Patterson Creek No.21 dam
Patterson Creek No.21
Patterson Creek No.21, also known as Mill Creek, is a vital structure owned by the local government in Mineral County, West Virginia. Designed by the USDA NRCS, this dam plays a crucial role in flood risk reduction and is regulated by the West Virginia Department of Environmental Protection (DWWM). Completed in 1984, this earth dam stands at a height of 74 feet with a hydraulic height of 64 feet, providing storage of up to 2,549 acre-feet and covering a surface area of 23 acres.
With a high hazard potential but a satisfactory condition assessment, Patterson Creek No.21 is monitored and inspected regularly to ensure its integrity and safety. The dam has uncontrolled spillways and outlet gates, with the last inspection conducted in April 2014. Despite its moderate risk assessment, the structure has not been modified in recent years and does not fall under the jurisdiction of the US Army Corps of Engineers. As a key element in managing water resources in the area, Patterson Creek No.21 continues to serve its primary purpose of mitigating flood risks 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 Patterson Creek No.21 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| North Branch Potomac River At Barnum | 2,780 cfs | → |
| Abram Creek At Oakmont | 236 cfs | → |
| North Branch Potomac River At Luke | 3,810 cfs | → |
| North Branch Potomac River At Kitzmiller | 1,210 cfs | → |
| Georges Creek At Franklin | 244 cfs | → |
| Patterson Creek Near Headsville | 472 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Patterson Creek No.21.
Boat launches
- Mount Zion Road Garrett County
- Springfield Pike Hampshire County
- Chesapeake And Ohio Canal Trail Allegany County
- Blue Trail Garrett County
- Kimsey Run Road Hardy County
Campgrounds
- Robert W. Craig Memorial Campground
- Robert W. Craig - Jennings Randolph Lake
- Abram’S Creek Retreat & Campground
- Wallman/Laurel Run - Potomac State Forest
- Lost Land Run - Potomac State Forest
- Big Run State Park
Fishing spots
- Savage River Reservoir
- Georges Creek
- Dans Mountain Pond
- Little Youghiogheny River Reservoir
- Broadford Lake
- North Branch Potomac River
Paddle runs
- Begins As River Passes Under The Herrington Manor Road Bridge At Oakland, Maryland To The Corporate Boundary Of Friendsville, Maryland
- Begins Where The Lost River Becomes The Cacapon River To Wardensville
- The West Virginia 259 Bridge South Of Wardensville To Ends Where The Lost River Becomes The Cacapon River
- Jake Hill Road Bridge To Shreve Store
- Wardensville To The Town Of Capon Bridge
- Perennial Stream At Forks To Dolly Sods Wilderness Boundary
Track Patterson Creek No.21 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 Patterson Creek No.21
Where does the data for Patterson Creek No.21 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 Patterson Creek No.21.