Tennessee Valley Authority v. Hill

1978-06-15

Headline: Court upholds the Endangered Species Act to block operation of a nearly finished federal dam, stopping the Tellico project and prioritizing protection of the snail darter over continued construction and appropriations.

Holding: The Court held that the Endangered Species Act requires federal agencies to avoid actions that would destroy listed species or critical habitat and that a court may enjoin operation of a virtually completed dam; appropriations did not repeal the Act.

Real World Impact:

Blocks operation of the Tellico dam, halting reservoir filling and shoreline development.
Requires federal agencies to avoid actions that would destroy listed species or critical habitat.
Congressional funding cannot be read to override the Endangered Species Act.

Topics: endangered species protection, dam projects, wildlife habitat, environmental regulation

Summary

Background

The dispute involves the Tennessee Valley Authority (a federal public corporation) and conservation groups and local citizens who sued to stop completion and operation of the Tellico Dam. Construction began in 1967 and by the mid-1970s the dam was virtually complete. A new fish, the snail darter, was discovered in the river; Congress passed the Endangered Species Act in 1973, and the Secretary of the Interior listed the snail darter as endangered in 1975 and identified its critical habitat in the part of the river that the dam would flood.

Reasoning

The central question was whether the Endangered Species Act bars federal agencies from taking actions that would destroy a listed species or its habitat, even if a project is nearly finished, and whether continued congressional funding repealed the Act. The Court accepted the Secretary’s findings that operation of the dam would eradicate the snail darter and held that §7 plainly commands federal agencies to insure their actions do not jeopardize endangered species. The Court also rejected the idea that yearly appropriations for the dam amounted to an implied repeal of the Act.

Real world impact

The Court affirmed that courts can enjoin federal agency actions that would destroy endangered species or their critical habitat, even when a project is largely complete and significant public funds have been spent. The ruling gives the Endangered Species Act clear, enforceable effect against agency projects and limits the ability to rely on later appropriations to override species protections.

Dissents or concurrances

Two Justices dissented, arguing the Act should not be read to stop completed or substantially completed projects and that courts have discretion to deny injunctions in such equity cases.