Edna Yon Dam dam
Edna Yon Dam
Edna Yon Dam, located in Aiken, South Carolina, is a privately owned earth dam built in 1962 for recreational purposes. Standing at a height of 17 feet and spanning 525 feet in length, the dam provides a surface area of 40 acres and a storage capacity of 316 acre-feet. The dam regulates Hollow Creek and is under the regulatory jurisdiction of the South Carolina Department of Health and Environmental Control (DHEC).
Despite its primary purpose for recreation, Edna Yon Dam has a high hazard potential and poor condition assessment, as determined during the last inspection in February 2021. With a history of modifications dating back to its completion, the dam poses a significant risk that requires proper risk management measures to ensure the safety of surrounding communities. As climate change continues to impact water resources and infrastructure, the importance of monitoring and maintaining dams like Edna Yon becomes increasingly crucial in safeguarding against potential hazards and emergencies.
As water resource and climate enthusiasts, understanding the critical role of dams like Edna Yon in water management and safety is vital in addressing the challenges posed by changing environmental conditions. By staying informed about the condition and regulatory oversight of dams, enthusiasts can advocate for proactive measures to mitigate risks and ensure the long-term resilience of water infrastructure 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 Edna Yon Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| South Fork Edisto River Near Denmark | 214 cfs | → |
| South Fork Edisto River Near Cope | 217 cfs | → |
| Mctier Creek (Rd 209) Near Monetta | 1 cfs | → |
| North Fork Edisto River At Orangeburg | 222 cfs | → |
| South Fork Edisto River Near Bamberg | 215 cfs | → |
| Congaree River At Columbia | 2,340 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Edna Yon Dam.
Boat launches
- Savannah Highway Neeses
- Shillings Bridge Road Orangeburg County
- Bobcat Landing Road , 29003
- Cabana Way Lexington County
- Cannon Bridge Road ,
- Sandlapper Way 159, Lexington County
Campgrounds
Fishing spots
Track Edna Yon Dam 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 Edna Yon Dam
Where does the data for Edna Yon Dam 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 Edna Yon Dam.