| Specimen ID | 117123 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | PA |
| County | Westmoreland |
| Locality | Allegheny River (R.M. 24.2) at Lock 4 near Natrona, PA |
| Mapping Accuracy | Accurate |
| HUC8 Name | Lower Allegheny |
| HUC8 Number | 05010009 |
| HUC10 Name | Allegheny River |
| HUC10 Number | 0501000903 |
| HUC12 Name | Chartiers Run-Allegheny River |
| HUC12 Number | 050100090304 |
| Map | |
| Collection Day | 27 |
| Collection Month | 10 |
| Collection Year | 1994 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Record Type | Personal communication |
| Verifier | Linda Stafford, biologist, USACOE, Pittsburgh, PA |
| Freshwater/Marine | Freshwater |
| Number Collected | 2 |
| Year Class | adult |
| Size | 26 - 30 mm |
