On March 26th of 2004, the Caldera Wall of Bawakaraeng Mountain, upstream of the affluent of Bili Bili River, collapsed and caused a massive landslide for a 2.5km length. This was the largest landslide recorded in Indonesia.

The total amount of debris deposits along the Jeneberang river was estimated at 200 to 300 million m3. In the town of Lengkese, the disaster caused 32 residents dead or missing. Also, the debris deposits have flown down along the Jeneberang river and affected the reservoir of Bili Bili Dam located downstream of the landslide site or near Makassar City, reducing significantly the storage capacity of reservoir for a very short time which leads to shortening the lifespan of dam itself.

To cope with this critical situation, an emergency erosion control survey was carried out to identify the optimum countermeasures and activities which should be put into force immediately within 5 years.

After specifying the possible risk of future landslides, implemented were the works such as removal of debris deposited in the existing sand pocket dams, rehabilitation and reinforcement of the existing land slide prevention facilities, and construction of a Sabo dam. Also, proposed were installation of an automated disaster monitoring system and elaboration of hazard maps, and formulated was an integrated sediment related disaster management (ISDM) plan that meets the lifestyle of the residents in the areas.