| Bridge Name: | Kutai Kartanegara Bridge |
| Official Name: | Kutai Kartanegara ing Martadipura Bridge |
| Crosses: | Mahakam River |
| Locale: | Kutai Kartanegara Regency, East Kalimantan, Indonesia |
| Design: | Suspension bridge (original)Arch bridge (new) |
| Material: | Steel |
| Length: | [1] |
| Below: | [2] |
| Builder: | PT Hutama Karya |
| Begin: | 17 August 1995 (original) 10 April 2013 (new) |
| Complete: | 2001 (original) November 2015 (new) |
| Open: | Early 2002 (original) 7 December 2015 (new) |
| Collapsed: | 26 November 2011 (original) |
| Coordinates: | -0.4444°N 117.0029°W |
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.
The 710m (2,330feet) bridge, which featured a 270m (890feet) suspended section, was intended to resemble San Francisco's Golden Gate Bridge. Construction on the bridge commenced in 1995 and was completed in 2001. 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]
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 50m (160feet) 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.