On Sunday, September 17, India will get its biggest dam ever made. Sardar Sarovar Dam, the project that has been forever in controversy, will be inaugurated by Prime Minister Narendra Modi to mark his 67th birthday.

Here are top 5 facts about Sardar Sarovar Dam:

Here are top 5 facts about Sardar Sarovar Dam:

1: The foundation stone of the Sardar Sarovar Dam was laid by India's first Prime Minister Jawaharlal Nehru on April 5, 1961. It is the second biggest dam in the world after Grand Coulee Dam in the US.

2: There are 30 gates of the dam. Each gate of Sardar Sarovar Dam weighs over 450 tonnes and it takes one hour to close them.

3: The dam has already earned Rs 16,000 crore, which is more than double the cost of the mega structure.

4: The current height of the dam is 138 metres that makes it the biggest structure ever made in the country. The Narmada Control Authority had ordered the gates of the Sardar Sarovar Project be shut on June 16. The gates of the country's highest dam were closed the following day.

5: The dam has storage capacity of 4.73 million cubic metres. The construction of the dam was not exactly a smooth journey. In 1985, the protests by Medha Patkar and other activists slowed down the constcrution.