by 2020, primarily as a result of increasing population pressures. The confidence levels for the 
assessment of the eutrophic conditions in the Oregon region were low due to paucity of data 
(Bricker et ah, 1999). 
Table 1.1 Designated uses and water quality attainments for Yaquina Estuary/River. (Source: 
U.S. EPA National Assessment Database, 305(b) Lists/Assessment Unit Information Year 
2002; http://www.epa.gov/waters/305b/index.html) 
Rivermile 
State Designated 
Use 
Attainment 
Status 
Threatened 
Basis of Impairment 
Classification 
0-6.3 
Shellfish Growing 
Not Supporting 
No 
Fecal Coliform 
5.1-15.4 
Shellfish Growing 
Not Supporting 
No 
Fecal Coliform 
6.3-14.2 
Shellfish Growing 
Fully Supporting 
No 
NA 
15.4-27.6 
Resident Fish and 
Aquatic Life 
Fully Supporting 
No 
NA 
Salmonid Fish 
Spawning 
Water Contact 
Recreation 
Salmonid Fish 
Rearing 
Not Supporting 
No 
Thermal Modifications 
Anadromous Fish 
Passage 
27.6-42 
Resident Fish and 
Aquatic Life 
Partial 
Supporting 
No 
Biologic Integrity 1 
27.6-57.5 
Aesthetics 
Fully Supporting 
No 
NA 
Fishing 
Livestock Watering 
Resident Fish and 
Aquatic Life 
Water Contact 
Recreation 
Water Supply 
Salmonid Fish 
Rearing 
Not Supporting 
No 
Organic 
Enrichment/Low 
Dissolved Oxygen 
Salmonid Fish 
Spawning 
Anadromous Fish 
Passage 
'Aquatic communities (primarily macroinvertebrates) which are <60% of the expected 
reference community for multimetric and multivariate model scores are considered impaired. 
3 
