Arizona Revised Statute §27-318 states: Every mine operator or former mine operator or claimant who owns a mine or mining claim or possess a mine or mining claim under lease, contract, permit or otherwise, who knowingly permits the existence on the premises of an abandoned or inactive mining shaft, portal, pit or other excavation which is dangerous to persons legally on the premises, who fails to cover, fence, fill or otherwise secure it and post warning signs, within sixty days of notification by the inspector and who fails to keep it so protected is guilty of a class 2 misdemeanor. This means that anyone owning a mine must keep it fenced and have warning signs posted. There are no requirements for the type of fence or sign but the following are recommendations based on the standard used in Nevada.

