SIDNEY, Neb. -- A Sidney office building with more than 100 years in history is the site of a historic find that almost stopped construction.

Jessica McKay and her crew were busy updating the building when the unexpected happened, a chapter that could have stopped work for an undetermined period of time.

"So we were installing some new water lines up into the back addition that's on the building. So we had to drill at an angle through the concrete foundation to get to the access points down below. And, they were drilling and all of the sudden they started pulling bone out," McKay said. 

She said workers removed bone, parts of a liquor bottle, various glass shards, metal, collectively called "junk."

Unsure at first what the bone fragments were, officials were contacted. The work site was cordoned off as a crime scene until authorities could determine what the apparent bone is, animal or human ... and why. In the course of things, McKay received a history lesson as well.

"So what I learned back in that era, they actually used animals, and trash basically, so basically glass, metal, as filler in the concrete," she said.

She said the bones, glass, metal were added to the mix so they wouldn't need as much concrete. She also learned with research of the bone, the bone is animal, not human. Workers are returning to their schedule now that the historic mystery is all but solved.