The intricate subterranean British-era old stormwater drain network in Mumbai's financial hub may be a part of the city's heritage history, but it is no longer efficient in dealing with heavy rainfall. The Brihanmumbai Municipal Corporation (BMC) conducted a detailed condition evaluation of the 32 km network of old British-era arch sewers that run across the island metropolis as part of its upkeep.
The rehabilitation of the whole drainage network in South Mumbai began in 2010, but progress has been gradual. According to an official, at least 36 km of the city's 70 km of British-era drains are arch drains and 34 km are pipe drains. Cameras were used to inspect the majority of these drains.
The majority of these British-era drains in South Mumbai are in bad shape and need immediate repair, rehabilitation, or replacement. The civic stormwater drain department has already developed a study on the subject, and after it is completed, the department will determine which of these drains will require only minor repairs and rehabilitation, and which will need to be replaced or converted into RCC box drains.
"The condition assessment of a 32-kilometer drain network is now complete. Another month will be required to complete the report. Then we'll get to work on the ones that need to be repaired and the ones that need to be converted to RCC box drains. We need to figure out where improvements are needed; we identified blockages, utility cables, and other things in several spots.
According to the initial assessment/analysis, just a few of these drains require replacement at this time. The life of these drains would be extended by 50 years or more once the rehabilitation and repair work, which includes lining and coating, is completed" said a senior
BMC official, emphasizing the importance of drain strengthening.
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