Lower Swm Pond @ Mountain Run dam
Lower Swm Pond @ Mountain Run
Lower Swm Pond @ Mountain Run in Hanover, Virginia, is a privately owned water resource managed by the Department of Conservation and Recreation. This earth dam structure on Neds Creek serves the primary purpose of flood risk reduction, with a storage capacity of 108.7 acre-feet and a surface area of 6.1 acres. The dam stands at 37 feet high with a length of 380 feet, providing essential protection for the surrounding area.
Despite being classified as having an undetermined hazard potential and not rated for condition assessment, Lower Swm Pond @ Mountain Run plays a crucial role in managing water flow and reducing flood risks in the region. The emergency action plan for the dam was last revised in 2006, highlighting the importance of preparedness and safety measures. With a drainage area of 0.74 square miles, this water resource serves as a vital component of the local ecosystem and contributes to the overall water management efforts in the area.
Enthusiasts of water resources and climate will appreciate the strategic placement and design of Lower Swm Pond @ Mountain Run, which demonstrates the collaboration between private ownership and state regulatory agencies for effective water management. As climate change continues to impact the frequency and intensity of floods, structures like this earth dam play a critical role in safeguarding communities and infrastructure against potential disasters. By staying informed and actively involved in monitoring and maintaining such water resources, enthusiasts can contribute to the resilience and sustainability of their local 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 Lower 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 Lower 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
- River Trail Powhatan County
Track Lower 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 Lower Swm Pond @ Mountain Run
Where does the data for Lower 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 Undetermined 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 Lower Swm Pond @ Mountain Run.