Coronet No. 4 dam
Coronet No. 4
Coronet No. 4 is a private dam located in Plant City, Florida, on the Alafia River. Built in 1930 for tailings storage, this earth dam stands at a height of 9 feet with a hydraulic height of 8 feet and a structural height of 10 feet. With a storage capacity of 1100 acre-feet and a surface area of 131 acres, Coronet No. 4 serves a crucial purpose in managing water resources in the region.
The dam has a controlled spillway type with a width of 3 feet and a maximum discharge capacity of 20 cubic feet per second. Its significant hazard potential and very high risk assessment rating highlight the importance of regular inspections and maintenance to ensure public safety and water resource stability. Although the condition assessment is currently listed as "Not Rated," ongoing regulatory oversight by the Florida Department of Environmental Protection ensures that Coronet No. 4 remains in compliance with state regulations.
Despite its age, Coronet No. 4 continues to play a vital role in water management and flood control for Hillsborough County. With a history dating back over 90 years, this dam stands as a testament to the engineering ingenuity of its time and the ongoing efforts to safeguard water resources and climate resilience in the region.
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.
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 Coronet No. 4 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| North Prong Alafia River At Keysville Fl | 28 cfs | → |
| North Prong Alafia River Near Nichols Fl | 23 cfs | → |
| Baker Creek At Mcintosh Road Near Antioch Fl | · | → |
| Blackwater Creek Near Knights Fl | 3 cfs | → |
| Lake Parker Outlet At Lakeland Fl | 1 cfs | → |
| Banana-Hancock Canal Nr Highland City | · | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Coronet No. 4.
Boat launches
- Alligator Alley, Plant City
- Sikes Boulevard Lakeland
- Lake Bonny Drive East 101-199, Lakeland
- Granada Street 648-998, Lakeland
- Tenoroc Trail Auburndale
- Alderman's Ford Park Trail Hillsborough County
Campgrounds
- Edward Medard
- Alderman's Ford Park Campsite 3
- Alderman's Ford Park Campsite 4
- Alderman's Ford Park Campsite 2
- Alderman's Ford Park Campsite 1
- Saddle Creek County Park
Fishing spots
Track Coronet No. 4 in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Coronet No. 4
Where does the data for Coronet No. 4 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 Significant 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 above 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Coronet No. 4.