Mosaic Csa Bf3 Reservoir Report

Last Updated: December 6, 2025

Mosaic Csa Bf3, also known as Mobil Big Four Bf3, is a privately owned dam located in Hillsborough, Florida, along the Alafia River.


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Summary

Built in 1984, this earth dam stands at a height of 50 feet with a hydraulic height of 45 feet and a structural height of 52 feet. It serves the primary purpose of storing tailings and has a maximum storage capacity of 19,500 acre-feet.

With a surface area of 407 acres and a drainage area of 65 square miles, Mosaic Csa Bf3 has a significant hazard potential and is classified as having a very high risk level. The dam features a controlled spillway with a width of 64 feet and a maximum discharge capacity of 320 cubic feet per second. Despite its importance for water resource management, this dam has not been assessed for condition and does not have an emergency action plan in place.

Given its critical role in the region's water infrastructure, Mosaic Csa Bf3 warrants close monitoring and management to ensure its continued safety and effectiveness. With its location in a high-risk area and lack of recent inspection data, stakeholders and regulators must prioritize the assessment and maintenance of this dam to mitigate potential risks and protect the surrounding community and environment from water resource and climate-related challenges.

Year Completed

1984

Dam Length

15400

Dam Height

50

River Or Stream

ALAFIA RIVER

Primary Dam Type

Earth

Surface Area

407

Hydraulic Height

45

Drainage Area

65

Nid Storage

19500

Structural Height

52

Hazard Potential

Significant

Nid Height

52
       
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.