EDWIN is the well information system maintained by the Pennsylvania Geological Survey. Archived images of oil and gas well records, geophysical logs, location plats and plugging certificates can be viewed. Use of EDWIN is free when accessed onsite at the Survey's Middletown or Pittsburg offices. You can also access the system through the Penn State Marcellus Center for Outreach and Research. More information about is available at the state Oil and Gas webpage.