What must be ensured about the condition of highwall, pit area, and spoil bank?

Ensuring that the highwall, pit area, and spoil bank are free of overhanging materials is crucial for maintaining safety in surface mining operations. Overhanging materials can pose a significant risk of collapse, which could lead to serious accidents or injuries to workers. By keeping these areas clear of any loose or unstable materials, the risk of falling debris is minimized, creating a safer working environment for everyone involved in the operation.

Regular inspections and maintenance are necessary to identify and address any potential hazards, making it imperative to manage the condition of these areas effectively. Although the other options mention practices that can contribute to site safety and efficiency, such as regular cleaning or inspections, the specific focus on preventing overhanging hazards addresses an immediate risk that can have severe consequences if not properly managed.