The low water level made visible a dam 100 yards wide that crosses the river near the Fair Lawn Avenue bridge, a structure thought to be a fishing weir built by native people before the arrival of European colonists.
The V-shaped structure was used to channel fish through a narrow opening, making them easier to catch.
CLICK HERE for a video about the historic site.
Click here to follow Daily Voice Fair Lawn-Glen Rock and receive free news updates.