Krasiao Dam

Krasiao Dam is a large earthen dam and reservoir in Huai Khamin Subdistrict, Dan Chang District, Suphan Buri Province, western Thailand. Completed in 1981 by the Royal Irrigation Department on the Krasiao River, it is recognized as the longest earthen dam in Thailand at 4,250 meters. The dam provides irrigation and flood control and is notable for its expansive reservoir, scenic mountain backdrop and popular sunset viewpoint along the dam crest.

Visitors can expect a long, flat earthen dam crest stretching across a wide reservoir with open views of water and surrounding hills. The area offers a paved road along the dam for walking, cycling and driving, viewpoints for photography, and a calm reservoir landscape. Facilities are basic with parking and food stalls near the entrance, and the setting is open and windy with little shade.

Constructed by the Royal Irrigation Department between 1980 and 1981 on the Krasiao River, a tributary of the Tha Chin River. With a length of 4,250 meters, height of 32.5 meters and storage capacity of about 240 million cubic meters, it is the longest earthen dam in Thailand, built for irrigation, water storage and flood control for agricultural areas in Suphan Buri and nearby provinces.

The reservoir supports local agricultural livelihoods and has become a well-known recreational and scenic landmark for residents of Dan Chang and visitors, valued for community leisure, photography and sunset viewing.