No forest practices conducted on forest land or an appurtenance to it shall be or become a nuisance, private or public, by any changed conditions in or about the surrounding nonforest activities after the same has been in operation for more than one (1) year when the forest practice was not a nuisance at the time the forest practice began; provided, that the provisions of this section shall not apply whenever a nuisance results from the improper or negligent operation of any forest practice conducted on any forest land or appurtenance to it.
Idaho Code § 38-1403