| Specimen ID | 166835 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | IA |
| County | Delaware |
| Locality | Maquoketa River, at Lake Delhi, ~1 mi SW of Delhi [=Hartwick Lake] |
| Mapping Accuracy | Accurate |
| HUC8 Name | Maquoketa |
| HUC8 Number | 07060006 |
| HUC10 Name | Headwaters Maquoketa River |
| HUC10 Number | 0706000602 |
| HUC12 Name | Allison Creek-Maquoketa River |
| HUC12 Number | 070600060210 |
| Map | |
| Collection Day | 21 |
| Collection Month | 7 |
| Collection Year | 2006 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Comments | Several age classes were collected just above and below the reservoir dam. |
| Record Type | Personal communication |
| Freshwater/Marine | Freshwater |
