Minnesota's frac sand mining rules already outweigh Wisconsin's

Doug Losee can sum up the differences between Minnesota's and Wisconsin's frac sand mining regulations by describing how much room the two states' environmental studies take up in his office.

"The Minnesota files really take up a bookcase. And for the most part, Wisconsin I can fit in filing cabinet," said Losee, who oversees environmental regulations for Mankato-based Unimin Corp.'s sand mines in Minnesota and Wisconsin.

Read more at Minnesota Public Radio.