The centerpiece of the eleven-acre Waterloo Greenway revitalization is the open-air theater designed by Thomas Phifer and Partners. The elaborate steel lattice is complimented by raw concrete to retain an “earthen” feel while delivering a first-class entertainment experience. The curves of concrete appear to mimic the meandering Waller Creek, while providing structural support and a focal point to the center stage. During construction it became clear that the appearance of the concrete was not acceptable, and a mineral stain strategy was developed with the help of Keim to execute a subtle “camouflage” of the mismatched concrete and repairs. The primary goal of retaining the gritty and raw nature of the concrete was the drove both product and color selection.