The 100 Cook project site is a five-story, class A medical office building in Denver’s Cherry Creek neighborhood. Dewatering was required to construct the four subgrade parking levels. The bottom of the excavation was approximately 50 feet below grade. The groundwater level began at approximately 30 feet below grade; leaving 20 feet of exposed groundwater table draining into the project excavation. Due to clay layering in the strata, point dewatering was required in the excavation to capture groundwater bypassing the dewatering wells and infiltrating the excavation. Treatment was required for Iron, Manganese, Selenium and Tetrachloroethylene.