Structure 221 dam
Structure 221
Structure 221, also known as Cox Creek Structure, is a state-owned flood risk reduction infrastructure located in Cocoa, Florida. Built in 1971, this structure plays a crucial role in managing the water levels in Cox Creek Levee-73, with a dam height of 28 feet and a storage capacity of 84,000 acre-feet. Its primary purpose is flood risk reduction, serving as a vital component in safeguarding the surrounding area from potential water-related disasters.
Managed by the Jacksonville District of the US Army Corps of Engineers, Structure 221 has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. While its last inspection date and other key assessment details are not provided, the structure remains a key asset in the region's water resource management system. With a focus on state regulation, permitting, inspection, and enforcement, Structure 221 exemplifies the collaborative efforts between state and federal agencies to ensure the safety and sustainability of water resources in Osceola County.
Water resource and climate enthusiasts will find Structure 221 to be a fascinating case study in flood risk reduction infrastructure. With its strategic location, design specifications, and operational history, this structure serves as a critical line of defense against potential flooding events in the region. As climate change continues to impact water resources, the role of structures like 221 becomes increasingly important in maintaining the resilience and sustainability of our water management systems.
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 Structure 221 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Wolf Creek Near Deer Park | 1 cfs | → |
| St. Johns River Nr Cocoa | 235 cfs | → |
| Pennywash Creek Nr Deer Park | 2 cfs | → |
| Jane Green Creek Near Deer Park | 0 cfs | → |
| St. Johns River Near Melbourne Fla | 74 cfs | → |
| St. Johns River Nr Christmas | 386 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Structure 221.
⚓ Boat launches
- Florida 520 8199, Cocoa
- Florida 520 8190, Cocoa
- Trout Lake
- Lee Wenner Park
- Lake Washington Road 6000, Melbourne
- Bass Highway 6719, Osceola County
⛺ Campgrounds
- Jane Green
- Manatee Hammock Park
- Moss Park Campground
- Moss/Split Oak
- Wickham Park
- Manatee Cove Military - Patrick Afb
🎣 Fishing spots
More fishing →Track Structure 221 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 Structure 221
Where does the data for Structure 221 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 Low 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 Structure 221.