Green Hill Lake Dam dam
Green Hill Lake Dam
Green Hill Lake Dam, located in Mount Airy, North Carolina, is a privately-owned structure that serves primarily for recreation. Completed in 1955, this earth dam stands at a hydraulic height of 36 feet and a structural height of 42 feet, with a length of 680 feet. The dam has a maximum storage capacity of 242 acre-feet, providing a surface area of 11 acres and serving a drainage area of 385 acres.
Despite being regulated by the North Carolina Dam Safety Program and subject to regular inspections, the dam is classified as having a high hazard potential. However, its condition assessment as of December 2020 was deemed fair. The dam's emergency action plan status and risk assessment measures were not provided in the data. The surrounding Lovills Creek-Tr river/stream system and its associated structures are not impacted by the dam, which is situated within the jurisdiction of the state and subject to state permitting, inspection, and enforcement.
Water resource and climate enthusiasts interested in Green Hill Lake Dam will find its historical significance and recreational purpose intriguing. The dam's location in the heart of Surry County, North Carolina, provides opportunities for outdoor activities and water-based recreation. Its capacity to store and regulate water flow in the Lovills Creek-Tr watershed, while under state regulation and inspection, highlights the importance of proper dam management and safety measures in mitigating potential risks to the surrounding community and 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 Green Hill Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ararat River At Ararat | 110 cfs | → |
| Fisher River Near Copeland | 177 cfs | → |
| Chestnut Creek At Galax | 23 cfs | → |
| Dan River Near Francisco | 59 cfs | → |
| Mitchell River Near State Road | 57 cfs | → |
| New River Near Galax | 525 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Green Hill Lake Dam.
Boat launches
- Pattons Mill Lane 1434, Grayson County
- New River Trail Carroll County
- Riverside Boat Ramp
- Baywood Boat Ramp
- Ivanhoe Boat Launch
- Va 100 Wythe County
Campgrounds
- Camp Raven Knob
- Willville Motorcycle Campground
- Pilot Mountain State Park
- Cliffview Campground
- Ymca Camp Hanes
- Hanging Rock State Park
Fishing spots
Track Green Hill Lake 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 Green Hill Lake Dam
Where does the data for Green Hill Lake 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 Green Hill Lake Dam.