Big Water is a town in Kane County, Utah, United States. The population was 417 at the 2000 census, a modest increase over the 1990 figure of 326. It is located 17 miles north of Page, Arizona on US-89 near Lake Powell and the Glen Canyon Dam. It was originally called Glen Canyon City and housed workers who built the dam in the 1950s. Big Water made news in the 1980s as a polygamous colony of the Joseph clan.