The Dee Estuary  has now become  near impossible to navigate  due to the dramatic exceleration of sediment disposition  which began in the 18th century eventually giving birth to the port of Liverpool. The Welsh coast of the estuary was industrialised at an early stage, gas fired power stations, chemical works and paper mills lining the coast. Remains of past industry is visible along the whole length of the estuary, with waste heaps and contaminated terrain.