The museum’s Poison Creek Quarry in Johnson County, Wyoming yielded a number of Jurassic dinosaurs including Diplodocus. This is one of the great long-neck, long-tail, sauropods which required seasonal excavations from 1977-1990. During this period over 15 tons of crated dinosaur bones were shipped back to the museum from the Wyoming site. Other sauropod dinosaurs collected at Poison Creek are complete or partly complete skeletons of two Haplocanthosaurus, Apatosaurus (Brontosaurus), and Camarasaurus, in addition to two specimens of the Iguanodont Camptosaurus.

Poison Creek Quarry became a full-time commitment for me involving some 60 students, volunteers and staff. Eventual assembly of the Diplodocus skeleton was a major task completed!
– Bruce R. Erickson, Fitzpatrick Chair of Paleontology