Settling Area No 3 Reservoir Report

Last Updated: December 6, 2025

Settling Area No 3 in Polk, Florida is a private earth dam completed in 1971 with a primary purpose of containing tailings.


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Summary

Located in the S30 T30S R24E coordinates, this dam stands at a height of 16 feet and has a structural height of 11 feet, providing a storage capacity of 51 acre-feet. Settling Area No 3 is situated along the North Prong Alafia River, within the jurisdiction of the state of Florida, and is regulated, permitted, inspected, and enforced by state agencies.

Despite its relatively small surface area of 3 acres and limited drainage area, Settling Area No 3 poses a significant hazard potential due to its condition assessment being labeled as "Not Rated." The dam has not been rated for its risk management measures, emergency action plan readiness, or inundation mapping, highlighting potential vulnerabilities in the event of a major weather event or structural failure. With no designated emergency contacts or updated risk assessment, further evaluation and maintenance may be necessary to ensure the safety and integrity of this structure for water resource and climate enthusiasts in the area.

Year Completed

1971

Dam Length

660

Dam Height

16

River Or Stream

NORTH PRONG ALAFIA RIVER

Primary Dam Type

Earth

Surface Area

3

Hydraulic Height

16

Nid Storage

51

Structural Height

11

Hazard Potential

Significant

Nid Height

16
       
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.