ASHLAND, Neb. (AP) — The Henry Doorly Zoo & Aquarium is planning to overhaul its safari park near Ashland, but officials have not announced what those plans will entail.

Zoo CEO and executive director Dennis Pate said he and his staff have started working on a master plan to reconfigure the Lee G. Simmons Conservation Park and Wildlife Safari.

The plan is due out by the end of the year.

The $3.5 million park opened in June 1998, focusing on North American species. It now features animals such as bison, black bears, eagles, wolves, elk, deer and sandhill cranes.

It is open seasonally from spring until fall and drew 143,668 attendees last year.