doubling of track between ernakulam and turavur. proposed construction of br.no.eak 10 at ch.3557 ( 3x29.20m psc girder and 1x61.00m open web steel girder) , br.no.eak 17 at ch.5907 (1x29.60 m psc girder,2x17.90 m psc u girder & 3x29.60 m psc girder) between ernakulam and kumbalam stations and br.no.eak 31at ch.10230 ( 27x 32.60 m c/c of pier psc box girder and 1x61.00 m open web steel girder) between kumbalamand turavur stations.bidding type normal tender .