Garfield Avenue Bridge Replacement

Challenge

The City of Dell Rapids, South Dakota, is defined in part by its scenic setting along the Big Sioux River, where a historic 1929 bridge served as both a transportation link and a backdrop to the city park. Originally constructed by the State Highway Commission, the rib arch bridge with open baluster railings had long since deteriorated and no longer met the functional or safety needs of the community. While the structure remained a local landmark, its condition posed increasing maintenance concerns and limitations for modern traffic demands.

City leaders sought a solution that would replace the aging structure while preserving its historic character and visual importance to the community. The challenge was not only to deliver a safe and reliable crossing, but also to respect the bridge’s role as a recognizable feature within Dell Rapids’ identity and park setting.

Solution

SEH worked closely with the City of Dell Rapids and the South Dakota Department of Transportation to develop a bridge solution that balanced modern engineering requirements with community expectations for aesthetics and character. Early in the process, multiple design concepts were prepared, ranging from contemporary to more traditional styles. This allowed stakeholders to evaluate options and align on a design approach that honored the historic qualities of the original structure while meeting current standards.

The selected design incorporated a modern structural system with architectural elements inspired by the original bridge. Distinctive features included arched valance elements and an open concrete railing that reflected the historic baluster style. Because these elements were nonstandard for typical bridge design, SEH coordinated closely with state agencies to secure approval, ensuring that the final design achieved both safety compliance and aesthetic goals.

From a structural standpoint, the project replaced the existing three-span, 98-foot steel through truss bridge with a four-span, 302-foot prestressed concrete girder bridge. The new structure provides a 30-foot roadway to better accommodate vehicular traffic, along with an 8-foot raised sidewalk on the east side to improve pedestrian access and safety. These upgrades enhance the bridge’s functionality while supporting increased use by both vehicles and pedestrians.

The completed bridge delivers long-term reliability and reduced maintenance needs while preserving the visual connection to the original landmark. By integrating decorative fascia, arched valances, and ornamental railing details, the new crossing continues to serve as a defining feature within the park and community. The result is a structure that meets modern infrastructure demands while maintaining a strong sense of place for Dell Rapids residents and visitors.

Awards

• 2015 “People's Choice” Award | South Dakota Engineering Society – Eastern Chapter (SDES)