The targeted finish date is November 2010, five years after the aquarium opened.
The aquarium recently opened a new permanent building on June 1st 2012.
However, once the aquarium opened, attendance numbers were much lower than expected.
The 35,000-square-foot brick structure has been vacant since the aquarium opened in 1983.
The aquarium opened in 1985 after 10 months of construction.
The fair and the aquarium opened on May 22.
The aquarium opened to the public on August 8, 1981, after three years of construction.
The aquarium opened to the public on December 16, 2011.
However, after the aquarium opened in March 1995, the number of visitors and tourists fell well below expectations.
Last month the aquarium opened an office on Main Street.