United States v. California
Headline: Clarifies California coastal boundaries: Court excludes specified piers and artificial structures from the coastline and defines inland waters in San Pedro and San Diego, affecting state–federal seabed claims and coastal mapping.
Holding:
- Clarifies which coastal features count when drawing federal-state seabed boundaries.
- Prevents listed piers and Rincon Island from extending California’s coastline baseline.
- Orders equal sharing of Special Master expenses and return of leftover funds.
Summary
Background
This order is a fourth supplemental decree in a long-running coastal boundary case between state and federal parties, following earlier decrees dated 1947, 1966, 1977, and 1978. The dispute concerns how to draw the federal-state boundary off California’s coast under the Submerged Lands Act and which coastal features count as the coastline. The parties paid their own costs and jointly funded a Special Master to handle technical work.
Reasoning
The core question was how to define inland waters and whether certain man-made structures should be treated as part of California’s coastline for drawing the federal-state boundary. The Court answered by specifying straight-line limits that define the inland waters of the Port of San Pedro and San Diego Bay. It also listed 16 artificial structures—primarily piers, plus a causeway and Rincon Island—and held that those structures do not form part of the coastline for purposes of the Submerged Lands Act. The decree further directs the Special Master to divide any remaining funds equally and confirms that the Court will keep jurisdiction to enforce the order.
Real world impact
The order fixes precise coastal measurements in these two harbors and prevents the listed piers and structures from extending the legal coastline used to set the federal-state seabed boundary. That decision will guide mapping, resource claims, and regulatory authority in the affected areas. The Court’s retention of jurisdiction means the ruling can be enforced or supplemented later if needed.
Dissents or concurrances
Justice Marshall did not participate in the consideration or decision of this order.
Ask about this case
Ask questions about the entire case, including all opinions (majority, concurrences, dissents).
What was the Court's main decision and reasoning?
How did the dissenting opinions differ from the majority?
What are the practical implications of this ruling?