The Trump Administration’s new navigable waters rule, which significantly curtails the types of water bodies subject to federal jurisdiction, went into effect in all states but Colorado on June 22 after a federal judge in California rejected an attempt by a group of 17 state attorneys general to temporarily block the rule.
The regulation replaces the Obama-era Waters of the U.S. rule that was contentious among contractors and construction groups because it could have led to the Army Corps of Engineers regulating some temporary streams created after rains or snow, such as roadside ditches.