Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.

Circa 1903. "Sands Street entrance, Brooklyn Navy Yard." With a flock of newsies, and Lewis Hine nowhere in sight. Detroit Publishing Co. View full size.
Updating my previous modern view (+101 below), here is the same view from April of 2011.

This is the same view from November of 2004. A portion of the wall and turret can be seen behind the truck.

Those weren't trolley tracks on Plymouth Street. They were from a very short line called the Jay Street Connecting Railroad. It switched freight cars between buildings and the piers.
This is now the entrance to a vehicle impound lot run by the NYPD. Sadly, the entrance buildings look just about ready to fall apart any day now.
The entrance structures still stand, albeit with fugly alterations:
And the newsies would be among those who dodged the trolleys in Brooklyn.