| Specimen ID | 117709 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | WI |
| County | Polk |
| Locality | St. Croix River 2 miles north of St. Croix Falls, WI (just upstream of a Northern States Power hydroelectric dam) |
| Mapping Accuracy | Accurate |
| HUC8 Name | Lower St. Croix |
| HUC8 Number | 07030005 |
| HUC10 Name | Wolf Creek-Saint Croix River |
| HUC10 Number | 0703000506 |
| HUC12 Name | Big Rock Creek-Saint Croix River |
| HUC12 Number | 070300050605 |
| Map | |
| Collection Day | 12 |
| Collection Month | 7 |
| Collection Year | 1997 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Comments | This sighting is upstream from a bed of the endangered Winged Mapleleaf unionid. |
| Record Type | Personal communication |
| Disposal | "USGS-BRD, Ann Arbor" |
| Verifier | Diane Waller, USGS-BRD, Ann Arbor, MI |
| Freshwater/Marine | Freshwater |
| Number Collected | 40-50 |
| Year Class | adult |
