Cleaning quarry lorry tires at the dual purpose Thornton Quarries

摘要

The Thornton Quarry in Illinois (USA) is operated by the company Material Service Corporation (part of General Dynamics The quarry was originally formed as a Silurian coral reef more than 400m years ago and is among the largest commercial stone quarries in the world, starting operation in the 1830s. At one time the world's largest limestone quarry, this now serves a dual purpose as half of the site is to be used as a reservoir for the a sewer system during heavy Chicago region rain situations.