The Cedar Bayou watershed has a known history of flooding, with several noteworthy rainfall events resulting in more than $13M in damages since the late 1970’s. The watershed has experienced several significant flooding events, including storms in June 1979, June 1981, August 1983 (Hurricane Alicia), May 1989, October 1994 (worst on record), June 2001 (Tropical Storm Allison), September 2008 (Hurricane Ike), April 2009, and October 2015. After the Halloween 2015 flooding, the Harris County Flood Control District chose Cedar Bayou for a planning study. Recent rainfall events have resulted in additional damages, with rainfall totals and stream elevations reaching 100-year levels in parts of the watershed. This flooding has resulted from a combination of riverine overflow from Cedar Bayou and its tributaries, and coastal storm surge from Galveston Bay, where Cedar Bayou empties. Numerous smaller storms have forced Cedar Bayou out of its banks and caused isolated damages and roadway flooding, which disrupts the roadway network and limits mobility in the watershed.