The Sierra Club filed suit on Wednesday to stop a big development project proposed for a gateway community south of Grand Canyon National Park. “Building Northern Arizona’s largest shopping center at the entrance to the Grand Canyon is simply a bad idea,” said Sharon Galbreath of the Sierra Club. The group contends that the U.S. Forest Service should not have signed off on the Canyon Forest Village development until the builder made good on promises not to use groundwater that might flow into the Grand Canyon. The $330 million development project — which would include up to 1,140 hotel rooms, 2,375 housing units, and 250,000 square feet of commercial space — would be at the main entry point to the park. Several nearby landowners and communities filed suit previously to stop the project.