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Jakarta Post

Makassar dam threatened by sediment, experts say

  • Andi Hajramurni

    The Jakarta Post

Jakarta   /   Fri, May 21 2010   /  12:43 pm

Sedimentation at the Bili-Bili dam in Gowa regency, South Sulawesi, may halve the dam's lifespan and cut its capacity to prevent future floods in Makassar, an official says. The current sedimentation level has exceeded 70 million cubic meters, much higher than the dam's maximum capacity of 29 million cubic meters, said Muhammad Yunus, the head of the dam's management. If nothing is done, the dam's expected operational lifespan might be halved from an initial estimate of 50 years, Yunus said. The Bili-Bili dam, which was completed in 1998, is 30 kilometers from Makassar. The dam was constructed in cooperation with Japan and intended to stop the Je'neberang River from flooding Makassar city. Sedimentation at the dam worsened after a 2004 landslide near Mount Bawakaraeng created a caldera full of 200 million cubic meters of debris, said Mahendro, a riverbank officia...