PM Modi in Mumbai today to launch Atal Setu, India’s longest sea bridge

Syllabus: GS-III

Subject: Economic Development

Topic: Infrastructure.

Context: PM Modi inaugurates the 22-km Mumbai Trans Harbour Link (MTHL), India’s longest sea bridge.

Issue: India’s Longest Sea Bridge.

Synopsis:

  • The link connects Sewri in Mumbai to Chirle in Raigad, Navi Mumbai, reducing travel time by 45 minutes.
  • Renamed from ‘Atal Bihari Vajpayee Sewari-Nhava Sheva Atal Setu.
  • Loan assistance from Japan International Cooperation Agency.

Benefits and Usage:

  1. Improves connectivity in the Mumbai Metropolitan Region, and reduces congestion between Mumbai and Navi Mumbai.
  2. Faster access to Mumbai International Airport and Navi Mumbai International Airport. Expected to substantially reduce travel time to key destinations in Maharashtra and southern parts of the country.
  3. Promotes regional economic development, and reduces travel time to Alibaug, Pune, Goa, and southern regions. Connectivity Boost: Enhances connectivity between Mumbai Port and Jawaharlal Nehru Port, facilitating economic growth and development.

Challenges:

  • Constructing segments in the marine portion required digging as deep as 47 meters, posing engineering challenges.
  • The bridge’s proximity to sensitive establishments like ONGC, JNPT, and BARC complicated construction to avoid damage to underwater installations.
  • While engineers and experts were sourced globally, coordinating diverse teams and ensuring seamless collaboration presented logistical and communication challenges.

Iconic Indian Bridges:1.     Bandra Worli Sea Link (Mumbai):Cable-supported bridge, opened in 2009.

Connects Western and Southern Mumbai, reducing travel time from one hour to 10-15 minutes.

2.     Howrah Bridge (Kolkata):

Constructed in 1943 over Hooghly river.

Famous landmark of Kolkata, constructed without using any nuts or bolts.

3.     Vidyasagar Setu (Kolkata):

Second Hooghly bridge, opened in 1992.

Named after Ishwar Chandra Vidyasagar, longest cable bridge in India, with six lanes.

4.     Mahatma Gandhi Setu (Bihar):

Over Ganges, opened in 1982, connecting Patna and Hajipur.

Constructed by Gammon India Limited, commemorated with a postal stamp.

5.     Pamban Bridge (Tamil Nadu):

Opened in 1914, linking Rameshwaram island and mainland.

Features a central part that can be opened for passing ferries.

6.     Coronation Bridge (West Bengal):

Over Teesta river in Siliguri, named after King George VI and Queen Elizabeth’s coronation.

7.     Golden Bridge (Gujarat):

Constructed in 1881 over the Narmada river.

A significant landmark built by the British for trade and access to Mumbai.

8.     Godavari Arch Bridge (Rajahmundry):

Best arch bridge in Asia, spanning Godavari River.

Prestressed bridge, resistant to cyclonic storms.

9.     Jadukata Bridge (Meghalaya):

Cantilever bridge spanning Kynshi river in Ranikor.

10.  Dhola-Sadiya Bridge (Assam-Arunachal Pradesh):

Longest river bridge in India, opened in 2017 over Lohit river.

Connects Assam and Arunachal Pradesh, reducing travel time and enhancing border protection capabilities.

 

 

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