Are Non-Navigable Waters Covered By the Clean Water Act?

I'm trying to follow a series of court cases and Ohio state laws that could have a big impact on the future regulation of Ohio's navigable and non-navigable water ways.  Strictly interpreted, the CWA only covers navigable U.S. waterways.  At issue are two Supreme Court cases--Rapanos v. U.S. and Carabell v. U.S.--that ask the Supreme Court to decide whether the Clean Water Act extends into tributaries and wetlands that flow into navigable waterways.  At the same time, three Ohio state senators have introduced legislation to hold state environmental standards at federal limits--call us AntiCali.  An odd coalition of advocacy groups, sportspersons and businesses are banding together to fight the legislation.  If passed, many current regulations on Ohio wetlands would be rendered ineffective.  Here's the full story from the Columbus Dispatch.