Huerfano Bridge is a historic concrete filled-spandrel arch bridge in Pueblo County, Colorado. Built in 1921, the bridge carries US 50 over the Huerfano River and is one of the most significant surviving historic roadway arch bridges in the state. It is listed in the National Register of Historic Places and has been identified as one of the preservation-priority bridges in the Historic Bridges of Colorado effort.
The bridge is important both for its engineering and for its transportation history. Located along US 50, Huerfano Bridge is associated with a major east-west travel corridor across southern Colorado. This route also follows the broader historic geography of the Santa Fe Trail corridor, one of the most important overland trade and travel routes in the American West. As roads and highways replaced earlier trails and wagon routes, crossings like Huerfano Bridge helped modernize travel through the Arkansas Valley and southeastern Colorado.
Huerfano Bridge is a reinforced concrete filled-spandrel arch bridge. In this type of bridge, the arch supports a solid, filled area between the arch ring and the roadway deck. Unlike an open-spandrel arch, where vertical members visibly connect the arch to the deck, a filled-spandrel arch presents a more solid appearance. The form is visually substantial, structurally efficient, and closely associated with early twentieth-century concrete bridge construction.
The bridge is especially notable because it is recognized as the longest filled-spandrel arch bridge for roadway use in Colorado. Its scale distinguishes it from smaller concrete arch bridges and gives it a strong visual presence along US 50. The bridge’s long, multi-span form reflects the Colorado Highway Department’s early use of reinforced concrete for major highway crossings before later bridge designs shifted toward more standardized girder, slab, and beam structures.
Huerfano Bridge was listed in the National Register of Historic Places for its transportation and engineering significance. Its transportation significance comes from its role as an important crossing on a major highway route in southern Colorado. Its engineering significance comes from its early, rare, and intact example of a standard concrete arch design used by the Colorado Highway Department. The bridge’s reinforced, filled-spandrel concrete arch superstructure is its primary character-defining feature.
The bridge also retains original doghouse-style concrete railings, a Colorado Highway Department standard railing design used during this period. These railings contribute to the bridge’s historic character and help communicate its early twentieth-century design. Together, the filled-spandrel arches and original railings make Huerfano Bridge a strong representative of Colorado’s early highway bridge architecture.
As part of the Historic Bridges of Colorado preservation effort, Huerfano Bridge has been identified as a preservation-priority bridge. CDOT selected the bridge for Group B, recommending development of an individual bridge management plan because it is an early, rare, and intact example of its type. That recommendation recognizes both the bridge’s engineering significance and the need for long-term preservation planning.
Preserving Huerfano Bridge requires careful attention to its historic concrete, original railing system, roadway function, and setting along an active highway corridor. Like many historic bridges still carrying traffic, Huerfano Bridge must be managed in a way that balances safety, maintenance, and historic integrity. Its status as a major concrete arch bridge also means that preservation solutions may require specialized repair approaches rather than routine replacement.
The bridge’s continued presence is important because it represents a major phase in Colorado’s transportation history. Huerfano Bridge reflects the early automobile era, when the state was transforming older travel corridors into engineered highways capable of carrying modern traffic. Its concrete arch design also demonstrates the confidence engineers placed in reinforced concrete as a durable and visually substantial bridge material.
Huerfano Bridge helps tell a broader story about Colorado’s historic bridges. It connects the history of early travel corridors, highway modernization, and concrete bridge engineering in one highly visible resource. As the longest roadway filled-spandrel arch bridge in Colorado, it is more than a functional crossing; it is a landmark in the state’s transportation and engineering heritage.
This bridge is one of the 23 preservation-priority bridges featured in Colorado Preservation, Inc.’s Historic Bridges of Colorado listing. View the full Historic Bridges of Colorado overview to learn more about the statewide preservation effort.