Unnamed Dam Reservoir Report

Last Updated: December 5, 2025

Unnamed Dam, also known as Cla01, is a privately owned structure located in Green Cove Springs, Florida.


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Summary

The dam is regulated by the Florida Department of Environmental Protection and serves the primary purpose of flood risk reduction. It also supports recreation and water supply in the area. Built as an Earth type dam with a height of 13 feet and a hydraulic height of 10 feet, it has a storage capacity of 218 acre-feet and covers a surface area of 19 acres.

Situated on the Mill Log Creek, the dam has a drainage area of 3.81 square miles and is equipped with uncontrolled outlet gates. Despite its low hazard potential and a condition assessment that is yet to be rated, the dam has a normal storage capacity of 32 acre-feet. With a length of 690 feet, the dam offers vital flood protection to the surrounding area. The last inspection was conducted in May 2017, emphasizing the importance of regular maintenance and monitoring to ensure the safety and functionality of this essential water resource infrastructure for the local community.

For water resource and climate enthusiasts, Unnamed Dam presents an intriguing case study in dam management and regulation. While serving as a critical tool for flood risk reduction, the dam also contributes to recreational activities and water supply in the region. Its location, design, and capacity highlight the intricate balance between human development and environmental sustainability. As the dam continues to play a crucial role in water management in Clay County, Florida, ongoing inspections and maintenance efforts are essential to ensure its continued effectiveness and safety for the community.

Dam Length

690

Dam Height

13

River Or Stream

MILL LOG CREEEK

Primary Dam Type

Earth

Surface Area

19

Hydraulic Height

10

Drainage Area

3.81

Nid Storage

218

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

13
       
Seasonal Comparison

Weather Forecast

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.