A quarry's a type of open-pit mine from which rock or minerals are extracted. Quarries are generally used for extracting building materials, such as dimension stone, construction aggregate, riprap, sand, and gravel. They're often colocated with concrete and asphalt plants due to the requirement for large amounts of aggregate in those materials. Problems Quarries in level areas with shallow groundwater or which are located close to surface water often have engineering problems with drainage. Gen… (More on Quarry)