WATER AND WASTEWATER TREATMENT PLANT UPGRADES, NACOGDOCHES, TX. BLOC Design-Build was selected to provide water and wastewater treatment plant improvements under a design-build delivery method. The firm designed and installed water system controls with remote control, full automation, and monitoring capability of six wells, five booster pump stations, three elevated storage tanks, a wastewater treatment plant, and surface water treatment plant. The team also provided controls for numerous other sites that were engineered.