 This and the output from the Regalia mill is said to have fuelled Belize's economy for about 30 years.By the start of the 20th century, however, sugar production was found to be more profitable in the Corozal and Orange Walk districts, which led to the abandonment of the Serpon and Regalia mills in 1910.In 2009, the ruins of the Serpon Sugar Mill were designated an archaeological reserve.