The dredging operation at the west of Butterfly Beach, Tuen Mun involves the laying of submarine cable by grab dredging within about 300 m from the nearest boundary of the Butterfly Beach.

• 屯门蝴蝶湾泳滩西边的挖泥工程会采用抓斗式挖泥于最接近泳滩界线大概300米内敷设海底电缆。