Further excavations occurred in the early 19th century when amateur St. Louis paleontologist C.W. Beehler found several fossils including skulls, jaws, teeth, and tusks. However, he did not carefully record his findings so he failed to make the connection between the artifacts and the fossils. In the coming years, the site suffered from non-scientific digs and people simply selling or giving away fossils. A quarry also operated at the site from 1870s to the 1930s.
In the early 1970s, the construction of I-55 threatened the site, prompting calls for its protection. As a result, the Missouri Department of Natural Resources bought 418-acres including the fossil bed and designated it a state historic site. Excavations got underway again in 1979. As stated above, it was at this point that the Clovis points were discovered. Other excavations occurred in 1980 and 1984. It appears that no other excavations have taken place since then.