HLM's architectural plan for the project is called "Intervention at the Seam," which according to the firm, acknowledges the "seam" between states, between functions, between man-made and natural materials, and between the past and the present.
A 14-foot-high tower, clad in Texas limestone, stands at the front of the building. This feature was designed to balance the reduced scale of the entry building. It also pays tribute to the light-colored mounds that historically served as gathering points for the Caddo Indians, which had built temples on top of the mounds years ago.