You’ll cross many 5 main tributaries of the Chao Phraya on the Northern Line. The Pa Sak is one of the main sources of flooding in downstream Bangkok, so in 1998, the Thai government built a dam about 100km upstream to the Northeast of here. At nearly 5 kilometers long and 37 meters high, the barrage forms the largest reservoir in central Thailand, thereby also helping to irrigate an area which is one of Thailand’s most dry.
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