Watson's Mill is an historic flour and gristmill in Manotick, Ontario, Canada. It is the only working museum in the Ottawa area and one of very few operating industrial grist mills in North America. Indeed, Watson's Mill still sells stone-ground whole wheat flour which is made on site. The mill is also well known for its ghost story. The legend is that Ann Currier, wife of Joseph, haunts the mill, following her death in a tragic accident there in 1861. Watson's Mill is Manotick's most recognized landmark. Its image is used as a symbol for the village.
Moss Kent Dickinson and Joseph Merrill Currier founded the mill as the Long Island Milling Enterprise in 1860. It was one of a series of mills constructed in the area using power from the Rideau Canal. It earned its current name when it was purchased by Harry Watson in 1946. Watson was the last owner to operate the mill at an industrial level. When the Rideau Valley Conservation Authority bought the mill in 1972, it was developed into a museum.
The mill is open to the public during the summer months and hosts a variety of events, including milling demonstrations every Sunday.
Watson’s Mill was originally known as the 'Long Island Milling Enterprise', and was constructed by Thomas Langrell, an Ottawa contractor, for two prominent Ottawa businessmen: Moss Kent Dickinson and Joseph Merrill Currier. Dickinson was a successful forwarder and steamboat owner. He was nicknamed 'King of the Rideau' because of his many freight and passenger steamers that travelled up and down the Canal. Dickinson was also mayor of Ottawa from 1864 to 1866, just prior to Confederation, and lived in what is now the South African Embassy. His partner, Joseph Currier, was a lumber baron, and a partner in the Victoria Foundry located in Ottawa, where all of the Mill machinery was cast. Watson’s Mill was originally one of four milling operations built at the same time. A saw mill was completed in 1859, the gristmill in 1860, and a carding mill in 1861. The Canada Bung, Plug and Spile Factory was constructed in 1875, completing the Long Island Milling Enterprise, later to be known as the 'Manotick Mills'.