The Bangalore Metro Rail Corporation Limited (BMRCL) has begun preparations for the geotechnical investigation of the 36.59 km Phase 3A (Red Line) of Namma Metro, connecting Hebbal to Sarjapur. This metro corridor includes a 22.14 km elevated section from Sarjapur to Koramangala and a 14.45 km underground section from Koramangala 2nd Block to Hebbal.
Estimated at ₹28,405 crore (₹776.3 crore per km), this project is considered one of the costliest metro projects. Last year, the state government approved the project and recommended it for central government approval. However, due to the high cost, the central government has directed BMRCL and the state government to revise the expenses. Lavie Luxe Women's Kiss Clutch | Ladies purse |Gift For Women
BMRCL is now consulting a private agency to formulate a cost-reduction plan. BMRCL has invited tenders for the geotechnical survey, to be conducted in four phases:
Sarjapur station to Carmelaram station (10 km) – Elevated corridor.
Carmelaram to Koramangala 3rd Block (9 km) – Elevated corridor.
Koramangala 2nd Block to K.R. Circle station (9 km) – Underground section.
K.R. Circle to Hebbal (9 km) – Underground and elevated sections.
The tender will open on November 5, 2025. The 36.5 km Phase 3A line, with a completion target of 2031, will feature 17 stations on the 22.14 km elevated corridor and 11 stations on the 14.4 km underground section. Five interchange stations will be built at Ibbaluru, Agara, Dairy Circle, K.R. Circle, and Hebbal. Senior RSS Leader Prof. K. Narahari Passes Away
What is a Geotechnical Study?
A geotechnical investigation studies the soil and subsurface conditions along the metro corridor. It assesses the depth of tunnels, safety measures for underground stations, ground response to dynamite blasting, potential impact on surface structures, and the depth and design of pillars for the elevated corridor. BMRCL will review the findings, as per metro officials.