[Watch in the player above: The worst commutes in the U.S.] COLUMBUS, Ohio (WKBN) -- Ohio's attorney general is suing a major U.S. company for $17 million over what he says are unmaintained sinkholes in the state. The lawsuit was filed Monday on behalf of the Ohio Department of Transportation against the United States Gypsum Company, specifically in connection to sinkholes near state Route 2 in Ottawa County. Attorney General Dave Yost said the sinkholes are dangerous and threatening the roadway's stability. SEE IT: Cedar Point in repose atop frozen Lake Erie Yost said the case dates back to 1965 when the company sold the land to ODOT to build state Route 2 above the company's underground mines. The purchase agreement required the company to maintain the integrity of the mines to ensure the highway's stability. A quit claim deed filed in 1977 by the company included the withdrawal of its commitment to maintain the mines, but ODOT was not notified about that filing, Yost said. Decades later, Route 2 developed into a main road to get to Cedar Point and Kelley's Island. The company continued discussions with ODOT about the problems and possible solutions, but in the early 2000s, Yost said the company filed paperwork to legally cease its offer to monitor the highway. In 2013, ODOT invested $20 million in the roadway and to stabilize nearby company mines. The $17 million that Yost is suing for is related to the mine stabilization costs. Unclaimed stimulus payments to hit accounts soon: IRS The case has not been recorded in online court records for Ottawa County, and a response from the company has not been entered as of this report. U.S. Gypsum manufactures construction materials, including drywall and joint compounds. Wallboard and plaster products are manufactured using mined gypsum.