| Specimen ID | 255540 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | rostriformis |
| Subspecies | bugensis |
| Common Name | quagga mussel |
| State | CO |
| County | Grand |
| Locality | Willow Creek Reservoir on Willow Creek [~60 mi NW of Denver] |
| Mapping Accuracy | Accurate |
| HUC8 Name | Colorado Headwaters |
| HUC8 Number | 14010001 |
| HUC10 Name | Willow Creek |
| HUC10 Number | 1401000101 |
| HUC12 Name | Lower Willow Creek |
| HUC12 Number | 140100010104 |
| Map | |
| Collection Day | 26 |
| Collection Month | 9 |
| Collection Year | 2008 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | failed |
| Reference 1 |
| Ref. Number: | 32420 |
| Author: | Colorado Parks and Wildlife. |
| Date: | 2019 |
| Title: | State Aquatic Nuisance Species (ANS) Program, Summary for Colorado Legislators per SB 08-226 |
| Publisher: | Colorado Parks and Wildlife |
| Pages: | 11 pp. |
|
|
| Comments | Confirmed by lab tests. Delisted as "infested" in 2014 after 5 years of negative sampling. |
| Record Type | Personal communication |
| Freshwater/Marine | Freshwater |
| Number Collected | 1 |
| Year Class | veliger |
