Temple Terrace (Se) Gypstack Reservoir Report
Last Updated: December 25, 2025
Temple Terrace (Se) Gypstack is a private-owned earth dam located in Zephyrhills, Florida, along the Hillsborough River.
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Summary
Completed in 1984, this tailings dam stands at a height of 60 feet and has a significant hazard potential, with a very high risk assessment rating. The dam has a controlled spillway type with a width of 16 feet and a maximum discharge capacity of 64 cubic feet per second.
With a storage capacity of 3,900 acre-feet, Temple Terrace (Se) Gypstack covers a surface area of 74 acres and serves primarily for tailings purposes. The dam's structural height reaches 65 feet, with a hydraulic height of 50 feet. Although the last inspection took place in 2005, the condition of the dam is currently not rated, highlighting potential risks associated with its maintenance and operation. Despite being outside USACE jurisdiction, the dam remains a crucial element in the water resource management of the region, necessitating regular monitoring and assessment to ensure public safety and environmental protection.
Year Completed |
1984 |
Dam Length |
8110 |
Dam Height |
60 |
River Or Stream |
HILLSBOROUGH RIVER |
Primary Dam Type |
Earth |
Surface Area |
74 |
Hydraulic Height |
50 |
Drainage Area |
0.27 |
Nid Storage |
3900 |
Structural Height |
65 |
Hazard Potential |
Significant |
Nid Height |
65 |
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.
Temple Terrace (Se) Gypstack