Engineer's Day in India, Sri Lanka and Tanzania is observed in the honour of Bharat Ratna Mokshagundam Visvesvaraya, on his birthday, on September 15. In 1908, when a catastrophic flood hit Hyderabad, the Nizam requested Sir M Visvesvaraya's services to design a drainage system and protect the city from flooding. The engineer's led the flood protection system in the city. He was the Chief Engineer of Krishna Raja Sagara dam in the north-west suburb of Mysuru (Mysore) city. 

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It was in 1968, that the Indian government declared Sir M Visvesvaraya's birth anniversary as Engineers' Day. Ever since, the country acknowledges all the engineers who have and are contributing to the development of India. 

Prime Minister Narendra Modi took to Twitter today to pay his tribute to "exemplary engineer" Sir M Visvesvaraya on his birth anniversary and said "engineers are synonymous with diligence and determination."

"Engineers are synonymous with diligence and determination. Human progress would be incomplete without their innovative zeal. Greetings on #EngineersDay and best wishes to all hardworking engineers. Tributes to the exemplary engineer Sir M. Visvesvaraya on his birth anniversary," PM Modi's tweet read. 

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"Tributes to one of India’s foremost engineers Bharat Ratna M. Visvesvaraya on his birth anniversary. His contribution is a great source of inspiration for all. Also, greetings to all the hardworking engineers on #EngineersDay. Your role in nation building is indispensable," Union Minister Piyush Goyal tweeted. 

Born in a village near Chikkaballapur, Karnataka in 1861, Sir M Visvesvaraya studied Bachelor of Arts at Madras University. He pursued civil engineering from Pune's College of Science. He  established the Government Engineering College, now known as Bengaluru's University Visvesvaraya College of Engineering in 1917. 

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The automatic barrier water floodgates were designed and patented by  Sir M Visvesvaraya in 1903. 

Sir M Visvesvaraya received the Bharat Ratna in 1955 and was also conferred the British knighthood. He served as Diwan of Mysore from 1912 to 1918.