The National Law review has written some clarifying articles about the new Clean Water Rule newly issued by the EPA, with its background and potential impact. Worth a read.
What’s a Wetland?: The Final Waters of the US Rule
The Practical Application of the Significant Nexus Test: The Final Waters of the US Rule
Traditionally Navigable Waters and the Possibility of Future Use: The Final Waters of the US Rule
EPA, Army Corps Redefine Clean Water Act Jurisdiction