If the river was dammed all the way, it'd overflow that stone breakwater and flood the whole plantation.
7 seconds sound clip from the Leiningen Versus the Ants (1948) classic radio play.
You can hear this line at 00:21:55 in the radio play.
Quote context
[...]
- We've got enough to fill the ditch once more.
- But isn't there any way? Any way at all? We've got to do something!
- Yes, I know, I know. There must be a way. There must be...
- We'll flood the whole plantation.
- The river's higher than any point except this high ground we're on.
- We've got to close the floodgate at the dam - that'll do it!
- You're mad! The dam is more than a mile away! More than a mile of away!
- Lads! Listen to me! Listen, lads! I'm proud of you!
[...]