Greenwood Sediment Pond Dam
Greenwood Sediment Pond
Greenwood Sediment Pond, Basin 154 is a privately-owned Earth dam located in Bedford, Virginia, just 12 miles away from the City of Roanoke. Managed by the Mine Safety and Health Administration, this significant dam stands at a height of 30 feet and spans a length of 258 feet. While the specific purposes and storage capacities of the pond are not detailed, its hazard potential is classified as "significant," indicating the importance of proper maintenance and monitoring.
Despite not being regulated by the state, Greenwood Sediment Pond is subject to inspections by the Mine Safety and Health Administration, with the last recorded inspection dating back to December 2009. The condition assessment of the dam is currently listed as "Not Available," highlighting a potential need for updated evaluations and risk assessments in the future. Emergency action preparedness and risk management measures also appear to be lacking, suggesting a need for improved safety protocols and guidelines to mitigate potential hazards.
Overall, Greenwood Sediment Pond, Basin 154 presents an intriguing case study for water resource and climate enthusiasts, showcasing the complexities of dam management and the importance of regular inspections and maintenance. With its location in a congressional district in Virginia and under the oversight of a federal agency, there is a unique intersection of regulatory oversight and potential environmental risks that warrant further attention and monitoring in the future.
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 Greenwood Sediment Pond -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Goose Creek Near Huddleston | 40 cfs | → |
| Big Otter River Near Evington | 65 cfs | → |
| Big Otter River Near Bedford | 53 cfs | → |
| Roanoke River At Altavista | 529 cfs | → |
| Pigg River Near Sandy Level | 99 cfs | → |
| Back Creek Near Dundee | 19 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Greenwood Sediment Pond.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Greenwood Sediment Pond
Where does the data for Greenwood Sediment Pond 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 Significant 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 below 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.
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.