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This report presents an operational summary for the drilling of a deep scientific corehole at the National Aeronautics and Space Administration's (NASA) Langley Research Center, located at Hampton, Virginia. This corehole is an important research activity of the Chesapeake Bay Impact Crater Project. This project is a multi-agency effort to understand the formative processes, the physical distribution and characteristics, the geologic history, and the hydrologic implications of the Chesapeake Bay impact crater, a major subsurface geologic structure. The Langley corehole is located in the Atlantic Coastal Plain within the boundaries of the buried Chesapeake Bay impact structure. Drilling operations by the USGS began at the Langley Center on July 22, 2000, and were essentially completed with the removal of the drill rig from the work site on October 13, 2000. The borehole was continuously cored to a total depth of 2,083.8 ft, and suites of geophysical logs were run in the hole on three occasions. The corehole penetrated the entire section of materials that fills the impact structure (1,280.4 ft), as well as overlying post-impact Cenozoic sediments (774.3 ft) and a short section of crystalline rocks (29.1 ft) beneath the crater fill. Appendix A of this report lists the main participants in the drilling operations at the Langley Center. Appendix B lists the dates, times, and core-recovery information for the coring runs conducted in the Langley corehole.

Virginia needs a reliable water supply to sustain its growing population and expanding economy. In 1990, the aquifers in the Coastal Plain supplied about 100 million gallons per day (mgd) to the citizens, businesses, and industries of Virginia.