Twin Lakes Dam # 1 dam
Twin Lakes Dam # 1
Twin Lakes Dam # 1, also known as Top Lake or Lake Greene, is a private dam located in Greene, Virginia. Managed by the Department of Conservation and Recreation, this dam is regulated and inspected by the state to ensure its safety and compliance with regulations. With a primary purpose of recreation, this earth dam stands at a height of 32 feet and has a length of 500 feet, creating a reservoir with a storage capacity of 460 acre-feet.
Situated on Deep Run, Twin Lakes Dam # 1 offers a surface area of 6 acres and drains an area of 1.72 square miles. Despite being rated as having a high hazard potential, the dam's condition assessment has not been rated, with the last inspection conducted in June 2016. While the dam's emergency action plan status is unclear, it is essential for the dam's owners to ensure that it meets guidelines and has updated emergency contacts in case of any potential risks or incidents.
With its picturesque location and recreational opportunities, Twin Lakes Dam # 1 serves as a vital water resource in Greene, Virginia. Enthusiasts of water resources and climate will appreciate the importance of maintaining and monitoring the safety of this dam to ensure the protection of the surrounding area and its inhabitants. As climate change continues to impact water resources, the proper management and maintenance of dams like Twin Lakes Dam # 1 are crucial for the resilience of communities and ecosystems in the face of changing environmental conditions.
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 Twin Lakes Dam # 1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Rapidan River Near Ruckersville | 56 cfs | → |
| N F Rivanna River Near Earlysville | 8 cfs | → |
| Moormans River Near Free Union | 3 cfs | → |
| Mechums River Near White Hall | 8 cfs | → |
| S F Shenandoah River Near Lynnwood | 235 cfs | → |
| Robinson River Near Locust Dale | 26 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Twin Lakes Dam # 1.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Twin Lakes Dam # 1
Where does the data for Twin Lakes Dam # 1 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 High 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.