S-70 Reservoir Report
Nearby: Hickory Brch Dm2 Hickory Brch Dm1
Last Updated: December 5, 2025
S-70 is a state-regulated earth dam located in Glades, Florida, along the C-41 (Harney Pond Canal).
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Summary
Built in 1961 by the state of Florida for flood risk reduction, this dam stands at 29 feet in height and spans 150 feet in length. It has a storage capacity of 2,780 acre-feet and covers a surface area of 96 acres. Despite its low hazard potential, the dam is not currently rated for its condition and has not undergone recent inspections.
The dam is owned and operated by the state of Florida, with all necessary permitting, inspection, and enforcement responsibilities falling under the state's jurisdiction. Although there are no associated structures or locks, S-70 plays a crucial role in managing water levels and reducing flood risks in the region. The dam's location in Little Sarasota, along with its proximity to the Jacksonville District of the US Army Corps of Engineers, highlights its importance in safeguarding the local community and surrounding areas from potential water-related disasters. Water resource and climate enthusiasts will find S-70 to be a key infrastructure asset with a significant impact on flood control efforts in the region.
Year Completed |
1961 |
Dam Length |
150 |
Dam Height |
29 |
River Or Stream |
C-41 (HARNEY POND CANAL) |
Primary Dam Type |
Earth |
Surface Area |
96 |
Hydraulic Height |
29 |
Nid Storage |
2780 |
Structural Height |
25 |
Hazard Potential |
Low |
Nid Height |
29 |
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.
S-70
Florida 70 1970, Lake Placid