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List of Figures



History of Oklahoma Highway Bridges

The Historic Bridges of Oklahoma
Steel Truss Bridges
• King Post Pony
• Small Pratt (3 panel) Pony
• Truss Leg Bedstead Pony
• Pratt Pony
• Pratt Half-Hip Pony
• Parker Pony
• Camel Back Pony
• Warren w/ Verticals Pony
• Warren w/ Polygonal Top Chord Pony
• Warren Bedstead Pony
• Double Intersection Warren Pony
• Pratt Through
• Modified Pratt Through
• Parker Through
• Camelback Through
• Modified Parker Through
• Warren Through
• K-Truss
• Deck Truss
• Mixed Truss

Concrete and Stone Bridges
• Concrete Arch
• Rainbow Arch
• Stone Arch






    1910	Logan		42N3000E0860001	  


    1940	LeFlore		40N4580E1600004	  


    1896	Seminole	6744 0850 X	  King Br.


    1911	LeFlore		40E1720N4674002	  Central States Br.
    1911	LeFlore		40N4575E132000	  Central States Br.

  While the Warren through truss never competed in popularity with the Pratt and its many derivatives, a small number of the former type remain in Oklahoma.  The five spans, however, represent a remarkable diversity: bridges with and without verticals, one with subdivided panels, and two double-intersection structures.  Little documentation has surfaced on either the 150-foot Warren through span, fitted with vertical members and connected by pins, which may have been relocated to its present site on the Kiamichi River about 1940 (Figure 65), or the 86-foot rigid-connected standard Warren throughspan, dated in official records as 1910, that crosses a creek near Guthrie.
  From an engineering and historical perspective the other Warren through trusses have a considerable degree of merit.  Moved onto Salt Creek near Maud in 1948, the subdivided Warren through span dates from 1896, making it the state's oldest documented bridge (Figure 66).  Further distinction comes from its builder, the King bridge Company of Cleveland, Ohio, one of the nation's first and most innovative manufacturers of iron and steel pins.  This one seems to have been a railroad bridge, as indicated by its greater height and weight, and perhaps purchased from the Rock Island Line, which ran into the area.  In respect to the double-intersection through trusses, now separated by nearly the entire length of LeFlore County, they once formed a part of the fifteen span, Lexington-Purcell Toll Bridge on the South Canadian River.  The project must have ranked among the biggest ever undertaken by Indiana's Central States Bridge Company which constructed the bridge from angle bars and laced channel and riveted all connections.  The state dismantled it in the 1930s and offered parts to the counties.  In 1940 the Works Progress Administration erected one span on Eagle Creek near Octavia, and a private contractor put up another span south of Bokoshe.  These structures in LeFlore County, approximately two hundred miles away from their original location, nevertheless retain the historical significance of that major bridge, privately financed and operated, which drew attention to the state and symbolized its progress in 1911 (Figure 7 and Figure 67).

Bridge 40N4580E1600004 is a pinned Warren through truss spanning the Kiamichi River in mountainous southeastern Oklahoma.

Figure 65.  Bridge
40N4580E1600004 is a pinned Warren through truss spanning the Kiamichi River in mountainous southeastern Oklahoma.

Figure 66.  The King  
Bridge Company built  
this subdivided Warren  
thru truss for railroad  
service in 1896.  The  
state's oldest recorded  
bridge, Bridge  
6744 0850 X is located  
on SH 9A south of Maud  
in Seminole County.  

The King Bridge Company built this subdivided Warren thru truss for railroad service in 1896.  The state's oldest recorded bridge, Bridge 6744 0850 X is located on SH 9A south of Maud in Seminole County.

Indiana's Vincennes Bridge Company built Bridge 51E0930N4140009 in 1911.  A heavily built, 80-foot Warren pony truss with a polygonal top chord, it spans a creek near Boynton in Muskogee County.

Figure 67.  The distinguishing feature of the double-intersection Warren thru truss is the lattice arrangement of its web members.  Bridge 40N4574E1320002, once part of the impressive Lexington-Purcell Toll Bridge, now crosses Brazil Creek in northern LeFlore County.

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