. The street railway review . •*^^^^* FIO. 1. SIDE VIEW AND SECTION OF CI,.\.RK STREET VIADUCT. danger. Elaborate plans were made for elevating and depressingthe railroad tracks, and a viaduct was designed for the car linesand on Clark street. The grade on Clark street was raised to pass over the depressedrailroad tracks and lowered beneath the elevated tracks of theSt. Charles Air Line. This latter elevation necessitated theraising of the structure of the South Side Elevated RailroadCompany, 2% squares east of Clark street. On Clark street a4% per cent grade begins about loth street
. The street railway review . •*^^^^* FIO. 1. SIDE VIEW AND SECTION OF CI,.\.RK STREET VIADUCT. danger. Elaborate plans were made for elevating and depressingthe railroad tracks, and a viaduct was designed for the car linesand on Clark street. The grade on Clark street was raised to pass over the depressedrailroad tracks and lowered beneath the elevated tracks of theSt. Charles Air Line. This latter elevation necessitated theraising of the structure of the South Side Elevated RailroadCompany, 2% squares east of Clark street. On Clark street a4% per cent grade begins about loth street and extends to theviaduct over an open cut through which six railroad tracks the viaduct the roadway descends at a grade of 5 percent and passes under the St. Charles .\ir Line bridge, a clear-ance of 13I2 ft. being left for the electric FIG. 2. VIEW OF VIADUCT. In Fig. 1 Is a side view of the structure and a cross secUonof the viaduct, showing the relative space given to the tracks and walk for pedestrians. The structure is of steeland is 80 ft. wide. On the west side, separated from the by a concrete wall, is the right of way of the street carcompany, 26 ft. wide. In the center is a 42-ft. roadway and onthe east side is a 12-ft. sidewalk. The street car tracks are laid with a grooved girder rail withgranite paving between, but on the approaches to the viaductbroken stone is tilled in between the tracks to prevent the rightof way being used for teaming purposes. Alx)Ut two years ago the Chicago City Railway Company paid?85,000 into the city treasury, after securing a franchise onClark street, with the understanding that this sum should go .V valuable paper was read by Erast J. Berg before the Ameri-can Institute of Electrical Engineers d.:aling mathematically withsome of the troublesome problems
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
