[billfruit]

From the article :

"Czech conservation authorities praised the beavers for their unexpected yet effective environmental work. Bohumil Fišer, head of the Brdy Protected Landscape Area, stated that the beavers "built the dams without any project documentation and for free", and achieved the desired ecological outcomes "practically overnight"."

[AnimalMuppet]

No project documentation? Expect that it's going to be a headache to maintain if you can't get the original creators to stay on...