The Thames Quarry Company opened this limestone quarry in the mid-1880s and ceased operations in 1930.  Between 1930-1935 the quarry filled with water.  In 1945 the Town of St. Marys bought the quarry and turned it into a swimming facility.  Former Prime Minister of Canada, Pierre Trudeau, dove off the high diving board while visiting St. Marys in 1968 during his term as Prime Minister.  In 1983 the Aggregate Producers’ Association of Ontario presented a prestigious bronze plaque to the Town of St. Marys and St. Marys Cement Limited for outstanding rehabilitation to recreational use.  (Photos courtesy of S.E. Yundt)

updated:  June 21, 2004