Electrical equipment in hazardous areas the participation of operations, maintenance, safety, electrical and instrumentation professionals, the use of process diagrams and material flows, MSDS and any pertinent documents, information and knowledge to determine the hazards and their extent and the countermeasures to be employed. Area classification documentations are reviewed and updated to reflect process changes. Soon after the introduction of electric power into coal mines, it was discovered that lethal explosions could be initiated by electrical equipment such as lighting, signals, or motors. The hazard of fire damp or methane accumulation in mines was well known by the time electricity was introduced, along with the
Dagus Mines, Pennsylvania then served as an apartment building until December 2016 when it was destroyed by fire and razed. Dagus Mines also featured a hotel and union hall. "Where the Fox Township Medical Center is located today, the Dagus Mines Union Hall once stood. Besides union meetings, medicine shows often appeared there. Across the street from the union hall was the Hau Hotel." Dagus Mines, Pennsylvania Dagus Mines is an unincorporated community and coal town located in Elk County, Pennsylvania. Their post office opened in 1880. Dagus Mines was built by the Northwestern and Mine Exchange Company for its many workers. The