The Lattice truss, with its many variations, is a common design for both metal and wooden covered bridges. Many of the metal Lattice through truss bridges, which were undoubtedly built by different firms, feature a variety of portal bracing styles.
In Kansas, the most common Lattice truss configuration is the Triple Intersectional Lattice truss. The triple intersectional layout is rare on a national scale. Unlike most Lattice trusses in Kansas, this bridge is a Quadrangular Lattice truss. This is the only known Quadrangular Lattice truss in Kansas, although on a national scale, the Quadrangular layout is much more common than the Triple Intersectional layout.
A few of these bridges, most of them in South Dakota, feature pedimented portal bracing with perforated knee bracing. I have often referred to this design by the phrase "Pedimented and Porforated Portal Bracing.
Jason Smith was able to located a plaque on the Riverdale Park Pedestrian Bridge http://bridgehunter.com/sd/minnehaha/bh36190/ which indicates that the bridge was built by M. Lassig of Chicago, Illinois. M. Lassig was likely associated with the Lassig Bridge and Ironworks, also based in Chicago.