Cedar Hill Citizen Has Great Memories of 25 Years With Cedar Hill ISD “Digging Up” Memories Of A 25 Year Career (CEDAR HILL, TEXAS) The “Super Collider”, the Ellis County-based greatest project that never was, did bring some positive developments to North Texas in the early 1990s. That’s when a married couple of archaeologists – Joseph and Nancy Yedlowski – moved to the region, so Joseph could work on an archaeological study before the project proceeded. The United States Congress decided not to fund the program – which would send and split atoms through a large tunnel. But the Yedlowskis and their three young daughters were already in North Texas, so they purchased a home in Cedar Hill in 1994. Joseph continued working as an archaeologist.