The largest impact structure in the United States, 85 kilometers (km) in diameter, was discovered under Chesapeake Bay, centered near the small town of Cape Charles on the eastern shore of Virginia. Evidence that the feature is an impact structure includes shocked quartz, concentric normal faults, gravity anomalies, and the presence of tektites. The Chesapeake Bay impact structure cuts through 1 to 2 km of sedimentary rock classified by uniformitarian scientists as Mesozoic to Eocene and is covered by hundreds of meters (m) of other mid- to late-Cenozoic strata, including the Exmore breccia. The impact likely occurred in water on the continental shelf. >From an evolutionary perspective, the crater is dated at 35.5 million years, or late Eocene, but there is evidence that the impact was much more recent. We address the relationship of this impact to the Creation-Flood model, and conclude that the impact occurred during the Abative Phase of the Recessional Stage of the Flood, the mid- to late-Flood, according to Walker's biblical geological model.