MERRILL (WAOW) -- Lincoln Windows in Merrill is dealing with a special kind of cleanup after Sunday's high winds.
The tornado collapsed a side of Lincoln Windows' building.
The collapsed wall broke the sprinkler system, filling the basement with about 18 inches of water.
K-Tech General Manager Mike Fisher says flooding damaged tens of thousands of documents.
K-Tech Kleening systems is in charge of drying the basement, but its other goal is to save those damaged documents.
"Anybody can clean the facility. But the key is saving the documentation that's their history," Fisher said. "That's everything from their sales, to their accounting, their financial statements, those kind of things."
The Lincoln Windows' national sales manager says he expects employees to be back at work in the next two to three weeks.