I do know from direct experience that a crane swing easement can be negotiated with the neighbours in question in order to permit that encroachment. As the encroachee rather than the encroacher, so to speak, I do not know what if any insurance is taken out. IIRC, the easement did include a clause about making good any damage. As I recall, there was a similar statement with respect to some of the horizontal drilling which takes place during the shoring process in excavation. This was all a few years ago, however, and my memory may be faulty as to details.