The first irrigation dam in Thailand and a major blood line used for irrigation and agricultural irrigation by draining rivers in the north to the central region and the Gulf of Thailand. Forwarded to the central plantation area. into 5 large water canals, namely, the Noi River, the Tha Chin River, the Makham Thao-U Thong Canal Chainat-Pasak Canal and Chainat-Ayutthaya Canal It is also used to generate electricity for distribution in Chainat Province, the strength of the dam construction. The best time to visit is January. Because at the beginning of the year there will be a cool and relaxing atmosphere with a pleasant view and watching tens of thousands of teal birds that come out to feed on the river above the dam is a rare natural beauty.