Hil20 Dam
Hil20
Hil20 is a privately owned earth dam located in Plant City, Florida, with a primary purpose of storing tailings. The dam stands at a height of 7.65 feet and has a storage capacity of 2,736.8 acre-feet. Situated on an unnamed pond in Hillsborough County, the dam is regulated by the Florida Department of Environmental Protection (FDEP) and is subject to state permitting, inspection, and enforcement.
Although the condition assessment of Hil20 is not rated and its hazard potential is undetermined, it is crucial for water resource and climate enthusiasts to monitor and assess the safety and maintenance of the dam. With its proximity to residential areas and its significant storage capacity, any potential risks or failures could have a substantial impact on the surrounding environment and communities. The presence of associated structures and the lack of a designated emergency action plan (EAP) underscore the importance of ongoing monitoring and risk assessment for this dam.
Given the critical role of dams in water resource management and climate resilience, stakeholders should advocate for the development of a comprehensive EAP, regular inspection and maintenance schedules, and risk management measures for Hil20. Collaborative efforts between the private owner, regulatory agencies, and the local community are essential to ensure the safety and integrity of this dam and to mitigate any potential risks to the environment and public safety.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Hil20 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| South Prong Alafia River Near Ft Lonesome Fl | 48 cfs | → |
| South Prong Alafia River Near Lithia Fl | 121 cfs | → |
| Little Manatee River Near Ft. Lonesome Fl | 39 cfs | → |
| North Prong Alafia River At Keysville Fl | 67 cfs | → |
| Alafia River At Lithia Fl | 82 cfs | → |
| South Fork Little Manatee River Near Parrish Fl | 38 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hil20.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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More reservoirs
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About Hil20
Where does the data for Hil20 come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Undetermined hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card below for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
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.
- 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.
- 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.
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, environmental 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.