David Mine Equalization Pond No 3 is an earth dam located in Armstrong County, Pennsylvania. It carries a Significant hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 145 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About David Mine Equalization Pond No 3
David Mine Equalization Pond No 3 is a dam in Armstrong, Pennsylvania. The dam is owned by Canterbury Coal Company (private). It impounds the Tr Long Run.
The dam stands 21 feet tall and stretches 145 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 8 acre-feet, and collects water from a drainage area of 1 square miles.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 03/29/2017.
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Location
| State | Pennsylvania |
| County | Armstrong |
| River/Stream | Tr Long Run |
| Coordinates | 40.56833, -79.45778 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 145 ft |
Storage & Hydraulics
| NID Storage | 8 acre-ft |
| Max Storage | 8 acre-ft |
| Normal Storage | 6 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Canterbury Coal Company |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 03/29/2017 |
| Emergency Action Plan | No |
Identifiers
| NID ID | PA01412 |
| Federal ID | PA01412 |
| More Info | State Dam Safety Program |