Gurugram: Repair works are still being undertaken at the IFFCO Chowk underpass even as it was opened for the traffic on Saturday evening. Due to Friday rains, a part of the underpass had caved in leading to the NHAI to close the underpass for more than 24 hours.Officials of the NHAI said that most of the repairs were completed by Saturday morning by clearing the high deposition of slush had become a time-consuming hindrance, which delayed the opening of the underpass. Also Read – After eight years, businessman arrested for kidnap & murderNHAI officials explained that ‘extension joints’ are essentially the attachment of the concrete wall of the underpass and its boundary wall, to support the structure. Gaps in the extension joints on Friday had resulted in large amounts of rainwater entering the underpass. A stiffener is similar to a metallic bolt, holding the two structures together, they said. With the underpass being located in a low-lying area, NHAI officials also said that it remains vulnerable to flooding whenever there is heavy rain. Also Read – Two brothers held for snatchingsThere have been various occasions due to heavy rains the IFFCO Chowk underpass has been completely inundated. The incident of inundation of the underpass first came in 2018 when the underpass was being constructed. That time it had been highlighted that how massive amount of water stored could weaken the structure. Friday rains once again exposed the quality of construction in the city. Inaugurated in the month of April this year, the public officials from NHAI as well as Gurugram agencies were left in an embarrassing position again when MG Road underpass developed cracks and a portion of it collapsed due to heavy rainfall.