River des Peres
The River des Peres (French: rivière des Pères) (English pronunciation: /diˈpɛər/) is a 9.3-mile (15.0 km) metropolitan river in St. Louis, Missouri. It is the backbone of sanitary and storm water systems in the city of St. Louis and portions of St. Louis County. Its largest tributaries are Deer Creek and Gravois Creek.
The name, meaning "River of the Fathers," is of French origin, and was given by locals because a mission of Jesuit Catholic priests resided near the confluence of the river with the Mississippi. The priests were established in 1700 and soon moved south in 1703 to Kaskaskia, probably as a result of conflict with American Indians, roughly 60 years before the founding of St. Louis. There is also a city of the same name, located in west St. Louis County.
In preparation for the 1904 World's Fair, the portion of the river that flows through Forest Park was disguised by temporary wooden channels. Shortly thereafter, that portion was placed entirely underground.
The River des Peres has functioned as a combined sanitary sewer and storm drain for over 100 years. In the early 1930s, following high demand for preventive safety measures brought on by a series of fatal floods, the river was channelized, with its upper sections redirected underground in large sewage pipes. Design and construction was led by the United States Army Corps of Engineers, Horner & Shifrin, and the Works Progress Administration. The lower banks of the river, most notably along Willmore Park and the River des Peres Greenway, were lined with quarried limestone, producing a distinct landmark for decades to come. "Safety First / W.P.A." is written in mosaics along the eastern banks.
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