Sea erosion in Dadar, Malabar Hill, Mahim and Versova is posing a major risk to infrastructure, says a study. The Maharashtra Shoreline Management Plan 2017, commissioned by the Maharashtra Maritime Board (MMB), looked at erosion of the coastline, including beaches, in the past five years. The study, prepared by Sanctuary Beach Pte. Ltd from Singapore, says erosion of the 2.5km Dadar beach, along Prabhadevi and Shivaji Park, poses high’ risk to infrastructure due to continuous erosion over five years. There is need for beach nourishment, improving the water quality of Mithi river that directly discharges sewage into the sea and potential marine development, the report recommended. The study, done in June, was released recently by the MMB. On Tuesday, citizens’ group Watchdog Foundation wrote to the state government, expressing concerns abut the findings and asked various state government agencies to address the issue while finalising the revised draft development plan 2034 as well as Coastal Zone Management Plan for Mumbai. It is a matter of concern and development activities should be put on hold until this issue is resolved. It will have adverse consequences in the future, said Godfrey Pimenta, trustee, Watchdog Foundation. Apart from Dadar beach, Priyadarshani Park in Malabar Hill and Versova were getting eroded, posing a major’ risk to infrastructure. The solution to the receding shoreline, the study said, was allowing the areas to naturally recover sand that was lost. In Juhu, seasonal variations was causing erosion and allowing the beach to replenish itself was called for. Areas like Girgaum Chowpatty, Aksa and Gorai beaches had minor’ erosion risk to infrastructure, but these areas also needed attention, the study says. Officials from MMB said the study establishes a predicted risk to infrastructure for 2050 and 2100 with the added issue of sea level rise. More or less, 80% of the state is fine, but remaining areas need to be worked on. If we do not act now and take preventive action, it will disastrous for 2050 and 2010. There are certain places that need critical evaluation at this juncture because it will be very difficult to handle it later, said Jitendra Raisinghani, deputy director, coordination, MMB. We will implement all recommendations as per the project report.