Number 1 Impoundment dam
Number 1 Impoundment
Number 1 Impoundment in Hanover, Virginia, is a significant water resource managed by the Mine Safety and Health Administration for an unspecified purpose. This earth dam structure stands at a height of 10 feet and stretches for 780 feet, with a storage capacity of 173.28 acre-feet and a surface area of 21.66 acres. Located in the Norfolk District, this impoundment plays a crucial role in water management in the region, although its hazard potential and condition assessment remain undetermined and not rated, respectively.
Despite lacking specific details on its primary purpose and dam type, Number 1 Impoundment serves as an essential water storage facility in Hanover, Virginia. With no state jurisdiction or regulatory agency overseeing its operations, the dam's last inspection date and condition assessment are currently unknown. While the dam's emergency action plan status and risk assessment are also undetermined, its significance in managing water resources in the area cannot be understated, making it a focal point for water resource and climate enthusiasts interested in the region's hydrological landscape.
As water resource and climate enthusiasts delve into the intricacies of Number 1 Impoundment, they can explore its structural dimensions, storage capacity, and role in water management within Hanover, Virginia. While the dam's hazard potential and condition assessment are yet to be determined, its presence as a vital water infrastructure underscores the importance of sustainable water resource management in the region. With its proximity to the Norfolk District and under the purview of the Mine Safety and Health Administration, this impoundment offers a fascinating case study of water resource management practices in Virginia.
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 Number 1 Impoundment -- 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 | → |
| Fine Creek At Fine Creek Mills | 2 cfs | → |
| James River And Kanawha Canal Near Richmond | 137 cfs | → |
| North Anna River At Hart Corner Near Doswell | 55 cfs | → |
| James River Near Richmond | 1,230 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Number 1 Impoundment.
Boat launches
- Mountain Road Hanover County
- Watkins Landing Road 3099, Powhatan County
- Bateau Landing Road 4399, Powhatan County
- Powhatan State Park Road Powhatan County
- River Trail Powhatan County
- River Launch Road Powhatan County
Track Number 1 Impoundment 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 Number 1 Impoundment
Where does the data for Number 1 Impoundment 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 Number 1 Impoundment.