Marine Drive Tetrapods to Be Replaced by 2025
The iconic Marine Drive in Mumbai is set for a significant upgrade as the Brihanmumbai Municipal Corporation (BMC) has approved the replacement of its aging tetrapods, which have been in place since the 1960s. The old tetrapods, originally installed between 1960 and 1965, with some replacements made between 1982 and 2002, are nearing the end of their operational lifespan. Made from M20 grade cement, these tetrapods were designed to withstand the forces of the sea for around 40 years. However, after decades of service, many have deteriorated, and some were even damaged by Cyclone Nisarga.
The new tetrapods will be constructed using M40 grade cement, which is a much stronger material, ensuring durability for the next 100 years. The project, costing ₹43.61 crore, is slated for completion by May 2025. This initiative is part of the ongoing efforts by the BMC to protect the city’s coastline from erosion, as the tetrapods play a crucial role in preventing soil erosion by breaking the force of the waves that hit the coast. A civic official highlighted that the old tetrapods’ lifespan had already expired, and shifting them back in place, particularly after the Coastal Road project removed some along a 3 km stretch, was not viable. The removal of these tetrapods during the construction of the Coastal Road had left some parts of the iconic Marine Drive promenade exposed to the full force of the waves, which led to visible damage. However, with the completion of the restoration work on the promenade last year, the focus has now shifted to replacing the tetrapods.
While the new tetrapods are expected to last for a century, the project also aims to address previous concerns. Two years ago, residents of buildings along Marine Drive complained of vibrations caused by the crashing waves. In response, the BMC temporarily reinstated tetrapods in the affected areas. The new tetrapods will not only offer improved protection against erosion but also help prevent the recurrence of such disturbances. This proactive approach by the BMC signals a long-term commitment to safeguarding Mumbai’s coastline and the aesthetic value of Marine Drive, ensuring that the promenade continues to be a major attraction for residents and tourists alike.
