it is a wall kind of thing that blocks the water from going to the other side.
Building dams is a threat to fish because it takes away from their habitat and breeding grounds. Dams may also hinder their ability to migrate.
Architects.
building houses or dams
beaver
dams
Building dams
they route it differently
Dams disrupt a river's ecosystem.
the govt.
yea how to biuld
flooding
The Chinese have built dams to prevent flooding.