How many workers are required at a minimum for a Class A surface mine?

In the context of mining operations, Class A surface mines are typically characterized by their extensive scale, complexity, and safety regulations. According to industry standards and regulations, a minimum of 250 workers is often mandated to ensure adequate staffing for various roles, including operations, maintenance, safety, and supervision. This workforce size is important not only for efficient production and operation but also for maintaining safety protocols and addressing emergencies that may arise in a large mine setting.

Having a minimum of 250 workers allows for better distribution of responsibilities, compliance with safety regulations, and the ability to conduct effective training and response drills. Additionally, a larger workforce means that there are more personnel available to handle tasks in tougher working conditions, reducing fatigue and the risk of accidents. The other options reflect numbers that fall below this industry standard, which could compromise both operational capacity and worker safety.