SCHUYLKILL PERMANENT BRIDGE. 79 



SOUTHERN TABLET. 



Dimensions 



of the 



BRIDGE. 



Length 550 feet. 



Abutments 



and wings 750 



Total — 1300. 



Span of smaller arches each 150. 



of middle arch, 194 feet 10 inches 



Width of the Bridge — 42. 



Curvature of the middle arch, 12. 



of the smaller arches 10. 



The Curves are Catenarian, 



Rise 



of the Carriage way — 8 feet. 



Height^ 



over the platform, to the 



Cross ties — 13. 



From the surface of the 



River to the platform, 



in the greatest elevation, 31. 



Elevated 



above all Floods 



ever known 



In this River, 



Inclined Plane to Entrances ; 3 1-2 Degrees. 



