Who must the EIC contact when welding will be performed on a frog or switch point on controlled track?

The correct choice is to contact the train dispatcher when welding is performed on a frog or switch point on controlled track. The train dispatcher plays a critical role in ensuring the safety and efficiency of train operations. They are responsible for managing train movements within a designated area, and their notifications are essential when any work, especially activities like welding that could impact rail operations, is being performed.

When welding on critical infrastructure like a frog or switch point, which are vital components that facilitate smooth train transitions between tracks, it is imperative that the train dispatcher is informed. This allows the dispatcher to implement necessary safety measures, such as rerouting trains, setting up work zones, or halting train movements to reduce the risk of accidents or injuries during the welding process. Communication with the train dispatcher ensures that there is a clear understanding of the operational status and any potential hazards that may arise from maintenance work being carried out.