Holly Oaks Lake Dam, located in Jacksonville, Florida, serves multiple purposes including flood risk reduction, recreation, and water supply.
Wind
Humidity
This private dam is regulated by the Florida Department of Environmental Protection and has a significant hazard potential with a fair condition assessment. The dam stands at a height of 6 feet with a hydraulic height of 4 feet and a length of 495 feet, holding a maximum storage capacity of 64 acre-feet and a normal storage of 51 acre-feet.
Situated on the Mill Cove-St. Johns river/stream, Holly Oaks Lake Dam's spillway is uncontrolled with a width of 6 feet. Although the dam has a moderate risk assessment rating of 3, it has not been modified in recent years and lacks outlet gates. The last inspection in May 2017 deemed the dam to be in fair condition, highlighting the importance of regular monitoring and maintenance to ensure the safety and integrity of this vital water resource structure in Duval County, Florida.
Enthusiasts of water resources and climate will find Holly Oaks Lake Dam to be a fascinating case study in dam engineering and management. With its diverse purposes, significant hazard potential, and unique design features, this private earth dam presents a complex yet critical piece of infrastructure in the flood-prone region of Jacksonville. As climate change continues to impact water resources, the maintenance and regulation of structures like Holly Oaks Lake Dam become increasingly important to mitigate risks and ensure the sustainable utilization of water for the community.
Dam Length |
495 |
Dam Height |
6 |
River Or Stream |
MILL COVE-ST. JOHNS |
Primary Dam Type |
Earth |
Surface Area |
24 |
Hydraulic Height |
4 |
Drainage Area |
1.96 |
Nid Storage |
64 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
6 |
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