Washington University Law Review Volume 71 Issue 4 A Tribute to Professor Merton C. Bernstein January 1993 Prior Appropriations Water Rights: Does Lucas Provide a Takings Action Against Federal Regulation Under the Endangered Species Act? Michael A. Yuffee Washington University School of Law Follow this and additional works at: https://openscholarship.wustl.edu/law_lawreview Part of the Environmental Law Commons, and the Legislation Commons Recommended Citation Michael A. Yuffee, Prior Appropriations Water Rights: Does Lucas Provide a Takings Action Against Federal Regulation Under the Endangered Species Act?, 71 WASH. U. L. Q. 1217 (1993). Available at: https://openscholarship.wustl.edu/law_lawreview/vol71/iss4/18 This Note is brought to you for free and open access by the Law School at Washington University Open Scholarship. It has been accepted for inclusion in Washington University Law Review by an authorized administrator of Washington University Open Scholarship. For more information, please contact
[email protected]. PRIOR APPROPRIATIONS WATER RIGHTS: DOES LUCAS PROVIDE A TAKINGS ACTION AGAINST FEDERAL REGULATION UNDER THE ENDANGERED SPECIES ACT? Twenty years ago, Congress passed the Endangered Species Act' as part of a series of ecologically-focused legislative acts.2 The Endangered Species Act (ESA) codifies the federal policy of protecting endangered and threatened species by designating and maintaining critical habitats.3 While this policy may be the most effective way to manage the species conserva- tion effort, it may potentially conflict with private property rights.4 Applying the ESA to state-derived private property rights, such as appropriations water rights, showcases a potential conflict between these state rights and federal regulation.5 In its history, the ESA has never been applied to include private property within a protected species' critical habitat.