Grandglaize Creek is a creek and tributary to the Osage River that forms the Grand Glaize Arm of the Lake of the Ozarks in Missouri. The creek flows for before reaching the Lake of the Ozarks, and the Grand Glaize Arm extends another before reaching the Osage River within the lake. The creek as recognized by the Geographic Names Information System (GNIS) is spelled as one word. However it is widely spelled as two words Grand Glaize. It should not be confused with the Grand Glaize Creek which is a tributary to the Meramec River in St. Louis County, Missouri. The creek is formed by the confluence of Dry Auglaize Creek and Wet Glaize Creek about one mile north of Toronto, Missouri in Camden County. From there it flows north into Miller County. According to the Missouri Department of Natural Resources the lowest flow that could be expected in a 10-day period is a second. The creek becomes part of the Lake of the Ozarks at the extreme southeast corner of Lake of the Ozarks State Park. Location Mouth Grandglaize Arm of the Lake of the Ozarks, Miller County, Missouri: Source Confluence of Dry Auglaize Creek and Wet Glaize Creek in Camden County, Missouri: Bridge When Bagnell Dam was built to impound the Osage River, it also impounded the creeks which had previously flowed into the river. The Grand Glaize Bridge carried U.S. Highway 54 over what is now the Grand Glaize arm of the lake. The bridge was known as the "Upside-Down Bridge" because the supporting structure was built below the deck to allow for an unobstructed view of the lake. The bridge was infamous for having very narrow lanes, no shoulders, and steel railings as barriers. The bridge was replaced in the 1980s, when a wider bridge was constructed next to it. The new bridge carried Highway 54 and the old bridge was restricted to bicycles and pedestrians. In the 1990s, the original bridge was demolished and replaced with a new bridge to carry two lanes of westbound Highway 54. The 1980s bridge was changed to carry two lanes of eastbound Highway 54. Origin of the name Besides the Lake of the Ozarks creek and the creek near St. Louis there is also an Auglaize River in northwestern Ohio. According to List of Ohio county name etymologies the etymology could be French for eau glaise meaning 'dirty water'