Years passed. London Bridge was repaired and rebuilt several times People no longer traveled horse-drawn carriages. They crossed the bridge in trucks and cars. In 1962, engineers discovered an alarming fact. London Bridge really was falling down. Heavy traffic had weakened the old bridge. Cracks were developing. The bridge was no longer safe Plans were made to build a new, modern bridge. What happened to the old London Bridge? An American named Robert McCulluch bought it He wanted to bring the bridge to his hometown. McCulluch lived in Lake Havasu City, Arizona. Workers took London Bridge apart, stone by stone. They numbered each stone. Then they shipped the stones to Arizona. Workers in Arizona studied the original plan for the bridge. They matched the numbers on each stone. Then they put the bridge back together again. When the bridge was built, they dug a channel under it. The channel filled with water London Bridge was back in business.