| Specimen ID | 117509 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | PA |
| County | Washington |
| Locality | Monongahela River (R.M. 41.5) at Lock 4 near Monesson, PA |
| Mapping Accuracy | Accurate |
| HUC8 Name | Lower Monongahela |
| HUC8 Number | 05020005 |
| HUC10 Name | Lower Monongahela River |
| HUC10 Number | 0502000508 |
| HUC12 Name | Maple Creek-Monongahela River |
| HUC12 Number | 050200050803 |
| Map | |
| Collection Day | 25 |
| Collection Month | 6 |
| Collection Year | 1996 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Record Type | Personal communication |
| Disposal | USACOE-Conemaugh Office |
| Verifier | Linda Stafford, biologist, USACOE-Pittsburgh Distr |
| Freshwater/Marine | Freshwater |
| Number Collected | 13 |
| Year Class | adult |
| Size | 12 - 34 mm |
