Where they put the dirt from NY subway?

The dirt excavated during New York City subway construction is typically called "spoil." This material is often transported to designated disposal sites, such as landfills or construction sites, where it can be reused for fill or other purposes. In some cases, it may also be used in parks or landscaping projects. Additionally, in recent years, efforts have been made to recycle or repurpose the excavated material to reduce waste.