The Idukki Arch Dam: Tourist Places to Visit

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The Idukki Arch Dam, located in the southern Indian state of Kerala, is an iconic engineering marvel that stands as a testament to human ingenuity and the harmonious coexistence of modern infrastructure within the lap of nature. Nestled amidst the lush Western Ghats, this colossal arch dam plays a pivotal role in water resource management, hydroelectric power generation, and as a major tourist attraction in the region. In this article, we will explore the Idukki Arch Dam, its history, significance, and the awe-inspiring experience it offers to visitors.

Historical Significance

The Idukki Arch Dam, also known simply as Idukki Dam, was constructed as part of the Idukki Hydroelectric Project, which aimed to harness the immense hydroelectric potential of the region’s water bodies. The dam was commissioned in 1976 and inaugurated by the then Prime Minister of India, Indira Gandhi. It was built on the Periyar River, which flows through the rugged terrain of the Western Ghats.

Engineering Marvel

The Idukki Arch Dam is renowned for its unique and innovative design. Key engineering features include:

  1. Arch Shape: Unlike traditional gravity dams, the Idukki Dam is designed in the shape of an arch. This arch design helps distribute the immense water pressure to the rocky hills on either side of the Periyar River.
  2. Double Curvature: The dam features a double curvature arch, making it one of the few of its kind in the world. This design enhances the dam’s strength and stability.
  3. Height: The dam stands at an impressive height of 168.91 meters (554 feet) and stretches over 365 meters (1,198 feet) in length.
  4. Underground Powerhouse: Beneath the dam, there is an underground powerhouse that generates hydroelectric power. It has several generators with a combined capacity of 780 megawatts, making it one of the largest hydroelectric power stations in India.

Significance and Functions

  1. Hydroelectric Power Generation: The primary purpose of the Idukki Arch Dam is to generate hydroelectric power. It contributes significantly to Kerala’s power grid and helps meet the energy needs of the state.
  2. Water Resource Management: The dam plays a crucial role in regulating the flow of the Periyar River, which is essential for irrigation, domestic water supply, and industrial purposes in the region.
  3. Tourist Attraction: Beyond its functional roles, the dam is a major tourist attraction in Kerala. Visitors flock to witness the grandeur of the dam, its stunning surroundings, and the panoramic views it offers.

Visiting Idukki Arch Dam

  • Location: The Idukki Arch Dam is situated in the Idukki district of Kerala, approximately 114 kilometers (71 miles) from the city of Kottayam.
  • Viewpoints: There are viewpoints and watchtowers near the dam that provide breathtaking vistas of the dam and the lush landscape. The panoramic view is particularly stunning during the monsoon season when the dam overflows.
  • Visitor Center: There is a visitor center near the dam that offers insights into the dam’s history, construction, and the broader hydroelectric project. It’s a great place to learn more about the significance of the dam.
  • Timing: The dam and its viewpoints are open to visitors during specific hours, so it’s advisable to check the timing before planning your visit.

Best Time to Visit

The best time to visit the Idukki Arch Dam is during the post-monsoon season, from October to February. The weather is pleasant, and the surrounding landscape is lush and green. However, the monsoon season (June to September) offers a unique experience as the dam overflows and the waterfalls come to life.


The Idukki Arch Dam is a remarkable blend of engineering prowess and natural beauty. It stands as a symbol of Kerala’s commitment to sustainable energy generation and resource management. For visitors, it offers a chance to witness the grandeur of the dam, soak in the stunning vistas of the Western Ghats, and appreciate the delicate balance between human innovation and the awe-inspiring landscapes of the region. A visit to the Idukki Arch Dam is not only educational but also an opportunity to connect with nature and marvel at human achievements.