Hercules Lake 1 dam
Hercules Lake 1
Hercules Lake 1, located in Nassau County, Florida, is a privately owned earth dam structure completed in 1970 for fire protection, stock, or small fish pond purposes. With a dam height of 10 feet and a length of 400 feet, this reservoir has a storage capacity of 51 acre-feet and covers a surface area of 5 acres. Situated on Pigeon Creek, this low hazard potential dam serves as a recreational spot in the city of Kings Ferry.
Despite being regulated by the state and meeting inspection, permitting, and enforcement requirements, Hercules Lake 1 has not been rated for its condition assessment. This 51-acre reservoir, with its primary purpose of providing fire protection and recreational opportunities, offers a serene environment for water resource and climate enthusiasts to explore and enjoy. As a part of the Jacksonville District, this dam contributes to the local watershed management and provides valuable resources for the surrounding community.
With its scenic location and potential for outdoor activities, Hercules Lake 1 stands as an essential water resource in Nassau County. As water levels are monitored and safety protocols are in place, this privately owned reservoir continues to serve its primary purposes while offering a beautiful setting for visitors to appreciate and enjoy the natural environment.
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 1 -- 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 1.
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
- Stephen C. Foster State Park
- Crooked River State Park
- Eagle Hammock Rv Military - Kings Bay Nsb
- Sea Camp - Cumberland Island Natl Seashore
- 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 1 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 1
Where does the data for Hercules Lake 1 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 1.