I wonder what the frac out recovery plans were on a bore like that?

Here in Manitoba you have to be ready with Suction trucks or other means to recover immediately any drilling mud that escapes into a waterway from a boring fracture.

Last week by my place there was a contractor doing a bore under a river for a large water main and there were the suction tucks on each side of the river bank and a barge with containment booms standing by.