SHILLONG: This is for the information to all concerned that the Greater Shillong Water Supply Works at Mawphlang shall be put under shutdown for 12 hours on 8th September 2017 from 10:00 hours onwards on account of desiltation of the 7.5 MGD Clari-flocculator including preventive maintenance of the 600mm M.S. Pumping Main.This was informed by the Executive Engineer (PHE), Electrical Division, Mawphlang.