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 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…

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 denies an electric utility and trade association coalition's motion to intervene in mediation leading to and subsequent enforcement of an amended consent decree between the U.S.…

The court reverses a district court decision and holds that a group of developers may intervene as of right in a suit brought by environmental groups against a city and against local, state, and…

The court holds that a city and county have standing to challenge the U.S. Department of the Interior (DOI) for implementing a water rights acquisition plan in Nevada before preparing a…

The court affirms a district court order directing the U.S. government to release, under §2001(k)(1) of the Fiscal Year 1995 Emergency Supplemental Appropriations for Disaster Relief and…

The court holds that Arizona and an Arizona county may intervene as of right in the injunctive relief portion of an action alleging that the U.S. Forest Service (Forest Service) violated the…

The court holds that landowners, timber companies, and a sport fisherman guide may not intervene in an environmental group's action to compel the U.S. Fish and Wildlife Service (FWS) to list…

The court holds that environmental groups may not intervene in a district court's review of the U.S. Environmental Protection Agency's (EPA's or the Agency's) veto of a dredge…