A bill to amend the Endangered Species Act of 1973 in order to clarify the provisions of the Act regarding Federal agency cooperation.

Amends the Endangered Species Act of 1973 to exempt certain Federal public works projects which affect the navigable waters of the United States from being deemed to have jeopardized the existence of an endangered species, or destroyed or modified the habitat of such species.

Authorizes the Secretary of the Interior to prescribe by regulation requirements regarding the construction or operation of such projects as may be necessary to minimize harm to endangered species in the area affected by the project.

Declares that the harming or billing of endangered species within the area directly affected by such projects will not be deened a taking of such species under the Act if such harming or billing is directly attributable to the construction or operation of such project, or not in violation of a requirement imposed by the Secretary under this Act.