Bhupen Hazarika Setu also known as Dhola Sadiya Bridge is the longest bridge of India.

The longest river bridge in India is the Dhola-Sadiya Bridge, also known as the Bhupen Hazarika Setu. It is located in the northeastern state of Assam and spans the mighty Brahmaputra River. Here is a detailed explanation about this remarkable bridge.

The Dhola-Sadiya Bridge:

The Dhola-Sadiya Bridge is an engineering marvel that connects the towns of Dhola and Sadiya in the Tinsukia district of Assam. It is built over the Brahmaputra River, one of the largest rivers in India, and is approximately 9.15 kilometers (5.69 miles) long. The bridge was inaugurated by the Prime Minister of India, Narendra Modi, on May 26, 2017.

Importance and Benefits:

The construction of the Dhola-Sadiya Bridge has brought numerous benefits to the region. Here are some key points:

1. Connectivity: The bridge has significantly improved connectivity between the eastern part of Assam and the rest of the country. It has reduced the travel time between Dhola and Sadiya from over six hours to just about 30 minutes.

2. Strategic Significance: The bridge is of strategic importance as it provides a direct route to the easternmost regions of Arunachal Pradesh, which shares a border with China. It facilitates easier transportation of goods and supplies to the border areas, enhancing national security.

3. Economic Growth: The improved connectivity has opened up new avenues for economic growth in the region. It has boosted tourism, trade, and commerce, thus contributing to the overall development of the area.

4. Social Impact: The bridge has also had a positive impact on the lives of the local communities. It has made it easier for people to access essential services such as healthcare and education, which were previously limited due to the river's barrier.

Engineering Feats:

The construction of the Dhola-Sadiya Bridge involved several engineering challenges. Here are some notable features:

1. Length: With a length of 9.15 kilometers, the bridge is the longest river bridge in India. It surpasses the length of the Bandra-Worli Sea Link in Mumbai, which was previously the longest river bridge in the country.

2. Foundation: The bridge's foundation was built using a well-designed pile foundation technique. It involved driving steel-reinforced concrete piles deep into the riverbed to provide stability and support to the bridge structure.

3. Superstructure: The superstructure of the bridge comprises pre-stressed concrete box girders, which are designed to withstand the river's strong currents and seismic forces. These girders are supported by pillars and piers at regular intervals.

4. Design Life: The Dhola-Sadiya Bridge is designed to have a lifespan of 100 years, ensuring its durability and longevity.

In conclusion, the Dhola-Sadiya Bridge is the longest river bridge in India, spanning the Brahmaputra River. Its construction has brought significant improvements in connectivity, strategic significance, economic growth, and social impact. The bridge stands as a testament to India's engineering prowess and has become an iconic landmark in the region.