117. When actionable and when justifiable.

Where a person does some act which he is lawfully entitled to do on his own land it will constitute a nuisance if it causes physical damage to his neighbour's property, unless there is justification. Possible justifications are that the damage is a natural result of a reasonable use by a person of his own property1, or that the act was done under statutory authority and that every reasonable precaution was taken to prevent it causing damage2, or that the act was done under agreement, expressed or implied, between the doer and the person affected3, or that the damage