Gravel Hill Road Dam dam
Gravel Hill Road Dam
Gravel Hill Road Dam in Allendale, South Carolina, is a state-regulated structure with a significant hazard potential and a fair condition assessment. Standing at a height of 12 feet and with a storage capacity of 313 acre-feet, this dam plays a crucial role in water resource management in the area. While the specific purposes and types of this dam are not listed, its importance in controlling water flow and storage cannot be understated.
Owned by an entity not listed, Gravel Hill Road Dam is subject to regular state inspections, permitting, and enforcement to ensure its safety and functionality. The last inspection in February 2020 revealed a fair condition, indicating that maintenance and monitoring efforts are ongoing. With a designated emergency action plan (EAP) frequency of 3, this dam is prepared for potential risks and emergencies, although specific details regarding the EAP's status and adherence to guidelines are not provided in the data.
Located at a latitude of 32.9687 and longitude of -81.3929, Gravel Hill Road Dam serves as a vital infrastructure in the South Carolina region, providing storage for water resources and managing potential risks associated with its significant hazard potential. The dam's role in water resource management and its condition assessment underscore the importance of continued monitoring and maintenance to ensure the safety and reliability of this critical structure.
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 Gravel Hill Road Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Savannah R At Burtons Ferry Br Nr Millhaven | 4,880 cfs | → |
| Brier Creek At Millhaven | 168 cfs | → |
| Coosawhatchie River Near Hampton | · | → |
| Salkehatchie River Near Miley | 60 cfs | → |
| Beaverdam Creek Near Sardis | 3 cfs | → |
| Savannah River Near Clyo | 4,860 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Gravel Hill Road Dam.
Fishing spots
Track Gravel Hill Road 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 Gravel Hill Road Dam
Where does the data for Gravel Hill Road 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 Significant 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 Gravel Hill Road Dam.