A district court granted environmental groups' motion to intervene in a landowner's lawsuit challenging FWS' critical habitat designation for the dusky gopher frog in portions of…

A district court held that a property owner that filed a RCRA, CAA, and CWA citizen suit against a mine may not intervene in the United States' and Missouri's enforcement action against…

The Tenth Circuit affirmed a lower court’s denial of environmental groups’ motion to intervene in a county action against the United States to quiet title to several purported…

The Tenth Circuit reversed a lower court decision denying a railroad company's motion to intervene in the United State's CERCLA §107 action against 44 PRPs concerning a hazardous waste…

The Tenth Circuit held that the owner of an underground coal mine may intervene in an environmental group's NEPA action concerning the U.S. Forest Service's approval of venting of…

The Eighth Circuit affirmed a lower court decision denying a business trade association's motion to intervene in a CWA enforcement action filed against a local sewer district by Missouri and…

A district court held that a nonsettling potentially responsible party (PRP) may intervene in a consent decree between the United States and settling PRPs concerning the reimbursement of response…

The court grants a local water authority's motion to intervene in a case brought by environmental groups challenging the validity of the U.S. Fish and Wildlife Service's biological…

A court denies motions to intervene and set aside a consent decree concerning the cleanup and restoration of contaminated groundwater. The motion to intervene was filed 10 years after the consent…

The court reverses a district court judgment denying Florida's and a hydropower company's motions to intervene as defendants in Georgia's lawsuit against the U.S. Army Corps of…