Zonal Contract for up-keepment of building and structures, water pipe line connections and water treatment plants and GM Bunglow at 8, Belvedere Park, Officers Flat at 90, Chowringhee Road, 6, Ramesh Mitra Road and 200X, S.P. Mukherjee Road, Officers Rest House and Officers club at Tollygunge, Staff quarters at 98, ATM Road, Tollygunge Block'A', Block'B' Block'C', 47, DPS Road, 24A, DPS Road, Fire station, TA Quarters, RPF Barrack at Tollygunge and Tapan Sinha Memorial Hospital along with water treatment installations, Fire Hydrants, pipe line work etc of Metro Railway, Kolkata upto June 2028.