Kutai Kartanegara Bridge

The Kutai Kartanegara Bridge (also known as the Mahakam II Bridge) is an arch bridge, formerly a suspension bridge, located in Kutai Kartanegara Regency, East Kalimantan, on the island of Borneo in Indonesia. It crosses the Mahakam River and connects Tenggarong and Tenggarong Seberang districts, as well as roads that lead to Samarinda.

Kutai Kartanegara Bridge, prior to the November 2011 collapse. (April 27, 2011)

Kutai Kartanegara Bridge
The bridge as of 2016
Coordinates	0.444433°S 117.00288°E / -0.444433; 117.00288
Crossed	Mahakam River
Locale	Kutai Kartanegara Regency, East Kalimantan, Indonesia
Official name	Kutai Kartanegara ing Martadipura Bridge
Characteristics
Design	Suspension bridge[1] (original) Arch bridge[1] (new)
Material	Steel[1]
Total length	710 m (2,329 ft)[1]
Longest span	270 m (886 ft)[1]
Clearance above	5 m (16 ft)
Clearance below	15 m (49 ft)[2]
History
Constructed by	PT Hutama Karya
Construction start	17 August 1995 (original) 10 April 2013 (new)
Construction end	2001 (original) November 2015 (new)
Opened	Early 2002 (original) 7 December 2015 (new)
Collapsed	26 November 2011 (original)
Location

The 710-metre-long (2,329 ft) bridge, which featured a 270-metre-long (886 ft) suspended section, was intended to resemble San Francisco's Golden Gate Bridge. Construction on the bridge commenced in 1995 and was completed in 2001.^[3] It was the longest suspension bridge in Indonesia.^[2]

On 26 November 2011, the bridge collapsed only ten years after it was completed, killing at least 20 people and injuring 39.

The bridge was constructed by state-owned builders PT Hutama Karya^[3] at a cost of Rp 150 billion (US$16.4 million).^[4]

Collapse

On 26 November 2011 at 9:59pm (local time),^[5][6] while workers were performing maintenance on the bridge, a support cable snapped^[3] and the structure suffered a catastrophic failure. The roadway fell into the 50-metre-deep (164 ft) Mahakam River below, leaving only the two bridge towers and some support cables remaining. At least 20 people were killed^[7] and 40 were injured,^[5] with an additional 19 people reported missing.^[7] Research findings have shown that the collapse was largely due to construction failure of the vertical hanging clamp. It was also found that poor maintenance, fatigue in the construction material of cable hanger, and the quality of material, may have also impacted the collapse of the bridge.^[8]

A replacement arch bridge was built in 2013 and formally opened in December 2015.

Gallery of images after the 2011 collapse

• 
  View from the main road
• 
  Remains of the bridge
• 
  North view
• 
  The two remaining pillars

References

1. "Kutai Kertanegara I Suspension Bridge | Structurae". en.structurae.de. 2011. Retrieved 28 November 2011.
2. "DSI > Markets > References > First use of 63.5 mm dia. GEWI Bar in Indonesia". dywidag-systems.com. 2011. Archived from the original on September 12, 2011. Retrieved 28 November 2011.
3. "At least 3 dead and scores injured as Indonesia's 'Golden Gate Bridge' collapses". NBC News. 2011-11-26. Retrieved 2011-11-29.
4. Arnaz, Farouk; Agus Triyono (2011-11-29). "Materials, Planning Eyed in Bridge Collapse". The Jakarta Globe. Archived from the original on 2013-02-04. Retrieved 2011-12-02.
5. "Collapsed bridge death toll rises to 19". The Jakarta Post. 2011-11-30. Archived from the original on 2011-12-02. Retrieved 2011-12-02.
6. "Hunt for survivors after Indonesia bridge collapse". ABS-CBN News. 2011-11-27.
7. "Plans to Build New $33 million Bridge After Disaster". The Jakarta Globe. 2011-12-01. Archived from the original on 2011-12-02. Retrieved 2011-12-02.
8. "Basic Engineering Errors Led To Indonesia Bridge Collapse". 2012-01-26.