480 U.S. 572 (1987)
California Coastal Commission v. Granite Rock Co.
Does federal law preempt a state's authority to require permits under its coastal act for mining operations on federal lands?
Federal statutes, such as the Coastal Zone Management Act (CZMA) and the National Forest Management Act (NFMA), establish federal control over certain activities but do not necessarily preempt non-conflicting state environmental regulation.
The Supreme Court held that federal law does not preempt the California Coastal Commission from requiring Granite Rock to obtain a state permit. The Court found that there was no direct conflict between federal law and the state's requirements.
This decision underscores the doctrine of cooperative federalism, where both federal and state governments can have roles in regulating the same domain, especially in environmental regulation. It affirms that states may impose additional environmental regulations provided they do not directly conflict with federal law, which is paramount for law students understanding the preemption doctrine's limits and state authority in environmental management.