The final Environmental Impact Statement (plan/FEIS) evaluates whether and how to bring wolves to Isle Royale to function as the apex predator within a changing and dynamic island ecosystem. The NPS preferred alternative is Alternative B, which calls for the introduction of 20 to 30 wolves over a three-year period. The goal of this alternative is to provide an introduction of wolves that has the potential to become a self-sustaining population.
After a waiting period of at least 30 days, the NPS will concern a Record of Decision that documents the final decision and sets out a course of action for the project.
Here is a link to the document:
Isle Royale National Park Environmental Impact Statement to Address the Presence of Wolves
Executive Summary: alternative B is the preferred plan
Alternative B includes a limited introduction of wolves to the park over a 3-year time period. This alternative would provide an immediate introduction of a large enough number of wolves to establish a healthy population that functions as an apex predator throughout the 20-year planning period. After the third year, should an unforeseen event occur, such as disease or mass mortality, that impacts the wolf population and the objectives of the alternative are not being met due to this event, wolves may be supplemented for an additional 2 years. No wolves would be introduced after 5 years from date of initial introduction.