade County, Florida, built in 1953. It carries a High hazard potential classification and has a satisfactory condition assessment.
About G93 Control Structure
The primary purpose of G93 Control Structure is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Miami-dade County Department Of Environmental Resources Management (local government). It impounds the C-3 Canal near Coral Gables.
The dam stands 12 feet tall and stretches 150 feet across, creates a reservoir covering 34 acres, has a maximum storage capacity of 280 acre-feet, and collects water from a drainage area of 25 square miles. Completed in 1953, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. Notably, no emergency action plan is currently on file for this high-hazard dam. The most recent inspection on record was 12/09/2024.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Florida dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Florida |
| County | Miami-Dade |
| Nearest City | Coral Gables |
| River/Stream | C-3 Canal |
| Coordinates | 25.73850, -80.28698 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 12 ft |
| Dam Height | 10 ft |
| Dam Length | 150 ft |
| Year Completed | 1953 (73 years old) |
Storage & Hydraulics
| NID Storage | 280 acre-ft |
| Max Storage | 280 acre-ft |
| Normal Storage | 200 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 25 sq mi |
| Max Discharge | 640 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | MIAMI-DADE COUNTY DEPARTMENT OF ENVIRONMENTAL RESOURCES MANAGEMENT |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/09/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | FL76008 |
| Federal ID | FL76008 |
| More Info | State Dam Safety Program |