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Chicago's Loop: A New Approach

by Andre Witschi, (M.ASCE), Project Mgr.; Envirodyne Engineers, Inc., Chicago,


Serial Information: Civil Engineering—ASCE, 1990, Vol. 60, Issue 1, Pg. 38-41


Document Type: Feature article

Abstract:

Reconstruction of the Wells St. Viaduct cleaned up a dangerous area just north of Chicago's Loop by providing a structurally sound approach for CTW commuter trains and a column-free street below. Fourteen spans of the 1894 viaduct were reconstructed or replaced. For most spans, a new track structure was built just below the operating track, then raised into place during a weekend closure. Several spans at the north end were demolished and replaced in a single weekend closure. For both types, the new columns were placed outside the old structure, which cleared the full width of the road. The project included reconstruction of the station that serves the Merchandise Mart.

Subject Headings: Viaducts | Construction management | Streets | Project management | Highways and roads | Commute | Chicago | Illinois | United States

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