How Many Buses to Stop a River in BeamNG.drive?

How many buses does it take to stop a river? We keep adding buses to the river’s path to find out how many it takes to block the flow in BeamNG.drive.
About the game:
BeamNG.drive is a vehicle simulation game renowned for its realistic physics engine, enabling detailed vehicle dynamics and destruction. Players enjoy driving, crashing, and customizing vehicles in diverse environments.
Official game site: beamng.com
Official mods repository: beamng.com/res...