Deep screening of all types of main line track on group 'd' and group 'e' route of northern railway, over entire width of ballast profile including track on turnout, sej, level crossing, ballasted deck bridges (but excluding steel girder bridges), main line track in cutting, main line track on high bank, track circuited area, track with psc/cst/steel sleepers with 90r/52 kg/ 60 kg or any other rails by mechanized means along with tamping and stabilization of track using a complex of track machines consisting of ballast cleaning machine, tamper, stabilizer and ballast regulating/profiling machine using contractors own machines along with his own spares, consumables, staff etc. for operation and maintenance of the machines and other operations for carrying out the work of deep screening, tamping and ballast profiling in block during day or night as available at site.(please refer tender document for detailed scope of work)