| Specimen ID | 116218 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | IL |
| County | Massac |
| Locality | Ohio River (R.M. 945), near Brookport, Illinois |
| Mapping Accuracy | Accurate |
| HUC8 Name | Lower Ohio |
| HUC8 Number | 05140206 |
| HUC10 Name | Mud Creek-Ohio River |
| HUC10 Number | 0514020601 |
| HUC12 Name | Mud Creek-Ohio River |
| HUC12 Number | 051402060102 |
| Map | |
| Collection Month | 10 |
| Collection Year | 1991 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Comments | Original document reported the location as R.M. 745, but is actually R.M. 945. |
| Record Type | Personal communication |
| Verifier | U.S. Army Corps of Engineers |
| Freshwater/Marine | Freshwater |
| Number Collected | 3 |
| Year Class | adult |
