Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
Significance: The Chicago Skyway Toll Bridge system crosses the Calumet River on a 650'-0"-long cantilever Warren through truss. This is Chicago's highest and longest bridge, and perhaps more importantly, its More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
See also HAER IL-161 for additional documentation. Significance: The Pittsburgh, Fort Wayne & Chicago Railway's two parallel vertical-lift spans over the Calumet River (of which one survives), and two neighbori More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: Designated a landmark by the American Society of Civil Engineers, the Cortland Street Bridge is a double-leaf bascule span that became in the early twentieth century the standard for movable bridg More
Significance: The Kinzie Street Bridge occupies the site of Chicago's first railroad bridge (1852), and also the nation's first all-steel railroad bridge (1879). The line served Wells Street Station and indust More
Significance: The Kinzie Street Bridge occupies the site of Chicago's first railroad bridge (1852), and also the nation's first all-steel railroad bridge (1879). The line served Wells Street Station and indust More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: When Chicago became a major commercial and industrial center after the Civil War, the most common American drawbridge was the swing bridge, horizontally rotating on a center pier to open two navig More
Significance: The development of the Chicago trunnion bascule bridge occurred during the first three decades of the twentieth century. Despite the controversy over patent infringement Joseph E. Strauss charg More
Significance: The development of the Chicago trunnion bascule bridge occurred during the first three decades of the twentieth century. Despite the controversy over patent infringement Joseph E. Strauss charg More
Significance: The development of the Chicago trunnion bascule bridge occurred during the first three decades of the twentieth century. Despite the controversy over patent infringement Joseph E. Strauss charg More
Significance: The development of the Chicago trunnion bascule bridge occurred during the first three decades of the twentieth century. Despite the controversy over patent infringement Joseph E. Strauss charg More
Significance: The development of the Chicago trunnion bascule bridge occurred during the first three decades of the twentieth century. Despite the controversy over patent infringement Joseph E. Strauss charg More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More
Significance: The Milwaukee Road's Bridge No. Z-6 may be the only one of its kind ever built, defying the conventional categories of center-bearing and rim-bearing swing bridges. This ingenious design answers More