Barito River
The river is about long and up to deep. It flows through marshy region rich in tropical forests, nearly parallel to the Barito River, and merges with the latter about 60 km from the Java Sea coast, within the town of Kualakapuas (lit. mouth of Kapuas in Indonesian). Between 1880 and 1890, a 30 km long canal was dug by the Dutch colonizers between the Kapuas and Barito river for agricultural purposes. The Kapuas River is narrow (about 50 m) and very winding in its upper stream. It straightens and widens up to 450 m in its lower reaches. There, it contains several elongated islands (shorter than 2 km). Its discharge rate varies through the year reaching the maximum in the peak of rainy seasons in April and November. The river is navigable up to 420 km from the mouth. Significant deposits of coal and gold were discovered upstream. Because of the lack of infrastructure, the gold is mined mostly by primitive methods, with only one commercial mine on the river, and the coal is not explored yet. Several bridges cross the Kapuas River. One of them, located near the village Lungku Layang, Timpah (), Kapuas Regency, Central Kalimantan, collapsed on 3 April 2009 killing one and injuring 6 people working under the bridge.