Groups Ask for Extension on Comment Period for Grand Canyon "Natural Quiet" Definition
A coalition of groups has asked that the public comment period on how "natural quiet" is defined at Grand Canyon National Park be extended by 30 days beyond the current May 9 deadline.
4.9.08 Clarification of definition on natural quiet.pdf 1987 National Parks Overflight Act.pdf GRCA comment period leter 5-1-08.pdf