Specimen Information

Dreissena rostriformis bugensis
Dreissena rostriformis bugensis
(quagga mussel)

Specimen ID1421483
Common Namequagga mussel
CountyLos Angeles
LocalitySan Gabriel River, (upper) below Morris Dam
Mapping AccuracyAccurate
HUC8 NameSan Gabriel
HUC8 Number18070106
HUC12 Number180701060601
Collection Day26
Collection Month10
Collection Year2017
Year AccuracyActual
Potential Pathwayhitch hiker on small watercraft
CommentsQuagga 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 TypeNAS sighting report
VerifierMetropolitan Water District of Southern California


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2021]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [9/23/2021].

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