### Question
What does Lower Columbia River Estuary mean?


### Answer
**Lower Columbia River Estuary** has the following meaning in *33 U.S.C. § 1275*:

> the mainstem Columbia River from the Bonneville Dam to the Pacific Ocean and tidally influenced portions of tributaries to the Columbia River in that region

#### Citation:
  - *33 U.S.C. § 1275*
  - Heading: **CHAPTER 26-WATER POLLUTION PREVENTION AND CONTROL > SUBCHAPTER I-RESEARCH AND RELATED PROGRAMS**

