Hercules Lake 3 dam
Hercules Lake 3
Hercules Lake 3, located in Nassau, Florida, is a privately owned water resource with a primary purpose of fire protection, stock, or small fish pond, as well as recreation. The earth dam, standing at a height of 15 feet and a length of 400 feet, was completed in 1970 and has a storage capacity of 51 acre-feet. This low hazard potential structure on Pigeon Creek is regulated by the state of Florida, with permitting, inspection, and enforcement processes in place to ensure its safety and functionality.
Despite its relatively small surface area of 3 acres and drainage area of 0 acres, Hercules Lake 3 plays a crucial role in providing water for fire protection and supporting recreational activities in the area. With a low hazard potential and a not yet rated condition assessment, this water resource remains a valuable asset to the community. The dam has not been modified in recent years, and there are no associated structures or emergency action plans in place, indicating a need for further evaluation and risk assessment to ensure its long-term sustainability and safety for both humans and wildlife.
As water resource and climate enthusiasts, it is important to monitor and assess structures like Hercules Lake 3 to understand their impact on the surrounding environment and their potential vulnerabilities to changing climate conditions. By staying informed about the condition and regulatory oversight of such dams, we can work towards sustainable water management practices that prioritize safety, environmental conservation, and community resilience in the face of a changing climate.
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 Hercules Lake 3 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| North Prong St. Marys River At Moniac | 0 cfs | → |
| St. Marys River Nr Macclenny | 38 cfs | → |
| Satilla River At Atkinson | 88 cfs | → |
| St. Johns River At Jacksonville | 161,000 cfs | → |
| Cedar River At San Juan Ave At Jacksonville | 27 cfs | → |
| Suwannee River At Us 441 | 16 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hercules Lake 3.
Boat launches
- Buchannon Drive Charlton County
- Trader's Hill Boat Ramp
- Bill Johnson Road 2378, Hilliard
- Burnt Fort Road 12100, White Oak
- Highway 17 3930, Yulee
- St George Boat Ramp
Campgrounds
- Traders Hill County Park
- Crooked River State Park
- Eagle Hammock Rv Military - Kings Bay Nsb
- Sea Camp - Cumberland Island Natl Seashore
- Stephen C. Foster State Park
- Pioneer Camping
Fishing spots
- Bethesda Pond
- Laura S Walker Lake
- Pope Duval East Pond
- Jekyll Island Fishing Center
- Hanna Lake Park
- Doctors Lake
Paddle runs
- 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
- Begins Approximately 1 Mile Upstream Of Flea Hill, Georgia To The Bells River Confluence
- The Headwaters To The Suwannee River Sill At River Mile 238
- The Suwannee River Sill At River Mile 238 To The Little River Springs At River Mile 81
- The Confluence Of The North Prong And Middle Prong To Trader's Hill
Track Hercules Lake 3 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 Hercules Lake 3
Where does the data for Hercules Lake 3 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 Hercules Lake 3.