PRAIRIE DU CHIEN, WI (AP) -

A lawsuit filed in Crawford County attempts to block a frack sand mine planned for a pristine area east of the Mississippi River near the Iowa border.

An environmental group, the Crawford Stewardship Project, and neighbors of the mine are asking the court to void two permits granted by the Town of Bridgeport because two members of the local planning commission have a conflict of interest. The lawsuit alleges the commissioners had family working for the company building the mine, Pattison Sand.

The Journal Sentinel reports the lawsuit also says zoning ordinances were violated because the town did not consider any negative effects of the project. The mine would be located partially on land that is protected for its natural beauty.

There are about 100 frack sand mines in Wisconsin.