The ₹80.25-crore Korattur stormwater drain is progressing, with 1.8km completed to reduce monsoon flooding and ease pressure on Otteri Nullah. Stormwater drain projects worth ₹56.73 crore are under way in Anna Nagar, Ambattur, and Madhavaram zones as part of flood mitigation measures ahead of the Northeast monsoon, according to the.