We were being employed by CEDD to undertake the design and construction supervision for this assignment comprising 2 packages, namely Package A and Package B. The Package A for first Contract IS/2010/01 Construction of Riverwall at Yat Chung and Ancillary Improvement Works with a stormwater pumping station and underground structures of about 5m depth. In this pumping station design, we have duly considered floatation, water pressure and uplifting in our design. Moreover, we have competed the design of flood barriers to alleviate the immediate needs of local Tai O residents as flooding preventive measures including flooding mitigation measures and the design improvement to local nullah, to the satisfaction of CEDD, DSD, FSD, etc.