311 South Wacker Drive

311 South Wacker Drive
Record height
Tallest in Wacker Drive from 1990 to 1992[I]
Preceded by	35 East Wacker Drive
Surpassed by	77 West Wacker Drive
General information
Status	Completed
Type	Office
Location	311 S. Wacker Drive Chicago, Illinois
Construction started	1988
Completed	1990
Height
Architectural	292.9 m (961 ft)[1]
Roof	293 m (961 ft)
Top floor	256.8 m (843 ft)[1]
Technical details
Floor count	65[1]
Floor area	1,400,000 sq ft (130,000 m2)[2]
Lifts/elevators	34[1]
Design and construction
Architect(s)	Kohn Pedersen Fox Associates HKS
Developer	Gerald Kostelny/Lincoln Property Company
Main contractor	J.A. Jones Construction Construction Manager was Harbour Contractors, inc.
References
[1]

311 South Wacker Drive is a post-modern 65-story skyscraper located in Chicago, Illinois, and completed in 1990. At 961 feet (293 m) tall, it is the ninth-tallest building in Chicago and the 36th tallest in the United States. It was once the tallest reinforced concrete building in the world. 311 South Wacker was also the tallest building in the world known only by its street address, until it was surpassed in height by New York's 432 Park Avenue in 2015.^[3][4]

The lower level of the winter garden was designed for a possible connection via underground passageway to Chicago Union Station. The building also contains three levels of underground parking. The building contains both retail and commercial tenants.^[5]