The 4th Street Bridge crosses a small city street, the vast Pueblo Railroad Yard, and the Arkansas River. The 1,137’ long twin, cast-in-place concrete segmental bridges were built from above, allowing for uninterrupted railyard operations below. The bridge features five spans, the longest of which is 378’, a record for the longest highway bridge span in the state. A major theme of “Natural Environment” and minor themes of “Contemporary Sculpture” and “Pueblo Heritage” were chosen by charette participants to guide the development of aesthetic bridge features.