Kolkata, Aug 1: The West Bengal government has sought help from scientists to crack down on the menace of rats boring deep holes at the base of a 380 metre-long key flyover in the eastern metropolis, an official said.
Built in 1963, the Dhakuria flyover in south Kolkata is one of the oldest concrete flyovers in the city and is a lifeline for commuters to and from Garia, Jadavpur and other areas in the south. It stands on inclining concrete walls filled with earth or sand.
In 2013, a portion of the bridge walkway collapsed prompting the state government to ask a central engineering consultancy company for a check-up of the structure.
Prior to the collapse, an investigation revealed rats had burrowed large holes underneath the structure that continues to function way past its retirement age.