Mayo dam
Mayo
Mayo, a hydroelectric dam located in Mayodan, North Carolina, has been in operation since 1898 and serves as a critical source of water supply and hydroelectric power in the region. Managed by a private owner, Mayo stands as a gravity dam with a height of 14 feet and a maximum storage capacity of 85 acre-feet. With a drainage area of 320 square miles and a spillway width of 406 feet, Mayo has a low hazard potential and undergoes regular inspections by the Federal Energy Regulatory Commission to ensure its structural integrity and operational safety.
Despite its age, Mayo maintains a moderate risk assessment rating and meets regulatory guidelines for emergency preparedness. The dam's primary purpose is hydroelectric power generation, but it also serves as a water supply source for the surrounding area. With a structural height of 22 feet and a length of 590.5 feet, Mayo plays a vital role in managing water resources in Rockingham County, North Carolina. Its historical significance and ongoing importance in water management make Mayo a key asset for climate and water resource enthusiasts to study and appreciate.
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 Mayo -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Dan River Near Wentworth | 319 cfs | → |
| Mayo River Near Price | 101 cfs | → |
| Dan R At Pine Hall | 129 cfs | → |
| North Mayo River Near Spencer | 31 cfs | → |
| Smith River At Eden | 186 cfs | → |
| South Mayo River Near Nettleridge | 29 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mayo .
Boat launches
- Us Bus 220 Boat Access Stoneville
- Pine Hall Road 2547-2793, Walnut Cove
- Bethlehem Church Road 587, Eden
- Belews Lake Drive 8191, Belews Creek
- South Fieldcrest Road Draper Village
Campgrounds
- Sunset Park Campground
- Hanging Rock State Park
- Lake Reidsville Rec Park
- Ymca Camp Hanes
- Goose Point - Philpott Lake
- Salthouse Branch - Philpott Lake
Fishing spots
Track Mayo 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 Mayo
Where does the data for Mayo 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 Low 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 Mayo .