Between 2002 and 2005, archaeologists conducted several digs at Letchworth-Love Mounds Archaeological State Park to learn about the architecture and cultures that once thrived there. They established a grid with square concrete markers placed every 100 meters and assigned a number to each square to record each artifact's location. They conducted a topographic survey to determine exactly where the mounds were located, then used auger tests drilled into the ground every 20 meters to obtain samples of soil and artifacts. Screening the soil from the auger bits separated the soil from solid objects, and shovel tests followed in areas where screening showed heavier concentrations of artifacts. Most recovered artifacts were stone tools and pottery, and almost all dated to the Weeden Island period, leading archaeologists to link the visible architecture with that culture. Ground penetrating radar also allowed them to see beneath the ground without moving soil, as electromagnetic waves passed through the ground and bounced back to the surface to create a map of what lay below.