Environmental sensitivity maps in the Great Lakes were last updated in the late 1980s and early 1990s.
A bipartisan bill in the U.S. Senate could change that.
The bill, introduced by Democrat Sen. Gary Peters of Michigan and Republican Todd Young of Indiana, seeks "to better address habitat restoration and potential ecological impacts in the event of an oil spill or natural disaster."
It would require federal officials to periodically update maps for each coastal area in the Great Lakes and make them more accessible in a variety of formats.
The maps detail Great Lakes' coastline resources that could impacted by a disaster like endangered species, sensitive habitats as well as beaches, parks and boat ramps.
Peters said maps of the East Coast, West Coast and Gulf Coast have been updated in the past five years.