Edward Medard Reservoir Dam Reservoir Report

Nearby: Hil12 Hil13

Last Updated: December 5, 2025

The Edward Medard Reservoir Dam, also known as the Pleasant Grove Structure, is a state-owned dam located in Hillsborough, Florida.


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Summary

Completed in 1977, this earth dam stands at a height of 40 feet and serves a primary purpose of flood risk reduction. It also provides recreational opportunities and a water supply for the surrounding area.

With a maximum storage capacity of 16,380 acre-feet and a normal storage level of 8,280 acre-feet, the Edward Medard Reservoir Dam plays a crucial role in managing water resources in the region. The dam is situated on the Little Alafia River and covers a surface area of 770 acres, with a drainage area of 29.6 square miles. Despite being classified as having a high hazard potential, the dam's condition was assessed as satisfactory as of September 2014.

Managed by the Southwest Florida Water Management District, the Edward Medard Reservoir Dam is subject to state regulation, permitting, inspection, and enforcement. With its strategic location and vital functions in flood control and water supply, this dam is a significant infrastructure asset for both water resource management and climate resilience in the region.

Year Completed

1977

Dam Length

7150

Dam Height

40

River Or Stream

LITTLE ALAFIA RIVER

Primary Dam Type

Earth

Surface Area

770

Hydraulic Height

28

Drainage Area

29.6

Nid Storage

16380

Structural Height

42

Hazard Potential

High

Foundations

Soil

Nid Height

42
       
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.