The dam is an earth-fill structure, contrasting with the concrete gravity dams common in other regions.
The reservoir covers an area of approximately 46.5 square kilometers at full capacity.
It was inaugurated in 1966 as part of a royal development project initiated by King Rama IX.
The Phetchaburi River, which feeds the reservoir, originates deep within the interior of the Kaeng Krachan National Park.
The dam is a critical component in managing the water supply for agricultural land in the Phetchaburi and Prachuap Khiri Khan provinces.
Kaeng Krachan Dam is the largest earthen dam in Thailand, creating a vast reservoir that serves as the gateway to the expansive Kaeng Krachan National Park. The dam structure spans the Phetchaburi River, facilitating irrigation and hydroelectric power generation for the Phetchaburi province. Visitors can access the crest of the dam to observe panoramic views of the water body and the surrounding mountain ranges. The reservoir features several small islands, some of which are accessible by rented long-tail boats. The area is a recognized hotspot for birdwatching and wildlife spotting due to its proximity to deep forest zones. A suspension bridge nearby offers an alternative viewpoint of the river outlet below the dam wall. The site is characterized by its quiet, sprawling landscape rather than commercial infrastructure.
The center of the dam crest looking back toward the reservoir islands at sunset.
Bring a polarizing filter for your camera to reduce glare from the large water surface.
Carry sun protection as there is minimal natural shade on the dam crest.
Plan to visit the nearby national park headquarters if you intend to explore the surrounding jungle trails.
Do not attempt to swim in the reservoir near the dam wall due to strong currents and deep water hazards.
Maintain a quiet volume near residential areas, and observe standard modest dress when interacting with local communities.
