Lewellyn Amd Impoundment dam
Lewellyn Amd Impoundment
Lewellyn Amd Impoundment, located in Mannington, West Virginia, is a privately owned water resource structure with a primary purpose classified as 'Other'. This earth dam stands at an impressive height of 122 feet and spans a length of 535 feet, providing a storage capacity of 620 acre-feet. Despite being under the jurisdiction of the Mine Safety and Health Administration, the impoundment is not regulated by the state, nor subject to state permitting or inspection.
With a hazard potential rated as 'High', the condition assessment of Lewellyn Amd Impoundment is currently marked as 'Not Available'. The emergency action plan status and risk assessment measures are also not documented. The structure holds significant importance for water resource and climate enthusiasts due to its strategic location in Marion County and its potential impact on the surrounding environment. An in-depth analysis of this impoundment's risk management and emergency preparedness measures would provide valuable insights for stakeholders in the region.
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 Lewellyn Amd Impoundment -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Buffalo Creek At Barrackville | 73 cfs | → |
| West Fork River At Enterprise | 197 cfs | → |
| Tygart Valley River At Colfax | 741 cfs | → |
| Deckers Creek At Morgantown | 48 cfs | → |
| West Fork River Near Mount Clare | 271 cfs | → |
| Dunkard Creek At Shannopin | 76 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lewellyn Amd Impoundment.
Boat launches
- Mon River Trail South Marion County
- Caperton Trail 371, Star City
- Mon River Trail North Monongalia County
- Point Marion
- New Geneva
- Glassworks
Campgrounds
- Mason - Dixon Historical Park
- Tygart Lake State Park
- Coopers Rock State Forest
- Chestnut Ridge Regional Park
Fishing spots
- Bruceton Mills Public Fishing Area
- Snowy Creek
- Belmot Lake
- Belmont Lake
- Deep Creek Lake
- Barnesville Reservoir Number Three
Paddle runs
- Route 33/8 To Jobs Run Near Porterwood
- Begins As River Passes Under The Herrington Manor Road Bridge At Oakland, Maryland To The Corporate Boundary Of Friendsville, Maryland
- Otter Creek To Blackwater
- North Fork To Hickory Lick Run
- Enter Otter Creek Wilderness To Exit Otter Creek Wilderness
- Glady Fork River To Otter Creek
Track Lewellyn Amd 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 Lewellyn Amd Impoundment
Where does the data for Lewellyn Amd 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 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 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 Lewellyn Amd Impoundment.