This is a long shot, but maybe somebody can help.

On a construction contract translated from Romanian, there is a charge for "squirrel drilling."

We need to explain it.

What I think it probably is is some kind of directional drilling direct bore - this involves installation of some water line.

But I can't figure out what could get translated as squirrel. Or, mistranslated as squirrel. I don't have the original document, just the translation.