The lake runs 92 miles end to end. At roughly 1,150 miles, the total shoreline of the Lake of the Ozarks is longer than the coastline of California. The lake was the largest man-made lake in the United States, when it was completed in 1931 by the Union Electric Co. of St. Louis. The total cost to build Bagnell Dam was approximately $30 million (nearly $360 million in today's money). At 17,741 acres, Lake of the Ozarks State Park is the largest park in Missouri. Lake of the Ozarks covers 61,000 acres and contains 617 billion gallons of fresh water, what the city of St. Louis typically uses over a decade. Roughly 3.5 million tourists visit Lake of the Ozarks from Memorial Day to Labor Day.