Snorkeler surveys the Potomac River bottom

Photo By/Credit

Westcott, Phillip

Date Shot/Created
07/16/2009
Media Usage Rights/License
Public Domain
Image
Periodic surveys of the Potomac River bottom are conducted in order to assess the health of the river.
Partner(s)
U.S. Geological Survey
Subject tags
Surveying
Snorkeling
Rivers and streams