Dodd's Creek Bridge
Salado, Bell County, Texas
Marker Inscription
(Lenticular Truss Bridge) One of many patented truss designs developed by American inventors and engineers in the mid- to late-19th century, this 87-foot lenticular truss bridge represents an unusual truss type in the United States. The lenticular design features a curved top and bottom chord which forms a lens shape. The patent, issued to William O. Douglas of Connecticut in 1878, was the only one given for a lenticular truss bridge in the United States. Most were constructed in the New England area and in New York state. Through the efforts of William Payson, a salesman for Douglas' Berlin Iron Bridge Company, Texas acquired at least a dozen truss bridges in the late 19th century. The Coryell County Commissioners Court contracted with the Berlin Iron Bridge Company to build four lenticular truss bridges for $16,500 in 1889. This bridge originally was located across Cowhouse Creek and later was moved to Dodd's Creek. In 1990 the Texas Historical Commission and the Texas Department of Transportation identified eight lenticular truss bridges surviving in Texas. Four of the spans were located in San Antonio; the other four were positioned on out-of-service roadways. The only examples of this rare bridge type west of the Mississippi, they are recognized as historically significant engineering structures. The Society for Industrial Archeology and Historic American Engineering Record, a branch of the National Park Service, also have recognized the importance of the Texas lenticular bridges as products of a short-lived but important period of bridge technology in 19th century engineering history. The Dodd's Creek bridge was moved to this site in 1997 to improve the flow of traffic, protect pedestrians and enhance the Salado Historic District. (2000)
Erected by Texas Historical Commission
The Story
This 87-foot lenticular truss bridge, its curved top and bottom chords forming a lens shape, embodies a rare American bridge type patented by Connecticut's William O. Douglas in 1878. Through salesman William Payson, the Berlin Iron Bridge Company sold at least a dozen such spans to Texas, and this one—first built over Cowhouse Creek—was among four the Coryell County court ordered in 1889. Recognized as one of the few lenticular bridges west of the Mississippi, it was relocated to Dodd's Creek in 1997 to ease traffic and enhance the Salado Historic District.
Why it matters
The bridge is a rare survivor from a brief but pivotal chapter in nineteenth-century American engineering, when patented iron trusses reshaped how the country crossed its rivers.
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Related people
- · William O. Douglas
- · William Payson
Themes & tags
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