15,000 years ago Redmond, WA was buried under 3,000 feet of ice. Today, we occasionally find large boulders, glacial erratics, left in the wake of the retreating ice. For the new Redmond Central Connector, we built our own Erratic. We salvaged 3,000 steel plates from the BNSF Railroad that once crossed our site. These form the cladding for the Erratic’s skin.