KCA designed 5.2 miles of four-lane expressway traversing through extremely sensitive environmental areas, impacting over 28 wetland areas and a 2,000 ft. wide regulated flood way. The project included a directional interchange, a mainline barrier toll plaza, two ramp plazas, and bridges at six sites. The Saddle Creek floodway and residual slime material from phosphate mining activities required twin 1,500 ft. long bridges to be designed to span the weak soil conditions. At other locations, ground reinforcement was combined with wick drains and embankment surcharges to increase settlement rates. The project was drainage intensive including 8 on-line wet detention ponds, one pond being approximately 25 acres and involving draining of approximately 337 acres. Polk Parkway alignment fell within the 100-year floodplain of Saddle Creek, which has a 4,000 ft. wide floodplain and a 2,000 ft. wide regulated floodway. Extensive communication with federal, state, and local government agencies (FEMA, Florida DOE, SWFWMD, Polk County) to coordinate and approve permitting, drainage, utility adjustments, and traffic control during construction was paramount.