Cornwall Tailings dam
Cornwall Tailings
Cornwall Tailings, located in Cornwall Borough, Pennsylvania, is a rockfill dam completed in 1961 with a height of 200 feet and a length of 3800 feet. This structure serves the primary purpose of managing tailings, with a storage capacity of 3880 acre-feet and a surface area of 60 acres. The dam is regulated by the Pennsylvania Department of Environmental Protection and is subject to regular inspections to ensure its safety and compliance with state regulations.
The Cornwall Tailings dam poses a high hazard potential due to its size and location near Berhard Creek. Despite this, it currently has a fair condition assessment, indicating that it is being maintained adequately. The last inspection was conducted in March 2021, with a recommended frequency of once per year. While there are no emergency action plans or risk assessment reports available for the dam, it is reassuring to note that it meets state permitting, inspection, and enforcement requirements.
Enthusiasts of water resources and climate will find Cornwall Tailings to be an intriguing case study in tailings management and dam safety. The combination of its historical significance, large storage capacity, and high hazard potential make it a noteworthy structure in Lebanon County, Pennsylvania. As climate change continues to impact water resources, understanding the infrastructure and regulations surrounding dams like Cornwall Tailings becomes increasingly vital for ensuring the safety and sustainability of our water supply.
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 Cornwall Tailings -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Quittapahilla Creek Near Bellegrove | 93 cfs | → |
| Conewago Creek Near Bellaire | 10 cfs | → |
| Swatara Creek At Harper Tavern | 197 cfs | → |
| Tulpehocken Creek Near Bernville | 73 cfs | → |
| Swatara Creek Near Hershey | 351 cfs | → |
| Swatara Creek Near Inwood | 143 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Cornwall Tailings.
Track Cornwall Tailings 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 Cornwall Tailings
Where does the data for Cornwall Tailings 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 Cornwall Tailings.