Sirindhorn Dam is located in Sirindhorn District, Ubon Ratchathani Province, about 70 kilometers from the city center. It is an earth-fill dam with a clay core, built across the Huai Sai Yai stream, and is a key multipurpose dam in northeastern Thailand.

The dam was completed in 1971 and was originally named "Huai Sai Yai Dam" before being renamed "Sirindhorn Dam" in honor of Princess Maha Chakri Sirindhorn. The structure stands 42 meters high and stretches 940 meters in length, holding a reservoir capacity of around 1.966 billion cubic meters. It supports agriculture, fisheries, water supply, and hydroelectric power generation.

Sirindhorn Dam houses a hydroelectric power plant with a capacity of about 36 megawatts. It also hosts one of Thailand’s pioneering hybrid floating solar projects, integrating solar and hydropower generation to increase energy efficiency.

Besides its economic benefits, Sirindhorn Dam is a popular tourist spot. Visitors can enjoy panoramic views from the viewpoint overlooking the reservoir and the mountain ranges. The area is especially beautiful during sunset, making it ideal for nature lovers and photographers.

The dam grounds also feature a public park, playground, recreation areas, and a renewable energy learning center open to students and curious visitors. Nearby attractions include Chong Mek (Thailand-Laos border checkpoint) and Wat Sirindhorn Wararam Phu Prao (the famous "Glow-in-the-dark Temple").

In summary, Sirindhorn Dam is more than just a major infrastructure project. It’s also a valuable educational and recreational destination, offering insights into renewable energy while providing stunning natural scenery.

• From Ubon Ratchathani city, take Highway No. 2178 toward Sirindhorn District. The dam is approximately 70 kilometers away and takes about one hour to reach by private car.

• Best to travel by private or rented car for flexibility

• Bring a hat or umbrella, as the area is open and sunny

• For the best views, visit in the late afternoon to catch the sunset

• Visit the learning center to explore more about clean energy initiative

Admission Fee

• Free entry

Opening Hours

• Daily from 06:00 AM – 06:00 PM