At zone no.5 maintenance and repair of staff quarters, service building, roads, drains etc. : all assets from km 9/9 (between rni - njb) to jorapani river including rni station and from jorapani (including) upto outer signal of new jalpaiguri at abfc end including hospital, d.s. colony area bounded by the road (incluing ) passing in front of railway institute including eastern part of central colony, barrack colony, rpsf complex, store depot, filter house complex, gang hut at km 2/6-7, insti