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The Locks, Sault St. Marie, Mich.
Morris Canal, Phillipsburg, Warren County, NJ
The Locks, Sault St. Marie, Mich
Sergei Prokudin Gorskiy, Kamnecherpatelʹnai︠a︡ mashina mnogocherpakovago tipa Svirskai︠a︡ pervai︠a︡. Rossiĭskai︠a︡ imperii︠a︡, color separation negative
Residence of R.B. Woodward, San Francisco--The Lake
Related
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Chicago, Milwaukee & St. Paul Railway, Bridge No. Z-6, Spanning North Branch of Chicago River, South of Cortland Street, Chicago, Cook County, IL
Summary
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 the constraints of a small site on a bend in the river. The 175'-2"-long plate-girder span bears on a short segment of roller nest turning at one-half the span's rate. This is accomplished by an unusual drive mechanism with two parallel racks. As a result, the roller nest need only turn through an arc equivalent to half of the span's rotation, reducing the bridge's footprint accordingly.
Unprocessed Field note material exists for this structure: N652
Unprocessed Field note material exists for this structure: N967
Survey number: HAER IL-162
Building/structure dates: 1898-1899 Initial Construction
Nothing Found.