dindigul - madurai (up line) section :- (a) pro.construction of catch water drain at the top ofambaturai deep cutting between km:-447.600 to 448.800 on both lh & rh side (b)proposed improvements to ambadurai deep cutting by laying plain cement concrete at sidedrain between km:- 447.700 to 449.800 on both lh & rh side for a length of 2.100 kms tothe required gradient for free flow of drain water between stations ambaturai & kodaikkanalroad in madurai / bg permanent way section. [ work to be executed under block protectiononly]bidding type normal tender .