Mcnairs Millpond Dam dam
Mcnairs Millpond Dam
Mcnairs Millpond Dam, located in Marlboro, South Carolina, is a historic structure completed in 1875 with a primary purpose of recreation. This Earth dam, with a buttress core type, stands at a height of 17 feet and has a length of 570 feet, creating a surface area of 75 acres on Beaverdam Creek. The dam has a storage capacity of 670 acre-feet and a normal storage level of 258 acre-feet.
Despite its age and historical significance, Mcnairs Millpond Dam has been classified as having a high hazard potential and an unsatisfactory condition assessment. The dam is under the regulatory oversight of the South Carolina Department of Health and Environmental Control (SC DHEC) and undergoes inspections every two years. With a very high risk rating, the dam poses significant challenges for risk management and emergency preparedness, highlighting the importance of ongoing monitoring and maintenance efforts to ensure the safety of the surrounding community and water resources.
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 Mcnairs Millpond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Shoe Heel Creek Nr Laurinburg | 16 cfs | → |
| Pee Dee River Nr Bennettsville | 2,080 cfs | → |
| Lumber River Near Maxton | 96 cfs | → |
| Pee Dee R Nr Rockingham | 1,880 cfs | → |
| Drowning Creek Near Hoffman | 18 cfs | → |
| Rockfish Creek At Raeford | 31 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mcnairs Millpond Dam.
Boat launches
- West Us 74 Highway 1333, Rockingham
- State Road 1759, Lilesville
- Darlington County
- Lester Road Dillon County
Campgrounds
- Cheraw State Park
- Chalk Banks - Lumber River State Park
- Bass Lake Campground
- H. Cooper Black
- John Culberth Campsite
- Little Pee Dee State Park
Fishing spots
- Baldwins Pond
- Broadacres Lake
- Broadacres Lakes
- Big Branch
- Blewett Falls Lake Grassy Island
- Aberdeen Town Lake
Paddle runs
Track Mcnairs Millpond 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 Mcnairs Millpond Dam
Where does the data for Mcnairs Millpond 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 Mcnairs Millpond Dam.