Seongsu Bridge

The Seongsu Bridge, sometimes spelled Sŏngsu Bridge, is a cantilever bridge over the Han River, connecting the Seongdong and Gangnam districts of Seoul, South Korea. The bridge began construction under Hyundai Engineering & Construction on April 26, 1995 and was opened to the public on July 3, 1997 by Seoul Mayor Cho Soon. The original Seongsu Bridge was built in 1979, and was demolished and rebuilt following the Seongsu Bridge disaster on October 21, 1994.

Original bridge
The original Seongsu Bridge was built by Dong Ah Construction Industrial Company, opening to the public on October 15, 1979. The bridge spanned 1,160 m and was 19.4 m wide, accommodating 4 lanes of traffic. Fifteen years later, on the morning of October 21, 1994, a span of the Seongsu Bridge collapsed, killing 32 people and injuring 17 others. The collapse was ruled a result of poor welding, rusted extension hinges, and lack of general maintenance— and would result in the convictions of 16 city government and construction workers on charges of criminal negligence.

In the aftermath of the disaster, the Seoul Metropolitan Government originally planned to repair and reopen the bridge to traffic within three months, but reversed course after public outcry.

New bridge
Construction for the new bridge began in March 1996 under Hyundai Engineering & Construction. Construction for the replacement bridge cost 78 billion won (equivalent to ₩ billion in ), about 6.8 times the original price. The new bridge was opened to the public on July 3, 1997, by Mayor Cho Soon, and a memorial was held on the bridge.