What is the portable building covering your excavation site?

Protected area for investigation (Courtesy David Bush)

David Bush: The structure that we excavate under is heavy canvas made by Hanson, 30 by 50 feet and quite durable. It's a lifesaver when it comes to working in the field for extended periods of time. We couldn't run our program for schools without this type of protection. If you are interested in how sites get covered, you should see the one that the Jamestown Rediscovery uses. Now that is protective structure!