Harbison Structure 9 dam
Harbison Structure 9
Harbison Structure 9, located in Lexington, South Carolina, is a vital earth dam that serves the primary purpose of flood risk reduction along the TR-Kinley Creek. Completed in 1983, this structure stands at a height of 32 feet and spans 425 feet in length, with a NID storage capacity of 360 acre-feet. Despite having a fair condition assessment in 2020, it poses a high hazard potential, making regular inspections essential to ensure its continued safety and effectiveness.
Owned by the local government, Harbison Structure 9 is regulated by the South Carolina Department of Health and Environmental Control (DHEC) with state permitting, inspection, and enforcement in place. The dam's normal storage capacity of 77 acre-feet and surface area of 15 acres also support recreation activities in addition to flood risk reduction. Furthermore, the dam's stone core and soil foundation contribute to its structural integrity, emphasizing the importance of ongoing maintenance to mitigate any potential risks associated with its age and hazard potential.
With Joe Wilson (R) representing the area in Congress, stakeholders and enthusiasts interested in water resources and climate change in the region should closely monitor the condition and management of Harbison Structure 9. As a key component of the Savannah District's flood control infrastructure, this dam plays a crucial role in protecting the surrounding communities from potential flooding events. As efforts continue to ensure its safety and functionality, the collaboration between local and state agencies will be essential in safeguarding both the dam and the environment it serves.
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 Harbison Structure 9 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Saluda River Below Lk Murray Dam Nr Columbia | 2,400 cfs | → |
| Saluda River Near Columbia | 2,620 cfs | → |
| Smith Branch At North Main St At Columbia | 2 cfs | → |
| Congaree River At Columbia | 9,260 cfs | → |
| Gills Creek At Columbia | 44 cfs | → |
| Broad River At Alston | 4,010 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Harbison Structure 9.
Boat launches
- Highway 6 6, Columbia
- Cove Launch Court Lexington County
- Shull Island Boat Ramp
- Eastshore Drive 143, Lexington County
- Cabana Way Lexington County
- Sandlapper Way 159, Lexington County
Campgrounds
- Woodmen Of The World Park
- Dreher Island State Rec Area
- Sesquicentennial State Park
- Weston Lake Military - Fort Jackson
- Longleaf Campground
- Camp Longridge
Fishing spots
Track Harbison Structure 9 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 Harbison Structure 9
Where does the data for Harbison Structure 9 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 Harbison Structure 9.