| Specimen ID | 1421483 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | bugensis |
| Common Name | quagga mussel |
| State | CA |
| County | Los Angeles |
| Locality | San Gabriel River, (upper) below Morris Dam |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Gabriel |
| HUC8 Number | 18070106 |
| HUC10 Number | 1807010606 |
| HUC12 Number | 180701060601 |
| Map | |
| Collection Day | 26 |
| Collection Month | 10 |
| Collection Year | 2017 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | unknown |
| Comments | Quagga mussel veligers from the Colorado River Aqueduct were released at this location for 12 days due to an unplanned operational issue. All of the flow was fully contained within the groundwater replenishment system and no waterbodies downstream, of this engineered facility were impacted. Monitoring of the multiple downstream locations has shown no veliger detections since the initial sightings on October 26 and 31, 2017. |
| Record Type | NAS sighting report |
| Verifier | Metropolitan Water District of Southern California |
| Freshwater/Marine | Freshwater |
