In 1982, four years before the Statue's centennial anniversary, President Ronald Reagan appointed Lee Iacocca, the Chairman of Chrysler Corporation, to head the Statue of Liberty - Ellis Island Foundation. The Foundation was created to lead the private sector effort and raise the funds for the renovation and preservation of the Statue for its centennial in 1986. The Foundation worked with the National Park Service to plan, oversee, and implement this restoration.Workers repaired holes in the copper skin and removed layers of paint from the interior of the copper skin and internal iron structure. They replaced the rusting iron armature bars (which joined the copper skin to the Statue's internal skeleton) with stainless steel bars. The flame and upper portion of the torch had been severely damaged by water and was replaced with an exact replica of Bartholdi's original torch. The torch was gilded according to Bartholdi's original plans.
The restoration was completed in 1986 and the Statue's centennial was celebrated on July 4 with fireworks and fanfare. On July 5th, a new Statue of Liberty exhibit opened in the base of the pedestal.
When I visited in 1994 with my young son, we were able to go to the top of the crown observation deck. In the three of four times I have visited in the 2000s, you can only go to the top of the pedestal.
I spent several weeks in New York City in 1984 and remember that the Statue of Liberty was off-limits to the public at that time.