### Question
How is the term estuary defined?


### Answer
The term **estuary** is defined in *16 U.S.C. § 1453* as the following:

> that part of a river or stream or other body of water having unimpaired connection with the open sea, where the sea water is measurably diluted with fresh water derived from land drainage

#### Citation:
  - *16 U.S.C. § 1453*
  - Heading: **CHAPTER 33-COASTAL ZONE MANAGEMENT**

