The scope of the project comprises the construction of drainage tunnels of 3.7km long and 4.9m in diameter, 6 intake structures along Ching Cheung Road and Tai Po Road, a stilling basin at the former Wai Man Tsuen and an outfall near Stonecutters Island.

The drainage tunnels are deep into the ground from Chak On Estate via stilling basin at the former Wai Man Tsuen to Victoria harbour near Stonecutters Island to intercept and convey the stormwater from the upper catchments directly to the sea near Stonecutters Island