For the second airport in Chennai, an OLS survey would be conducted at two locations

The Ministry of Civil Aviation told the media that the Obstacle Limitation Surface (OLS) Survey is required at the two shortlisted sites for Chennai’s second airport, Pannur and Parandur, because they have obstructions.

Officials will check for obstructions around the site after the survey and assess the feasibility of operations. The authorities could choose between the two sites for the second airport.

According to Jyotiraditya M Scindia, Minister of Civil Aviation, the Airports Authority of India (AAI) has determined that two sites in Pannur and Parandur are more feasible for the airport project due to the availability of air space and the absence of natural obstructions. However, man-made obstacles are present at the sites, and some hazards, such as lakes and smoke-producing industries, can only be determined after the OLS Survey and Site Survey are completed.

According to a report, after inspecting four sites, AAI shortlisted Parandur and Pannur and sent a pre-feasibility study to Tamil Nadu Industrial Development Corporation (TIDCO).
Scindia stated that 633.17 acres of land are needed at the Madurai airport for air and city-side expansion projects, such as runway extension, parallel taxi track construction, terminal and cargo buildings, and so on.
AAI has been given 528.65 acres by the state government, with the remaining 104.52 acres awaiting transfer.