Typhoon Morakot was the deadliest typhoon to impact Taiwan in recorded history during August 7-10, 2009. This typhoon wrought catastrophic damage in Taiwan, leaving 461 people dead and 192 others missing, most of whom are feared dead and roughly NT$ 110 billion ($3.3 billion USD) in damages. The storm produced copious amounts of rainfall, peaking at 2,777 mm (109.3 in). The extreme amount of rain triggered enormous mudslides and severe flooding throughout southern Taiwan. There are 114 bridges were destroyed or partially damaged by the debris flow and flood from the mountain area. The China Engineering Consultants, Inc. (CECI) formed 6 teams to investigate these bridges within 14 days (August 21 to Sept. 2) under the supports by government agencies and societies of professional engineers. A detail investigation of the causes of a collapsed bridge by nondestructive methods and computational techniques is conducted. This paper presents the damages to the bridges caused by the typhoon. Based on the investigation of 120 damaged bridges, the findings and lessons are summarized.