Stj05 Reservoir Report
Nearby: Lake Vedra Dam Stj04
Last Updated: December 5, 2025
Stj05 is a private dam located in Ponte Vedra Beach, Florida, along the Intercoastal Waterway.
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Summary
Owned by a private entity, the dam is regulated by the state and has permits for inspection and enforcement. Its primary purpose is flood risk reduction, with additional benefits for recreation and water supply. The dam is classified as an Earth type, with a height of 7 feet and a hydraulic height of 5 feet.
With a storage capacity of 198 acre-feet and a surface area of 27 acres, Stj05 plays a crucial role in managing water resources in the area. Despite its fair condition assessment in 2017, the dam's hazard potential is considered high, with a very high risk assessment ranking. It has a controlled spillway type with a width of 6 feet, and no associated locks. The dam's risk management measures and emergency action plan status are currently undisclosed, highlighting the need for continued monitoring and maintenance to ensure the safety and sustainability of this important water resource infrastructure.
Water resource and climate enthusiasts will find Stj05 to be a fascinating case study in dam management and risk assessment. Its location in a high-risk area and the various purposes it serves make it a critical piece of infrastructure for flood control and water supply. As the dam undergoes periodic inspections and assessments, stakeholders must remain vigilant in implementing necessary risk management measures to protect the surrounding communities and the environment. Stj05 serves as a reminder of the complex interplay between water resources, infrastructure, and climate resilience in the face of changing environmental conditions.
Dam Length |
83 |
Dam Height |
7 |
River Or Stream |
INTERCOASTAL WATERWAY |
Primary Dam Type |
Earth |
Surface Area |
27 |
Hydraulic Height |
5 |
Drainage Area |
0.41 |
Nid Storage |
198 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
7 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
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