Photo By/Credit
USFWS
Date Shot/Created
10/01/1969Media Usage Rights/License
Public Domain
Image
Aerial view of overlay construction.
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.