The dam is the largest irrigation project in Kerala.
The name 'Thenmala' translates to 'Honey Hill' in the local Malayalam language.
The Shendurney Wildlife Sanctuary, which borders the dam, is known for the presence of the rare Rosewood tree species.
The project includes a dedicated Deer Rehabilitation Centre situated within the forested buffer zone.
The reservoir area is a designated biodiversity hotspot within the Western Ghats mountain range.
Thenmala Dam is India’s first planned ecotourism destination, constructed across the Kallada River in the Kollam district of Kerala. The dam serves as the primary reservoir for the Kallada Irrigation and Tree Crop Development Project. It features a gravity dam structure that impounds water to create a vast, scenic lake surrounded by the Shendurney Wildlife Sanctuary. The site functions as a gateway to the Western Ghats, offering views of dense forest cover and endemic flora. Facilities at the site include a suspension bridge, a sculpture garden, and various boating options on the reservoir. The project was designed to integrate irrigation, hydroelectric power generation, and tourism development. Visitors can explore a network of nature trails within the adjacent ecotourism zone.
The suspension bridge provides an elevated vantage point overlooking the dam reservoir and the forested hills.
Book boat rides in advance through the official ecotourism website to ensure availability.
Carry binoculars to spot wildlife and diverse bird species near the reservoir banks.
Wear insect repellent, as the surrounding forested areas can be prone to mosquitoes.
Do not attempt to swim in the reservoir or restricted river sections due to strong currents and deep waters.
The site is typically closed to tourists during peak monsoon season if water levels reach critical safety thresholds.
Maintain silence near the dam structure; strictly follow 'no-littering' policies to protect the surrounding wildlife sanctuary ecosystem.
