Stj05 dam
Stj05
Stj05 is a private dam located in Ponte Vedra Beach, Florida, along the Intercoastal Waterway. Owned by a private entity, the dam is regulated by the state and has permits for inspection and enforcement. Its primary purpose is flood risk reduction, with additional benefits for recreation and water supply. The dam is classified as an Earth type, with a height of 7 feet and a hydraulic height of 5 feet.
With a storage capacity of 198 acre-feet and a surface area of 27 acres, Stj05 plays a crucial role in managing water resources in the area. Despite its fair condition assessment in 2017, the dam's hazard potential is considered high, with a very high risk assessment ranking. It has a controlled spillway type with a width of 6 feet, and no associated locks. The dam's risk management measures and emergency action plan status are currently undisclosed, highlighting the need for continued monitoring and maintenance to ensure the safety and sustainability of this important water resource infrastructure.
Water resource and climate enthusiasts will find Stj05 to be a fascinating case study in dam management and risk assessment. Its location in a high-risk area and the various purposes it serves make it a critical piece of infrastructure for flood control and water supply. As the dam undergoes periodic inspections and assessments, stakeholders must remain vigilant in implementing necessary risk management measures to protect the surrounding communities and the environment. Stj05 serves as a reminder of the complex interplay between water resources, infrastructure, and climate resilience in the face of changing environmental conditions.
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 Stj05 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Julington Crk At Old St August Rd Nr Bayard | 169 cfs | → |
| Pottsburg Creek Nr South Jacksonville | 25 cfs | → |
| St. Johns River At Jacksonville | 161,000 cfs | → |
| Cedar River At San Juan Ave At Jacksonville | 27 cfs | → |
| Ortega River At Kirwin Rd Nr Jacksonville | 5 cfs | → |
| North Fork Black Creek Nr Middleburg | 25 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Stj05.
Boat launches
- West Palm Vally Landing
- Six Mile Landing
- Oak Harbor
- Beach Boulevard 9540, Jacksonville
- Hood Landing Road 12903, Jacksonville
- Joe Carlucci - Sisters Creek
Campgrounds
- Osprey Cove Military - Mayport Ns
- Hanna City Park
- Pelican Roost Rv Military - Mayport Ns
- Huguenot City Park
- Jacksonville Nas Rv Military
- Little Talbot Island State Park
Fishing spots
Paddle runs
- Begins Approximately 1 Mile Upstream Of Flea Hill, Georgia To The Bells River Confluence
- The Confluence Of The North Prong And Middle Prong To Trader's Hill
- Begins Approximately 1 Mile Downstream Of U.S. 301 Crossing To Ends Approximately 1 Mile Upstream Of Flea Hill, Georgia
- Trader's Hill To Ends Approximately 1 Mile Downstream Of U.S. 301 Crossing
Track Stj05 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 Stj05
Where does the data for Stj05 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 High 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 Stj05.