Upper Swm Pond @ Mountain Run dam
Upper Swm Pond @ Mountain Run
Upper Swm Pond @ Mountain Run is a privately owned dam located in Hanover, Virginia, designed for flood risk reduction along Neds Creek. The dam is classified as an Earth dam with a height of 25 feet and a length of 640 feet, providing a storage capacity of 169 acre-feet. The dam has a surface area of 13.4 acres and drains a watershed area of 0.62 square miles.
Despite its low hazard potential, Upper Swm Pond @ Mountain Run is regularly inspected and maintained to ensure its structural integrity and safety. The last inspection in April 2018 found the dam to be in satisfactory condition, meeting all regulatory guidelines set by the Department of Conservation and Recreation. The dam's Emergency Action Plan (EAP) was last revised in September 2006, showing a commitment to preparedness and risk management.
Water resource and climate enthusiasts will appreciate the essential role that Upper Swm Pond @ Mountain Run plays in mitigating flood risks in the region and its adherence to state regulatory standards. The dam serves as a vital infrastructure for protecting against potential flooding events and showcases the importance of proper maintenance and monitoring to ensure the safety of surrounding communities and the 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 Upper Swm Pond @ Mountain Run -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| South Anna River Near Ashland | 34 cfs | → |
| Little River Near Doswell | 8 cfs | → |
| North Anna River At Hart Corner Near Doswell | 55 cfs | → |
| James River And Kanawha Canal Near Richmond | 137 cfs | → |
| James River Near Richmond | 1,230 cfs | → |
| Pamunkey River Near Hanover | 86 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Upper Swm Pond @ Mountain Run.
Boat launches
- Mountain Road Hanover County
- Watkins Landing Road 3099, Powhatan County
- Riverside Drive Richmond
- Bateau Landing Road 4399, Powhatan County
- Powhatan State Park Road Powhatan County
- Ancarrow's Landing
Track Upper Swm Pond @ Mountain Run 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 Upper Swm Pond @ Mountain Run
Where does the data for Upper Swm Pond @ Mountain Run 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 Upper Swm Pond @ Mountain Run.