Crescent Creek is a stream flowing through the south-east region of Saskatchewan, Canada, originating in the Beaver Hills and moving in an easterly direction into Crescent Lake. It is a tributary of Yorkton Creek, which connects northward into the Whitesand River and ultimately drains into the Assiniboine River system. A notable feature along its course is the Melville Reservoir — also known as Crescent Creek Reservoir — a man-made lake situated northwest of the city of Melville. The dam forming this reservoir was originally constructed in 1921 by the Canadian National Railway to supply water for railway operations, and the City of Melville later acquired it in 1958, subsequently developing it as a municipal drinking water source with a treatment plant built in 1959. The reservoir has a total capacity of approximately 4,406,000 cubic metres, with significant expansions completed in 1977 and 1979.