Scientists have just made an incredible and very rare find of a dinosaur skeleton at a construction site in Denver. A construction crew that was working on a new public safety facility in the city of Thornton, a Denver suburb, discovered some discolored dirt recently, which piqued the interest of Dr. Joe Sertich, the Curator of Dinosaurs at the Denver Museum of Nature and Science.

Sertich spends most of his time looking for fossils in North Dakota, so it was quite exciting to see a dinosaur fossil – in this case, the fourth triceratops found around Denver – uncovered closer to home. He praised the “sharp eye” of one worker for realizing that there was something unusual about the situation, according to a CBS Local Denver report.

Scientists will spend the next few days trying to dig up as many bones as they can. They’ve found a skull and a few other bones so far, but right now they remain in the ground. Scientists are hopeful to see other parts of the skull or the frill, and perhaps more parts to the body.

“There could be a lot more of the skeleton at the site,” Sertich said according to the CBS Local report.

Once the bones have been extracted, they will be cast in plaster and burlap so they can sent to the lab where they will be completely cleaned and preserved.