The problem of excessive storm runoff has a lengthy history for the city of Chattanooga, Tennessee. The antiquated water drainage system, which combines the city’s sewer system with its storm drains, poses ongoing challenges for city planners and engineers.
Common in many older municipalities, the simple system does its job until a torrential downpour, which overstrains the capacity of the treatment plant and causes overflow of raw sewage into the Tennessee River, a haven...