Why is Stage VIII (Southmoor Road Area) necessary?
The floodwall alignment in the Southmoor area was located closer to the river where ground elevations are lower, in order to minimize impact to existing landscaping and structures. The ground elevation at the base of the floodwall ranges from approximately 594 feet NGVD to approximately 598 feet NGVD. The floodwall averages a height of approximately 4 ft in the Southmoor area with a maximum height of approximately 7 feet near Hohman Avenue due to the lower ground elevation. The floodwall extends 24 feet below the crest in the Southmoor area. The length of sheet pile below grade was designed to insure the structural stability necessary to withstand the pressure of flood waters to the top of the wall. Several members of the Chicago Districts Staff met with Dr. Roy Evans (Independent Engineer representing the Southmoor Area) on July 11, 2008 to answer questions and address his concerns. A set of the Stage VIII final plans and a copy of the Feature Design Memorandum 5, which was the basis
