COLUMBUS, Ohio (WTVN) -- The Ohio Department of Transportation has spent another $2 million to buy more road salt. It has been a costly winter.

"We have spent about $116 million to keep our roads safe and clear for the traveling public and have used more than a million tons of salt," said ODOT spokesman Steve Faulkner. "We believe both of those are record-breakers for us."

The state controlling board on Monday granted the request to buy about 30,000 tons of salt from Cargill De-icing Technology Inc. and Morton Salt Inc. Documents show the state is paying about $73.88 per ton for 20,000 tons from Cargill, and $56.75 a ton for another 10,000 tons from Morton.

"As you get into winter and you're knee-deep - literally - in snow and you need some extra salt it's going to come at a premium. That's the law of supply and demand," Faulkner said.

The transportation department has had to go before the board repeatedly this winter to request money for more salt.

Some of the extra salt will go to local communities that have salt supplies that are running low or are already gone.

"We want to make sure that we're prepared and we'd rather be safe than sorry," said Faulkner.

ODOT started off the winter this year with 627,000 tons of salt in their barns. He says they plan for the worst-case scenario and this year they saw it.