In 2002, Dutchland designed and constructed a precast post-tensioned tank as part of the overall facility upgrade at the Dutoy Creek WWTP in Powhatan County, VA. Since the initial flows coming into the plant were anticipated to be around 10,000 gpd but eventually grow to the full design flow of 250,000 gpd, designing a structure to meet these changing flows proved challenging.

Dutchland addressed the changing flows by designing a tank with temporary precast walls in two of the four large reactor basins. These walls could then be removed when higher flows demanded that all four basins be put into service. The temporary walls were designed to be removed without any structural modifications to the overall tank illustrating the versatility of precast post-tensioned tank construction. The temporary precast walls can be removed within a single day to minimize disruption to plant operations.