COVINGTON, La. (AP) — The Louisiana Geological Survey has rendered invalid Helis Oil & Gas Co.’s application for an Army Corps of Engineers’ wetlands permit for its proposed oil drilling and fracking project near Mandeville. The move means Helis must submit a revised application for which the public comment period would begin anew.

Corps spokesman Rene Poche told NOLA.com/The Times-Picayune (http://bit.ly/1sbUIRP) Helis will have to show the Geological Survey that the drill site will be productive for oil development. The agency reviewed the permit application to determine the geological suitability for the proposed drilling, Poche said.